Welcome to Harris Performance, this site dealing with the TPI Tune Port Injection system used by GM from 1985 through 1992. Black Bear Performance was started in 2006 with the premise that vehicle-specific data will yield a better, more consistent tune and that is still the same today. LS1 Hotcam vs. 10208890: 1994 through 1996 LT 350ci V-8. The world's absolute lowest prices since 1985. The following change may be necessary for correct engine assembly: For LT1 and L98 engines (pre-1996) the dowel pin in the end of the camshaft must be pushed in so extension from end of cam. I would run a GOOD higher volume fuel pump (Walbro 255) Ignition Upgrades, Not much you can do on a L31, Except for BS that doesn't do anything for you. cadillac 472 500 cam button chp-vt95. 10207643: 1994 through 1996 LT 350ci V-8. If you're looking for turn-key power and performance, you've come to the right place. 50 compression. DynoJet testing of ZZ4-TPI w/ LT4 HOT cam To compare the benefit (anticipated) of the AFR190 heads, I took my car up to a local shop with a DynoJet Chassis Dyno for some "pre-swap" tests. On 1994-’96 LT1 engines with cast iron heads, the pilot hole in the front of the cam is larger and deeper, with a longer (0. View; 12 / 24 / All Small Block Hydraulic Roller. This Mustang Dyno has been verified to be 10% lower than a Dynojet. L31 writes "Here is the Ramjet cammed carbureted 350 dyno test I. Developed by Chevrolet Performance engineers as a direct replacement for the factory-installed heads and camshaft (tuning required. Camshaft Specs (12551705): 205/207 duration @ 50*,. The most popular o scale model railroad buildings brands include O-Gauge Railroading, Bachmann, Woodland Scenics, B. This is a quick weekend upgrade that is affordable and results in good power. A head swap would also be nice. The LS 376/525 crate engine was developed for the high-rpm world of Circle Track racing - see race engine images, dyno specs, installation info and more. 045" quench with. 8:1, which was a noted increase over the 10. 0L engine 317 or 241 heads within the Internal Engine forums, part of the LSx Technical Help Section category; hello, here is what i have: 99 s-10 5. 5 rockers and IMO it had good low to mid range torque. Run on the dyno with the stock cam using the Speedmaster. 050 in): 215° intake / 223° exhaust Cam is around $300. RPM AIR-GAP™ (1500-6500 rpm) For Chevrolet LT1 and LT4 V8 (1992-1997) Utilizing the proven short runner tunnel-ram style, both of these manifolds provide the next step up in performance for LT1 and LT4 owners. Roller Rocker & Camshaft Swap Kit - $987. This was the result. The HOT Cam specs were developed to insure long term valve train durability along with a broad and responsive torque curve. I am gathering parts for another engine, I could rework this one but the block doesn't have the provisions for a roller cam, and I want to take some weight off the nose of the truck, soo I'm better off starting over I already have a roller cam that has specs very close to the GM LT4 hot cam and a TPI setup I got from ITALAGT that is set up for. There are some reports of early LT4's with 10mm top threads. Basically a LT4 Hotcam that will drop into a Vortec 350 engine. GMPP LT4 HOT CAM KIT (P/N 12480002) INSTALLATION INSTRUCTIONS: APPLICATIONS The hot camshaft is designed for all hydraulic roller camshaft small block engines produced from 1986 to present including the Gen I, Gen IE, and Gen II variety. Other refinements to the LT4 included a roller-type timing chain, a refined crankshaft, camshaft, water-pump, driver gear and main bearing gaskets to help bolster horsepower and accommodate the additional engine compression - which increased to a ratio of 10. Another option is the LS6 beehive springs (GM part# 12499224) combined with Comp Cams 648-16 valve stem locks and 787-16 retainers. the only "required parts" are all contained in the LT4 hot. Our original answer combined the Chevrolet Hot cam with a set of these Vortec heads. LT4 Hotcam question I have been looking at different cams, and I want a set up that will be a somewhat smooth idle (because it is my everyday driver), but I still want to be able to get some power. Click the button below to add the Valve Spring Kit, SB Chevy VORTEC, HI-Perf Hyd Roller, 130 Lbs Seat Pressure, VSK4H53 to your wish list. Was told this by an old time racer and you know what? it works. That and something I can take advantage of my 3200 stall converter, long tube headers & 4:10 gears. In the previous story we introduced you to budget-buildup artist Tim Moore s 355ci small-block featuring its stock Vortec iron heads, GM Performance Parts HOT cam, and 9. That's what I'm using on my L31 with a hot cam. All 1996+ Vortec trucks. Small Block Hydraulic Flat Tappet. With that the Edelbrock Performer EPS intake manifold has a runner design that's "tuned" for peak torque at 3500 rpm on a 350-inch engine making it ideal for power from off-idle to 5500 rpm. 13-1 compression with the Vortec 64cc heads The cam is a LT4 Hot Cam with Proform 1. Take a look at this:. 7L V8 327 5. 041" compressed head gaskets. 428" on a 111ºLSA. Both the LT1 and the LT4 Heads accomodate 7/16" studs but the LT4 has larger 7/16 rocker studs. Welcome to Harris Performance, this site dealing with the TPI Tune Port Injection system used by GM from 1985 through 1992. With this cam you can keep the same tune you have. camshaft: LT4 Hot Cam & 1. I don't want to get over 220 duration intake OR exhaust. We offer custom ECU mapping for most GM vehicles: All 1993+ and up LT1 cars. The LS based small-block engine is the primary V8 used in General Motors' line of rear-wheel-drive cars and trucks. As such, the L31 head is compatible with all older small-blocks, and is a very popular upgrade. Find Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts 24502586 and get Free Shipping on Orders Over $99 at Summit Racing! These LT4 Hot Cams from Chevrolet Performance are direct replacements for your stock LT4 hydraulic roller cam. The LT1 was available only with the automatic. Power 2 Comp Cam Kit 470 - 480+ Dual pattern cam for best vacuum (call for custom cam applications) Power 2 Comp Cam Kit 480 lift Single pattern cam (best to give us a call on your needs) If you request a different cam, you will need to speak with one of our expert counter men. I know people are always interested what the hotcam will put down I will post my results I got it dyno'ed on a dyno jet dyno today. However, there's some things you can do to improve the Optispark. GM's LT4 hot cam with 1. I wish Comp's Thumpr series was computer friendly. This is where the Edelbrock Power Package excels. About 8K miles ago i did a complete tune up with new delco iridium plugs, and plug wires, cap and rotor, coil and ignition module all from performance distributors, their firepower ignition kit I also have an LT4 Hot Cam, new upgraded felpro intake gasket kit, new timing cover, sanderson 1 3/4 primary 3" collector swap headers, corvette HD. LT4 heads can be installed on an LT1 block if the LT4 electronic TPI manifold is used. 0 in the 1/4 mile. Home >> Tech Center >> Research Center >> C4 Corvette Center >> 1996 Corvette Center >> 1996 LT1 vs. If You Are Looking For A High Performance Dyno-Tuned Engine, Give CHP A Call To Chat With An Expert. Congratulations to ThirdGen. You will need to change springs,keepers ect. It is the best-flowing factory iron cylinder head made so far, as hot rodders soon discover. GM designed this engine to last the life of your car, while still being capable of delivering monster horsepower. 5 rockers which is pretty close the same specs as the LT1 cam, but the LT4 is a little more aggressive on the exhaust lobes to help complement the excellent flowing intake side of the vortec heads. Comp Cam for Camaro/Firebird 93-97 LT1/LT4 engines, call for custom applications, shipping is not included. The block was decked. It is a longer-stroked (by 9 mm (0. 0 mm) stroke. We are dedicated to tuning your vehicle's engine computer to attain maximum performance and the best drivability possible while keeping the powertrain reliable. Quick View. And i just assumed you were going to use small tube headers. With that combination, I've mesured. From GMPP catalog 12480002 350 Hot Cam Kit. 383 turbo cam. Matter of fact if you look at Gilbert Chevrolet web site they give you some numbers based on their dyno sheets that state just that. The T-stat housing on a Gen III (LS-style) engine is the - RPM Custom LT1 AFM Delete Camshaft Package (Includes - RPM Custom Spec'd Comp Cam w/ Increased Fuel Flow Lobe, Brian Tooley Racing Dual Valve Spring Kit, Brian Tooley Racing Hardened Pushrods, ARP Head Stud Kit, Katech C5R Timing Chain, GM LS7 Lifters w. A camshaft is an engine part attached to the cams and converts rotational motion into oscillatory motion. Find Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts 24502586 and get Free Shipping on Orders Over $99 at Summit Racing! These LT4 Hot Cams from Chevrolet Performance are direct replacements for your stock LT4 hydraulic roller cam. Instead of going through all the work to change the cam I would try the Rockers alone. Dyno Graphs. DO NOT set them exactly where you want them to The following change may be necessary for correct engine assembly: For LT1 and L98 engines (pre-1996) the dowel pin in the end of the camshaft must be pushed in so extension from end of cam is. 459" lift, 117 Lobe Seperation Angle Rocker Arms: (10089648) 1. Employer response to candidate withdrawal template. sooner Veteran Member Lifetime Gold Member. LT4 Supercharged 6. o scale train buildings, Hobbylinc carries over 300 o scale model railroad buildings at discounts up to 40%. Too much extra weight on the tip floats the valves sooner. As such, the L31 head is compatible with all older small-blocks, and is a very popular upgrade. Modified fuel, spark tables and timing compensation at all areas of throttle angle. 0l 765528 Performance Bmw Hp Engine 03-06 Fits 330i Coupe. 3L crank and rods, flat top pistons, and lt4 cam with 1. 383 turbo cam. The LT4 cam has specs in the ballpark I want. 5:1 ratio Roller Rocker Arm Set, 1. I went with a KB106 piston (10. Small Block Camshaft Rear Cover Kit. 52 You'll need to make sure that all your seals are well seated and you'll have to use: Comp cam Beehive springs 26915 or 26918 Comp cams 787 retainers Comp cams 648 keepers. S Modified Crate Engine RPM SealedJust as an engine can't have too much horsepower, the same holds true for starters. I put down roughly the same hp with the current cam but gained 50 rwtq down lower in the rpm band. The LT1 was available only with the automatic. Ive seen guys using the LT4 (i think) hot cam, and the RV cam with decent results and not too expensive. The LS based small-block engine is the primary V8 used in General Motors' line of rear-wheel-drive cars and trucks. Im trying to get an idea about how much difference its gonna make to run a lt4 hot cam with a 1. You can see 30-35hp and 40-50 lbs/ft on a stock aluminum head TPI Corvette engine and with the addition of 1. There are a bunch of reviews and articles on line on that exact build and they make 400hp all day and are very street able. 5 a/f, my nb o2 were reading about 920mV during the pull. Dyno tests revealed a peak output of 162 horsepower at 4400 rpm with a two-barrel carburetor and single exhaust. Chevy V8 marine engines with 1996-later Vortec (L31) cast iron heads. Just a camshaft change resulted in a 15 hp and 30-plus tq gain. 1 hp on the dyno with about 413lbs-ft. I don't want to get over 220 duration intake OR exhaust. Iron blocks have extra-thick, siamesed cylinders, sturdy. The LT1 was available only with the automatic. I knew it wasn't running to its fullest potential. The LT1 and the car are now gone, but I've left all the information!! Included on this page is the VATS page, showing how to bypass GM's anti-theft system used in many early 90's vehicles. 6:1 roller aluminum rocker arms, high-flow intake manifold (painted red) with extra material above the port available to allow port matching to the raised port LT4 cylinder heads, it was rated at 330 horsepower (250 kW) and 340 lb⋅ft (461 N⋅m). That's what I'm using on my L31 with a hot cam. Hidden beneath the composite intake manifold is our LS3’s secret weapon – GMPP’s “Hot Cam” that adds an extra 50 horses. Cost involved: about $20 worth of grinding and finishing supplies. I stipulate they must be clean, free of unusual corrosion, and have reasonable miles for an aftermarket project or second car. - SBC Cylinder Head Info - Also if you have a cam with less than. Planet earth 2 watch online. 500 of an inch and above mean nothing to you. 525 inch of lift (with the recommended 1. 015 gasket to up compression to 10. 1980 Sierra C15 Junkyard L31 Vortec 350 Summit K1107 488 510 Lift Cam Cold Start Rough Idle Chevrolet Cylinder Head Dyno Test. Welcome to Fuel Injection Specialties, your source for everything EFI. l31 : 409 cid v8 400hp (special high performance-solid lifter cam) L32 : ENGINE, GAS, 6 CYL, 3. 0 mm) stroke. LT hot cam would be a good start on a budget. For comparison the OEM 1996-2002 Vortec 305/350 RPO L30/L31 cam specs are 191º/196º [email protected] 0. Small Block Hydraulic Flat Tappet. They are also not compatible with any of the current LS engines. DynoJet testing of ZZ4-TPI w/ LT4 HOT cam To compare the benefit (anticipated) of the AFR190 heads, I took my car up to a local shop with a DynoJet Chassis Dyno for some "pre-swap" tests. Just keep looking, the cam is always the hardest thing to decide on. A lot of people recommend looking at the flows around. It is part of GM's Gen III Small Block engine. Performer rpm air gap intake. 6 rocker arm kit P/N 12367346 require the valve guides to be machined for proper valve guide-to-retainer clearance when using the stock 350/290 heads. Spark timing is 2 degree's over stock(at 100kpa) running 93 octane. 5:1 stamped steel rockers you allready run. I finally decided to make the jump from EFI to carb. This is a discussion on LS1 Hotcam vs. Developed by Chevrolet Performance engineers as a direct replacement for the factory-installed heads and camshaft (tuning required. SBC LT4 Hot Cam Question I have a longer term plan to build a 383 stroker, but in the interim I have picked up a solid L31 Vortec 350 from a 2000 GMC 2500 Van - I am going to clean it up and do marine gaskets in it. For stock power production, the hot ticket is the L31, Vortec-headed 350 offered from 1996-’02 in truck, van, and SUV applications. LT1 Valve Spring Kit, Moderate to Hot Cam Profiles, 135 Lbs Seat Pressure, Vsk4J21-Q5. And i just assumed you were going to use small tube headers. If you have your mind set on a bigger cam. 8 to 1 compression ratio. But I have seen some Dyno run on 350s with the XE262H and it make near the same HP as the XE268H. When the ECM knows the true camshaft position, engine speed and such, it can fine-tune ignition timing for each cylinder under a wide range of conditions. Displacement is 5. Performer rpm air gap intake. 5 ratio 3/8 comp cam rocker arms and a lt4 hot camshaft. 66 5 left in stock Lowest Price Guarantee $ + $ $ Small Block Chevy LT1/LT4 Hot Camshaft Kit See more product details. Hidden beneath the composite intake manifold is our LS3's secret weapon - GMPP's "Hot Cam" that adds an extra 50 horses. They are 5. DynoJet testing of ZZ4-TPI w/ LT4 HOT cam To compare the benefit (anticipated) of the AFR190 heads, I took my car up to a local shop with a DynoJet Chassis Dyno for some "pre-swap" tests. 525" lift should I choose to go with a larger cam. Used on LT1. 5:1 stamped steel rockers you allready run. Considering CHP Is The Driving Force Behind Most Of The Viable Cadillac Performance Parts Sold Today, It Won't Take Long To Find Out Why We Are The Worldwide Leader For These Impressive Cadillac 500/472/425. A really popular cam with a carbureted vortec 383 is the comp xr282hr which specs out at 230/[email protected] duration and. Adding a four-barrel and dual exhaust pipes bumped that to 180 horsepower at 4600 rpm. 3L crank and rods, flat top pistons, and lt4 cam with 1. The LT1/LT4 are reverse coolant flow and the LS1 is a different style head. Find Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts 24502586. Run on the dyno with the stock cam using the Speedmaster. Find PROMAXX Performance Vortec 185cc Iron Cylinder Heads 2151 and get Free Shipping on Orders Over $99 at Summit Racing! PROMAXX Performance goes one up with their Vortec iron cylinder heads, 1986 and older. 7 and you will find all the supporting mods. Tom Sallee says it will give my motor another 125 hp with the cam alone!! The Hot Cam kit is around $550. 500 inches of lift then the flows at. 7L LS1 V8 engine was produced by General Motors for use in high-performance vehicles such as the Chevrolet Camaro and Corvette, among others. I didn't know exactly what CFM a stock 350 TBI flows, so i guessed 600cfm. o scale train buildings, Hobbylinc carries over 300 o scale model railroad buildings at discounts up to 40%. 8 to 1 compression ratio. 391" raised camshaft bores. Used on LT1 and L99. 78-inch (96 mm) bore and 3. If I were to do the heads and everything but the cam, do you think it would be stout as an everyday driver? Stock L98's have 340 ft. This is an excerpt from the Vortec thread: The Gary Penn Discussions -. 344: 334: 96 GS #470: Todd Emanuel: Dynojet - John Haley Motorsports (Jun 2002) Hot Cam, TPIS longtubes, no cats, Corsa, AFPR, K&N/open lid. Check out these First Generation 1996-1998 GM Vortec fuel-injected 350 Engine Power Upgrades, including exhaust, throttle body, and more, at Sport Truck Magazine. Its cylinder heads and block were cast iron, it received fuel through a multi-point fuel injection system and its components were compatible with all smaller engines in the Chevy first- generation small block family. All 3 pulls were with in a few hp even with me changing the a/f. Xtreme Energy Camshaft™ Dyno Results Xtreme Energy Cams™ bridge the gap between Magnum street cams and race only cams. Dyno tests revealed a peak output of 162 horsepower at 4400 rpm with a two-barrel carburetor and single exhaust. The programs available provide smoother shift or harsh depending on the request. Introduced in January 1995, it is a "clean sheet" design with only rod bearings, lifters, and bore spacing in common with the longstanding Chevrolet small block V8 that preceded it as the basis for GM small-block V8s. The following change may be necessary for correct engine assembly: For LT1 and L98 engines (pre-1996) the dowel pin in the end of the camshaft must be pushed in so extension from end of cam. Matter of fact if you look at Gilbert Chevrolet web site they give you some numbers based on their dyno sheets that state just that. LT4 Engine Comparison Supporting Vendors / Dealers - Advertising - Shop 1995 Corvette Center. In the previous story we introduced you to budget-buildup artist Tim Moore s 355ci small-block featuring its stock Vortec iron heads, GM Performance Parts HOT cam, and 9. World’s top manufacturer of performance camshafts, lifters, valve springs, rocker arms and related valve train parts for all race and street performance engines. Quick View. 525" 218/228. In CALIF 1-661-861-0125 Out of State 1-661-861-0167. According to the dyno chart, the LT4 produces 457 lb-ft of torque just off idle and 625 lb-ft by 2,800 rpm. 8:1, which was a noted increase over the 10. CedarValleyMotorSports. Scoggin-Dickey Parts Center is one of the largest automotive supply centers in the world. 041" compressed head gaskets. but idled like ass and liked to ALMOST stall out when my e-fans kicked on. The sports car rides on a Art Morrison IRS chassis with JRi double-adjustable coilovers, Woodward road racing steering rack, and Wilwood six-piston calipers with 14-inch rotors. With that the Edelbrock Performer EPS intake manifold has a runner design that's "tuned" for peak torque at 3500 rpm on a 350-inch engine making it ideal for power from off-idle to 5500 rpm. 6 L) in displacement. o scale train buildings, Hobbylinc carries over 300 o scale model railroad buildings at discounts up to 40%. Xtreme Energy Camshaft™ Dyno Results Xtreme Energy Cams™ bridge the gap between Magnum street cams and race only cams. 6 rocker arm kit P/N 12367346 require the valve guides to be machined for proper valve guide-to-retainer clearance when using the stock 350/290 heads. Was told this by an old time racer and you know what? it works. 8:1, which was a noted increase over the 10. It is part of GM's Gen III Small Block engine. 5 rockers and IMO it had good low to mid range torque. Cast-iron, reverse-flow cooling. "The idea behind it was to offer somebody a very simple plug-and-play alternative to an LS engine," Philippin said. I ran a 228/[email protected]" and. L98 Cam Choice - posted in Performance Modifications: I would like to put a cam in the Formy while we got the engine out. GM crate 8,800+ GVW L31, production LT4 camshaft 203/210 @. The Big Problem with Chevy's 5. The carb was a Holley 80508-S 750 which was crap and I still ran 400. 6 ratio rocker arm and requires no machining on the head. 4:1 compression found in the engine's. i swapped to the 0411 and now i have more of that "cammed" sound at idle but it also idles better if that makes sence. Just a pretty much stock vortec 350 with the stock GM LT4 corvette cam and 1. 2 l kits 2009-2015 cts-v cadillac 472 500 camshaft bearings-standard or grooved-chp-ep04. Tom Sallee says it will give my motor another 125 hp with the cam alone!! The Hot Cam kit is around $550. For comparison the OEM 1996-2002 Vortec 305/350 RPO L30/L31 cam specs are 191º/196º [email protected] 0. 473" intake / 0. With this cam you can keep the same tune you have. 510 Exhaust w/ 1. I don't remember the specs on the LT4 cam, but I really like the cam that GM used in the Ram Jet 350 and the HT383. 5 ratio 3/8 comp cam rocker arms and a lt4 hot camshaft. Just a camshaft change resulted in a 15 hp and 30-plus tq gain. Vortec 350s now use a composite plastic timing cover instead of stamped steel. 7 Vortec Long Block, Mercruiser Marine, 350 Crate Motors and Complete Turnkey Engines for Your Hot Rod, Muscle Car & Classic Truck!. Chevy V8 marine engines with 1996-later Vortec (L31) cast iron heads. My guess is that you will never know the difference. if you dont want to go the beehive spring route, you can buy the tool to machine your guides. Edelbrock Carb 750 CFM with electric choke. The Ultimate Body Manual for Camaro Covers every essential body component and much more! D Literature, CDs & Videos 1967-81 Fisher Body Manuals All Fisher body manuals have the complete information on the essential removal, installation and adjustment procedures for servicing each year Camaro. This cam is 219/229 dur at. This particular cam is a great little upgrade for a TPI 305 or 350. This cam is great for additional bottom end torque. Referred to as a "small-block" for its comparative size relative to the physically much larger Chevrolet big-block engines, the family spanned from 262 cu in (4. I stipulate they must be clean, free of unusual corrosion, and have reasonable miles for an aftermarket project or second car. The Lt4 hot cam (218/228. On 1994-’96 LT1 engines with cast iron heads, the pilot hole in the front of the cam is larger and deeper, with a longer (0. camshaft: LT4 Hot Cam & 1. 383 turbo cam. 3 ENGINE BLOCKS Chevrolet Small Block Aluminum & Iron Engine Blocks Aluminum blocks weigh just 95 lbs. With our CNC Sportsman Porting or "Undercover Porting", the 185cc head will support engines making over 540 horsepower with incredible throttle response. The 275DEH is as big that I would go. On the dyno all this work added up to a 12-hp gain at 7,500 rpm on the 300-rpm/sec acceleration range on a Super Flow dyno. This was the result. Classic Industries offers a wide selection of 1975 Chevrolet Truck parts, including 1975 Chevrolet Truck interior parts and soft trim, 1975 Chevrolet Truck exterior sheet metal, 1975 Chevrolet Truck moldings, 1975 Chevrolet Truck emblems, 1975 Chevrolet Truck weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. If you're looking for turn-key power and performance, you've come to the right place. Our huge selection of crate engines come from top engine builders like BluePrint, Edelbrock, GM Genuine Parts, Chevrolet Performance, and Speedway Motors Racing Engines. Take a look at this:. 6 rockers car can't be driven on the open road since there are no hood. I stipulate they must be clean, free of unusual corrosion, and have reasonable miles for an aftermarket project or second car. Engine: -MSD 6AL ignition box set at 6,000 rpm rev. However, there's some things you can do to improve the Optispark. Complementing the cam, we increased the rocker ratio from the stock 1. Originally designed by Chevrolet Racing for the 1996 LT4 Fuel Injected 5. NOTE: The Gen-II LT4 camshaft P/N 24502586 was designed to be used in many different engines. 383 turbo cam. The LT1/LT4 are reverse coolant flow and the LS1 is a different style head. Scoggin-Dickey Parts Center is one of the largest automotive supply centers in the world. About 8K miles ago i did a complete tune up with new delco iridium plugs, and plug wires, cap and rotor, coil and ignition module all from performance distributors, their firepower ignition kit I also have an LT4 Hot Cam, new upgraded felpro intake gasket kit, new timing cover, sanderson 1 3/4 primary 3" collector swap headers, corvette HD. If you have your mind set on a bigger cam. it made good power driving around. Matter of fact if you look at Gilbert Chevrolet web site they give you some numbers based on their dyno sheets that state just that. It's now called the LT4 Hot cam. 52 You'll need to make sure that all your seals are well seated and you'll have to use: Comp cam Beehive springs 26915 or 26918 Comp cams 787 retainers Comp cams 648 keepers. 2L engine found in the youve got history on your side! production Corvette Stingray and Camaro SS, and adds a very hot camshaft, an all-forged rotating assembly, CNC-ported heads and a Holley Hi-Ram intake manifold, similar to the one on the COPO 427. It is the last production Generation I small-block from Chevrolet. 2L (376 cubic inches) engine and swapped the stock camshaft for the racing-inspired LS Hot Cam (P/N 88958733), they result was a stunning 480 horsepower and 475. This load is transferred through the drivetrain to the engine and allows the tuner to adjust calibration settings for operating conditions that. I didn't know exactly what CFM a stock 350 TBI flows, so i guessed 600cfm. Welcome to our GM programming page. PAC-12495494 - Pace Performance LT4 Hot Cam Spring Install Kit, For Camshafts Up To. 1 cu in)) from 3. 050" lift, 0. This will give you the clearance you need for the LT4 Hot Cam with a 1. 6 roller rockers. LS6 cam within the Internal Engine forums, part of the LSx Technical Help Section category; Which one will make more power? Which would have the flatter torque curve also? Does anyone have any dyno sheets. DynoJet testing of ZZ4-TPI w/ LT4 HOT cam To compare the benefit (anticipated) of the AFR190 heads, I took my car up to a local shop with a DynoJet Chassis Dyno for some "pre-swap" tests. The proper distributorgear for your camshaft differs by both the material and the kind oflifter for which your camshaft was designed. 24502586 Hydraulic Roller (LT4 Hot Cam) This hydraulic roller cam is. '94 Impala SS- 355 TRW pistons, MTI ported aluminum lt1 heads, 2. If you have your mind set on a bigger cam. 10208890: 1994 through 1996 LT 350ci V-8. I can tell you this, I like the sound of the LT4 hot cam. 4L 304 Stroker 5. It's been suggested I run a Comp Cams tripower extreme (TPX254HR) 254/264,. 7L vortec block with 64cc heads (and remove all the computer stuff and efi along with the cam and rocker arms)-ls6 valve springs with the comp cams retainers-self aligning 1. camshaft: LT4 Hot Cam & 1. 0l Coupe 235 Hp Performance Package Fits 03-06 Bmw 330i 765528. 5" Y-pipe, single 3" mandrel bent w/ Flowmaster Super 40. DO NOT set them exactly where you want them to The following change may be necessary for correct engine assembly: For LT1 and L98 engines (pre-1996) the dowel pin in the end of the camshaft must be pushed in so extension from end of cam is. carburetor provides nostalgic and period correct hot rods and restorations with the most accurate and best performing carburetor on the market. 4L V8 Boss 260 5. Therefore, the following change may need to be made to allow for correct assembly of the engine: For LT1 and L98 engines 1995 and before, the dowel pin in the end of the camshaft must be pushed in so extension from end of cam is. Other refinements to the LT4 included a roller-type timing chain, a refined crankshaft, camshaft, water-pump, driver gear and main bearing gaskets to help bolster horsepower and accommodate the additional engine compression – which increased to a ratio of 10. This design caused the cooling system to develop hot spots and that is why the 400 heads have steam holes. LT1 Valve Spring Kit, Moderate to Hot Cam Profiles, 135 Lbs Seat Pressure, Vsk4J21-Q5. Both the LT1 and the LT4 Heads accomodate 7/16" studs but the LT4 has larger 7/16 rocker studs. The L31 Vortec head can be used on any SBC engine from 1955 through the end of Vortec production, with the exception of the Gen 2 LT1/LT4 engines used in some vehicles between 1992-'97. 10207643: 1994 through 1996 LT 350ci V-8. "The idea behind it was to offer somebody a very simple plug-and-play alternative to an LS engine," Philippin said. AdvertisementClick Here to […]. For comparison the OEM 1996-2002 Vortec 305/350 RPO L30/L31 cam specs are 191º/196º [email protected] 0. 050" lift and 0. The success of these heads cause every Chevy cylinder head with the double hump casting identifier to be referred to as fuelie heads for an entire generation of hot rodders. This is an excerpt from the Vortec thread: The Gary Penn Discussions -. All 3 pulls were with in a few hp even with me changing the a/f. Find Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts 24502586. 5 ratio 3/8 comp cam rocker arms and a lt4 hot camshaft. The lift is only 1. Move to a 96 and it's a lot more. 457 Lift 262 duration @. I used a LT4 hot cam, LT4 valve springs with the stock lifters and I took the stock rockers and slotted them. Camshaft, TPIS Super L98 Hydraulic Roller Camshaft, SBC 87-92, LT1 93-94. With the addition of a slightly more aggressive camshaft profile, 1. And it's Torque range is down Lower were it is needed on the street. Iron blocks have extra-thick, siamesed cylinders, sturdy. Electrical ; Engine ; Fuel ; Go. Sure, companies like Comp Cams, Crane, and Lunati can grind you a camshaft, custom or shelf, that can do a great job, it also depends on your combination of parts exactly. com-complete running 1996+ 5. 1 cu in)) from 3. Bottom line (and painfully simple); These motors can't take too much of a cam, or anything for that matter, without needing some very expensive conversions. 65 Comp roller rockers, retard cam 4 degrees and make 475/475 and. It was gutless, could barely keep up with traffic and was drinking 10-ish MPG. About 8K miles ago i did a complete tune up with new delco iridium plugs, and plug wires, cap and rotor, coil and ignition module all from performance distributors, their firepower ignition kit I also have an LT4 Hot Cam, new upgraded felpro intake gasket kit, new timing cover, sanderson 1 3/4 primary 3" collector swap headers, corvette HD. As such, the L31 head is compatible with all older small-blocks, and is a very popular upgrade. 050 inches of lift. I saw one post on the web of some dyno numbers on a ZZ4 were the LT4 hot cam, full roller rockers and a Edlebrock air gap added 40hp. 8 to 1 compression ratio. I've been doing a little searching and don't know squat about cams. For stock power production, the hot ticket is the L31, Vortec-headed 350 offered from 1996-’02 in truck, van, and SUV applications. 004" below the deck. Cathedral port cylinder heads have been mistakenly dismissed by many in LS-series circles for being "old-tech. Tom Sallee says it will give my motor another 125 hp with the cam alone!! The Hot Cam kit is around $550. 5:1 stamped steel rockers you allready run. The LT1 was available only with the automatic. Trick Flow Specialties is a leading designer and manufacturer of high performance cylinder heads, intake manifolds, and engine components. We have it all from Muscle Cars, Classics, Exotics, European, Street Rods, Hot Rods and Customs. Performance engineers as a direct replacement for the factoryinstalled heads and camshaft (tuning required), the kit includes our CNC-ported LS3 cylinder heads, which flow more than 350 cfm (intake side), with 276cc intake runners and 2. I am thinking of repacing the stock truck roller cam with an LT4. For the smaller displacement engines like the 5. That's with the LT4 cam, not the LT4 HOT cam. We have over 25 years of experience, specializing in fuel injection system parts and services. We provide a no […]. Camshaft, TPIS Super L98 Hydraulic Roller Camshaft, SBC 87-92, LT1 93-94. Small Block Camshaft Retainer. Tom Sallee says it will give my motor another 125 hp with the cam alone!! The Hot Cam kit is around $550. 471 lift I'm also looking at the GMPP HT383 camshaft. There are some reports of early LT4's with 10mm top threads. According to the dyno chart, the LT4 produces 457 lb-ft of torque just off idle and 625 lb-ft by 2,800 rpm. Other refinements to the LT4 included a roller-type timing chain, a refined crankshaft, camshaft, water-pump, driver gear and main bearing gaskets to help bolster horsepower and accommodate the additional engine compression - which increased to a ratio of 10. That and something I can take advantage of my 3200 stall converter, long tube headers & 4:10 gears. On 1994-’96 LT1 engines with cast iron heads, the pilot hole in the front of the cam is larger and deeper, with a longer (0. I think you'd be OK with that cam. Coil Packs vs. The Vortec cylinder head debuts on L31 350 pickups and vans. This is 3rd gear with the torque converter locked, commanded 3rd/Lockup at 30 MPH and 1,500 rpm. Engines - Engines - We’ve got competition-proven crate engines and custom built engines packages. After looking closely at the cam specs, we noticed that both the stock 350 H. 0l Coupe 235 Hp Performance Package Fits 03-06 Bmw 330i 765528. Milestones: - April 2008: prototype 24x reluctor is made - May 2008: gen1 small block engine running on test stand - July 2008: LT1 engine running coil per cylinder on test stand with LS1 f-body calibration - September 2008: gen1 small block. LT4 Hotcam question I have been looking at different cams, and I want a set up that will be a somewhat smooth idle (because it is my everyday driver), but I still want to be able to get some power. There is very little difference between the duration (212/222 vs 218/228 hot cam)and lift. NOTE: The LT4 camshaft P/N 24502586 was designed to be used in many different engines. Its cylinder heads and block were cast iron, it received fuel through a multi-point fuel injection system and its components were compatible with all smaller engines in the Chevy first- generation small block family. GM LT4 hot cam kit, comp camp 1. Side effect of tomtom sweet during pregnancy. In 1996, an LT4 was available in the Corvette. And i just assumed you were going to use small tube headers. 12371043 Single Roller Timing Chain Kit • Performance kit for all 1987-and-newer engines with roller lifter camshaft, except LT1, LT4 and LS-Series • Includes chain P/N 14088783, crank sprocket P/N 14088784, cam sprocket. Your Choice Of Camshaft: BP-202 Towing / RV Camshaft; BP-203 Street / Strip Camshaft. Cast-iron, reverse-flow cooling. 5:1 stamped steel rockers you allready run. I have posted pages to help those with these systems overcome the limitations of those systems and point out what those limitations are. 500 inches of lift then the flows at. The LT1/LT4 are reverse coolant flow and the LS1 is a different style head. The LT1 engine is a small-block eight-cylinder engine that is produced by Chevrolet. 344: 334: 96 GS #470: Todd Emanuel: Dynojet - John Haley Motorsports (Jun 2002) Hot Cam, TPIS longtubes, no cats, Corsa, AFPR, K&N/open lid. The 185cc Vortec Bow-Tie is the best "under 200cc intake runner head" on the market. The LT4 also came with a more aggressive cam to enhance the better heads. We offer custom ECU mapping for most GM vehicles: All 1993+ and up LT1 cars. I put down roughly the same hp with the current cam but gained 50 rwtq down lower in the rpm band. Too much extra weight on the tip floats the valves sooner. 428" on a 111ºLSA. Find Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts 24502586. • Complete and Dyno Tested • 420-450 Horsepower • 445-455 Torque • Dart SHP Aluminum Heads • 100% Brand New Castings • EFI Upgrade Available. Find PROMAXX Performance Vortec 185cc Iron Cylinder Heads 2151 and get Free Shipping on Orders Over $99 at Summit Racing! PROMAXX Performance goes one up with their Vortec iron cylinder heads, 1986 and older. Side effect of tomtom sweet during pregnancy. 344: 334: 96 GS #470: Todd Emanuel: Dynojet - John Haley Motorsports (Jun 2002) Hot Cam, TPIS longtubes, no cats, Corsa, AFPR, K&N/open lid. Camshaft Lift (in): 0. Did a Desktop Dyno of your setup 350 with L31 vortec's (had the file) and the lt4 hotcam (also had the LT4 hotcam file) 9. S Modified Crate Engine RPM SealedJust as an engine can't have too much horsepower, the same holds true for starters. Accepts square-bore and spread-bore carbs. The LT4 hotcam runs. Comp Beehive springs, retainers & 8. Direct Injected LT4, LT1, L86, L83, LV3 Injector Juice Kit. 473" exhaust Camshaft Duration (@. Take a look at this:. Used on LT1 and L99. 2 L LT4 V8 produces 650 horsepower … Read more. It builds on the strength of the No matter which engine you choose for your race car, LT1 6. According to the dyno chart, the LT4 produces 457 lb-ft of torque just off idle and 625 lb-ft by 2,800 rpm. 050" lift, 0. PAC-12495494 - Pace Performance LT4 Hot Cam Spring Install Kit, For Camshafts Up To. Cost involved: about $20 worth of grinding and finishing supplies. 7L, small block; 2015-Present LT4 - Gen V, 6. Package 235 3. Dyno tests revealed a peak output of 162 horsepower at 4400 rpm with a two-barrel carburetor and single exhaust. The 185cc Vortec Bow-Tie is the best "under 200cc intake runner head" on the market. Cost involved: about $20 worth of grinding and finishing supplies. 7 had a little more power than the non-Vortec 7. They started out by dyno-testing the engine as is and then progressed through about 6 or 7 phases, where they changed certain items and dyno-tested the results. I put down roughly the same hp with the current cam but gained 50 rwtq down lower in the rpm band. Milestones: - April 2008: prototype 24x reluctor is made - May 2008: gen1 small block engine running on test stand - July 2008: LT1 engine running coil per cylinder on test stand with LS1 f-body calibration - September 2008: gen1 small block. what do you guys think?. However, there's some things you can do to improve the Optispark. ZZ4 forged crank & rods H3445NCP-40 pistons,. 0L engines from trucks & suv’s. This Mustang Dyno has been verified to be 10% lower than a Dynojet. 045" quench with. According to the dyno chart, the LT4 produces 457 lb-ft of torque just off idle and 625 lb-ft by 2,800 rpm. Run New OEM Cap, Rotor, Coil. Displacement is 5. LT1 Cam in L31 (Vortec 350) Instead of dealing with the old engine, I went and pulled another L31 out of a surburban with only 119k miles on it. Your question relates to porting the Vortec heads to improve the flow, which is a great idea. We offer custom ECU mapping for most GM vehicles: All 1993+ and up LT1 cars. Comp Beehive springs, retainers & 8. Gen v lt1 head flow. , 26918-16 Performance Street 1. 474 Intake and. 6 rockers as recommended then the swap is really kind of pointless and a waste of money. Anyone have any of these cams and maybe have any tips on what I should look for. best pull was at 13. GM part numbers are #3921912 for 7/16" LT4 and #1255216 for 3/8" LT1. Chevrolet Performance SBC LT1/LT4 Hot Cam Kit. Exhaust =. F-Body Specific (93-97 Camaro and. 11 to 1 compression. Other refinements to the LT4 included a roller-type timing chain, a refined crankshaft, camshaft, water-pump, driver gear and main bearing gaskets to help bolster horsepower and accommodate the additional engine compression - which increased to a ratio of 10. 6L Duramax Turbo Diesel Trucks - LB7/LLY/LBZ/LMM. K07-466-8 contains the following: 07-466-8 XFI 218/224 Hydraulic Roller Cam for GM LT1/LT4, 850-16 OE-Style Hydraulic Roller Lifter Set for '87+ OE Roller SBC and LT/LS Engines. There are some reports of early LT4's with 10mm top threads. Chevrolet Performance’s strong, accurate timing chains and sprockets provide top performance and dependable service. it made good power driving around. Most applications tend to run in the full emissions category. org members. 006 tappet lift. However, there's some things you can do to improve the Optispark. camel hump heads vs. 2016-2019 cadillac cts-v 85kv coil packs lt4 cts0013. The lift is only 1. " However, their thin cross section allows for a high-velocity and smaller-volume runner design with excellent flow. i have searched the forums and talked to the Mechs where i work and have come up with what i feel is the best answer to your (and my) question. The 1955 Corvette V-8 delivered 195 horsepower at 5000 rpm. 6 roller rockers, large tube runners, ported intake, ported plenum. Aluminum, reverse-flow cooling, 175cc intake ports, 68cc exhaust ports. On 1994-’96 LT1 engines with cast iron heads, the pilot hole in the front of the cam is larger and deeper, with a longer (0. but idled like ass and liked to ALMOST stall out when my e-fans kicked on. Matter of fact if you look at Gilbert Chevrolet web site they give you some numbers based on their dyno sheets that state just that. The Hot Cam is :. They are designed to increase horsepower and torque in your LT4. The LT4 was a special high-performance version of the new-generation LT1. The LT1 and the car are now gone, but I've left all the information!! Included on this page is the VATS page, showing how to bypass GM's anti-theft system used in many early 90's vehicles. 6:1 with a set of COMP Magnum rockers, bumping the valve lift delivered by our cam from 0. I understand the Vortec 5. Modified fuel, spark tables and timing compensation at all areas of throttle angle. Coil Packs vs. 473" intake / 0. com 1-800-456-0211. Camshaft Lift (in): 0. Discussion in 'The Hokey Ass Message Board' started by v8nova64, Apr 28, 2012. Its cylinder heads and block were cast iron, it received fuel through a multi-point fuel injection system and its components were compatible with all smaller engines in the Chevy first- generation small block family. Click the link for the discussion thread to learn more about alan91z28's 1988 Camaro Sport Coupe. That said, just did (last summer) an L31 Vortec build on my 1998 K3500: 1) GM Goodwrench stock 4 bolt replacement short block. Small Block Hydraulic Flat Tappet. 1980 Sierra C15 Junkyard L31 Vortec 350 Summit K1107 488 510 Lift Cam Cold Start Rough Idle Chevrolet Cylinder Head Dyno Test. 050" lift and 0. There are some reports of early LT4's with 10mm top threads. Used on LT1 and L99. It's now called the LT4 Hot cam. Needs upgraded exhaust and programmer or chip. o scale train buildings, Hobbylinc carries over 300 o scale model railroad buildings at discounts up to 40%. The following change may be necessary for correct engine assembly: For LT1 and L98 engines (pre-1996) the dowel pin in the end of the camshaft must be pushed in so extension from end of cam. 050 with 462/482 lift and has a 110 L/S. 11 to 1 compression. 7L LS1 V8 engine was produced by General Motors for use in high-performance vehicles such as the Chevrolet Camaro and Corvette, among others. 00" stainless intake, 1. Quick View. LS1 Hotcam vs. The T-stat housing on a Gen III (LS-style) engine is the - RPM Custom LT1 AFM Delete Camshaft Package (Includes - RPM Custom Spec'd Comp Cam w/ Increased Fuel Flow Lobe, Brian Tooley Racing Dual Valve Spring Kit, Brian Tooley Racing Hardened Pushrods, ARP Head Stud Kit, Katech C5R Timing Chain, GM LS7 Lifters w. LT4 Supercharged 6. The success of these heads cause every Chevy cylinder head with the double hump casting identifier to be referred to as fuelie heads for an entire generation of hot rodders. of torque with Chevrolet Performance's high-performance heads-and-cam kit. If you're looking for turn-key power and performance, you've come to the right place. Although i have not performed the hot cam install, i too have a 95 z28 lt1 and plan to perform the swap this winter while the car is garaged. Ex: the marine intake. 7L (350ci) for road racing and street performance, this cam has found its way into the older carburated Small Block Chevrolet's as the preferred performance power upgrade for those desiring a GM designed camshaft. 1996 Corvette LT4, Magnaflow catback, Descreened MAF, Throttle body coolant bypass, 4. 479" lift, 115* LSA, 116* ICL, running a ported stock intake manifold, 70mm throttle body, LT1 B-car exhaust manifolds into the factor dual 2. Click now!. And it's Torque range is down Lower were it is needed on the street. l31 : 409 cid v8 400hp (special high performance-solid lifter cam) L32 : ENGINE, GAS, 6 CYL, 3. This combination, along with the Duntov solid lifter cam, produced 360hp or 340hp with the single Carter 4-bbl carburetor. it made good power driving around. 93-97 Camaro or Firebird LT1 and LT4 Camshafts, Comp. Displacement is 5. 015 gasket to up compression to 10. In my example I used the old trashed ones that came with a 500 Caddy I came across. I knew it wasn't running to its fullest potential. ZZ4 forged crank & rods H3445NCP-40 pistons,. Every vehicle performs differently, and we realize that a standard cookie-cutter tune or handheld programmer won't always work well for everybody. Milestones: - April 2008: prototype 24x reluctor is made - May 2008: gen1 small block engine running on test stand - July 2008: LT1 engine running coil per cylinder on test stand with LS1 f-body calibration - September 2008: gen1 small block. View; 12 / 24 / All Small Block Hydraulic Roller. About 8K miles ago i did a complete tune up with new delco iridium plugs, and plug wires, cap and rotor, coil and ignition module all from performance distributors, their firepower ignition kit I also have an LT4 Hot Cam, new upgraded felpro intake gasket kit, new timing cover, sanderson 1 3/4 primary 3" collector swap headers, corvette HD. Run on the dyno with the stock cam using the Speedmaster. I've been doing a little searching and don't know squat about cams. '62 Impala Page has a lot of info on my LT1 swap. The engine being installed is a Chevy 302 built with a '98 350 4 bolt block, 5. if you dont want to go the beehive spring route, you can buy the tool to machine your guides. Comp Cam for Camaro/Firebird 93-97 LT1/LT4 engines, call for custom applications, shipping is not included. Camshaft, TPIS Super L98 Hydraulic Roller Camshaft, SBC 87-92, LT1 93-94. Holley carburetors powered every Monster Energy NASCAR® Cup team and nearly every NHRA® Pro-Stock champion for four decades. In the previous story we introduced you to budget-buildup artist Tim Moore s 355ci small-block featuring its stock Vortec iron heads, GM Performance Parts HOT cam, and 9. If you're looking for turn-key power and performance, you've come to the right place. I don't want to get over 220 duration intake OR exhaust. See what makes SD Parts stand apart from the competition today! SDParts. According to the dyno chart, the LT4 produces 457 lb-ft of torque just off idle and 625 lb-ft by 2,800 rpm. LT4 HotCam kit build/dyno I wanted a 300-350rwhp nice summer driver so here's what my 95 Z28 got: LT4 HC kit with 1:6 RR's, mid length headers, k&n intake filter, new plugs wires and opti cap and rotor, msd coil and the LT4 knock sensor module. 0L engine 317 or 241 heads within the Internal Engine forums, part of the LSx Technical Help Section category; hello, here is what i have: 99 s-10 5. Re: L31 350 cam/intake choice I built nearly the exact same thing-stock block unbored, hot cam kit, RPM intake (vortec pattern of course), screw in studs even. However, you can generally figure on about a 20. Originally designed by Chevrolet Racing for the 1996 LT4 Fuel Injected 5. With that the Edelbrock Performer EPS intake manifold has a runner design that's "tuned" for peak torque at 3500 rpm on a 350-inch engine making it ideal for power from off-idle to 5500 rpm. Our full-roller camshaft kit for iron cylinder heads reuses stock head studs and fits under the stock valve covers. If You Are Looking For A High Performance Dyno-Tuned Engine, Give CHP A Call To Chat With An Expert. of torque for more performance where you need it most. I need to see what my car is putting down on a dyno soon also before I put heads and an intake on so I can get a basline. This Mustang Dyno has been verified to be 10% lower than a Dynojet. It can be used confidently at power levels of 350 to 375 hp for early cranks to about 425 hp for one-piece rear main seal cranks. 454 lift cam. There are a bunch of reviews and articles on line on that exact build and they make 400hp all day and are very street able. Black Bear Performance offers in-person and mail order computer tuning for your GM car, truck, or SUV with a twist. The block was decked. Quick View. F-Body Specific (93-97 Camaro and. Coil Packs vs. Here is an area where there is a tremendous amount of potential for success and also failure. I knew it wasn't running to its fullest potential. 525" lift with 1. hello guys, my setup is 96 LT1, Eagle 383, Golen LT4 heads and ported intake manifold, EFI connection EARLY design 24x with 58mm DBW throttle body, Ford 30 lbs skinny red top injectors, Hedmann shorty headers, 3" magnaflow exhaust. And it's Torque range is down Lower were it is needed on the street. Buy Performance Engine on eBay now! Engine 3. We caught up with Will Philippin, one of the Chevrolet Performance engineers who was integral to the project, to learn more about the power plant. I built a similar engine, Standard bore 4 bolt roller truck block, stock crank and rods. 5 ratio rockers-Lt4 Hot cam-750cfm carb-dual plane high flow manifold-large tube headers with mufflers-flat top pistons and. That and something I can take advantage of my 3200 stall converter, long tube headers & 4:10 gears. Distributor for Eaton superchargers in the United States. 5 rockers), at best, you might see 20-25 hp gain if you are not going to use the 1. NOTE: The LT4 camshaft P/N 24502586 was designed to be used in many different engines. Best of all, you get an engine that is both durability-tested and dyno-proven. Includes your choice of four stock piston safe camshafts and 1. F-Body Specific (93-97 Camaro and. That's what I'm using on my L31 with a hot cam. This will give you the clearance you need for the LT4 Hot Cam with a 1. Find Chevrolet Performance LT4 Hot Cam Hydraulic Roller Camshafts 24502586. 5 ratio 10212810 - Valve Stem Seal ZZ4, Fast Burn 385, L98, LT4, L30, L31 Vortec heads,GMPP 290 HP engine- 1 Per Package Intake or ExhaustMPR has built Two engines for me and I strongly recommend MPR Racing Engines to all of my. 0L V8 Barra 220 5. The LT4 was a special high-performance version of the new-generation LT1. If You Are Looking For A High Performance Dyno-Tuned Engine, Give CHP A Call To Chat With An Expert. top 10 sbc cylinder head brands and get free shipping with hot blade brands and get free shipping. Those are some awesome numbers! I also am running a hot cam, 1. 0 in the 1/4 mile. Sure, companies like Comp Cams, Crane, and Lunati can grind you a camshaft, custom or shelf, that can do a great job, it also depends on your combination of parts exactly. Another option is the LS6 beehive springs (GM part# 12499224) combined with Comp Cams 648-16 valve stem locks and 787-16 retainers.