L31 Vortec Cam Upgrade L31 Vortec Cam UpgradeEven if you were running a camshaft that was under the 0. 050 and 414/428 with 111 lsa, The reason i chose the xr276hr is thats what comp cams camquest suggested for a 4000lb vehicle with 9 to 1 cr, vortec heads,and has 1900-5600 rpm range, The vortec heads flow very well, almost as much as a set of edelbrock performer rpm …. ENGINE ASM, 350CID/330HP WITH VORTEC HEADS (1018) Corvette Performance Upgrades. 7L Vortec heads were the "hot tip" for small-blocks. Roller Lifter Install Kit for '87-'90 Blocks or '91-'02 Blocks can be purchased. Replacement camshaft for the SP350/357 crate engines. 1995 K1500 L31 Vortec long block install. 7L 350 CID (L31-R) and the 12677151 - Hydraulic Roller Camshaft - SP350/357 for $2385. JEGS Performance Replacement L31 Chevy Vortec 350 ci Crate Engine - 059-0282; Mr. $275 for Vortec 906 heads, beehive 3100II springs retainers. I wouldnt pay over $3000 for any intake setup, the only reason I have any different intake is because of the deal I got. 7L L31 Vortec 350 with 260K KMs on it (162,500 Mi). The key to a good crimp is quality crimpers. 050" This is the cam I have in my carbed L31 and it runs real strong, lots of torque in the low and mid range. This engine should make at least 425 horsepower at 6,500. LT4-powered models of this vintage (Camaro SLP/LT4 SS and Firebird SLP/LT4 Firehawk six-speed cars) utilize a cam with 203/210 degrees of lift. Fits 12691672 Vortec 350 L31 LD or 12691673 Vortec 350 L31 HD Truck Crate Engines; Provides all items from Level 1 Install Kit, PLUS: A water pump kit with gaskets, spark plug wire set, cap, rotor, and serpentine belt. Vehicle Upgrades; eCrate; COPO; Offers; Resources; Find Performance Dealer; Use with cam P/N 3927140 and all moderate-lift racing cams; and Iron Vortec Bowtie heads; Kit for 5. Conventional big block intake manifolds can be used with spacers (not included). ☑️ Best Cam For 350 With Vortec Heads: (Our Top Picks) ☑️ 1. Basic Operating RPM Range: Idle-6,000. You can buy a 4 bolt main Vortec 350 using p/n 12530283 (p/n 12530282 gets you 2 bolt mains-for about $30-$40 less). Up the cam 2 steps, still FT Hyd. And to NOT to have to put additives in the oil because of flat tappet cam. The reason I ask is becuase I have a 350 H. The 12200411 PCM can be installed into the 96 to 2000 GMT400 trucks simply by repining the PCM connector terminals. Insert Quotes Quotes Post Reply. SHOP ALL FUEL INJECTION! Edelbrock has been delivering the best combination of dyno proven electronic fuel injection performance for over 40 years. We also offer a Level 1 install kit for these engines. Chevy Crate Engine 10243880 Block 10 out of 10 based on 702 ratings. 7L - the "LS31", 24x CNP, LS2 coils, modified T56, 12200411PCM running COS3, zz4 cam, custom MPFI, etc. 6 rockers on the vortec heads you must enlarge the pushrod hole to 1/2 inch. hpt Here is a tune file i copy and pasted a lot of injector and transient parameters into. The ZZ4 350 Turn-Key crate engine has been one of our most popular high performance crate engines since we started GM Performance Parts. The LB4 was the first Vortec engine to employ multi-port fuel injection, and this engine was rated at 200 horsepower. 7L GM Marine Long Block Engine. If I had the 350 vortec heads and I am assuming they were 350 Vortec heads and I had to stick them on a 305 I would look for a cam that closed the intake valve very early to get some cylinder pressure back. This is a brand new Authentic General Motors heavy duty marine base engine. 020 valves and on the Vortec heads going to 2. Most 1999 GMT400 style trucks were not 1/2 tons, they were 3/4 and 1 tons. If you can find a good set of used Vortec heads that are not cracked a set of new valves, valve job and a little bowl work is all you need to put your 350 engine in the 12's. That is the 880 roller block used for 96 up L31 Vortec 350. Using a DTS water brake engine dyno, the Vortec TPI conversion twisted the needle to 305. Now,, go read this: Vortec SB Chevrolet Cylinder Head w/ Valve Spring Upgrade. In my opinion, this is a great ignition system upgrade. At that time, consumers wanted more fuel-efficient vehicles. Small Block Chevy 383 Stroker Kit. The Vortec Central Sequential Fuel Injection system utilizes a unique fuel injector for each cylinder. 7L V8] Part Number: 809-19432780. There's more to a cam upgrade than just the cam, and he'd likely I'm currently going through that endeavor with the L31 Vortec 350 in my '82. 585 Engine Camshaft Hydraulic Roller Lift Cam E-1840-P ls Camshaft Compatible for GM C. Possible Vortec L31 sticky. I have an elmscan 5 that I use with my laptop. Rotate the engine to 50 degrees before top dead center on cylinder one. 3 is a Small Block with 2 cylinder chopped off. On my 97 L31 Van that I repinned to an 0411 the center connector was merely two wires that looped back into the same connector. If this is the 260/290 HP crate,there are better options for you. We've got all of the accessories, brackets, and wiring out of the way, tomorrow the heads are coming off and going to the machine shop to get checked and surfaced if needed. Basically a 4 bolt Vortec 350 with a roller cam. GM VORTEC CSFI to MPFI CONVERSION. 6 rockers on stock Vortec roller cam. 25:1 nominal Compression that the 67-70 350 had with 64cc chamber heads which the Vortecs also have. I looked around and found the stock L31 cam specs, which are: Intake lift-. The wiring is slightly different between the 96, 97, and 98 to 2000 trucks. The L31-R has a plastic timing cover with a different shape and bolt pattern. Firstly, my reasons for doing this: I just put a new crate engine in it last summer and I'm trying to keep everything in good condition to make this truck last another 300,000 miles, the original. Big Block, LS, LSX, LT, Circle Track and COPO crate engines, giving enthusiasts more choices for powering their projects. This engine is an upgrade for 1996-2000 Chevy trucks with a Vortec 350. 0L camshaft does not have a fuel pump lobe. Mild cam L31 vortec head install. Duration at 050 inch Lift: 215 int. Engine Blocks and Components; Corvette Cargo Management. Hi guys, we pulled out the engine on the 1996 Yukon. Monitor it in ScanTool Dashboard graph. Every engine custom-built (no assembly line) by professionals. Shipping is free, but there is a delivery fee for residential addresses. Put the 1996 Vortec EP381 pump back in. 7L Vortec Engine Listings. I don't know the history of this truck, other than it was a fleet truck for a rural cable company for a large part of it's life. When I plugged in the specs off the Summit cam card, the 8800 was down about 10 ft/lbs at 1,500 rpm but up 10 hp at 5,500. JEGS 513002 single four-barrel low-rise dual-plane intake manifold is designed for 1996-2002 Chevrolet 350 Vortec engines. The Comp Cams 268 made the best power. This engine was designed as a direct replacement for 1996-2000 Chevy & GMC pickups, SUV's, and van applications. you can kinda see them at the very bottom of this pic: 1996 c1500 gen1e 5. The new single plane EFI (Electronic Fuel Injection) intake manifold is designed to provide a broad RPM powerband for high-performance street/strip engine applications to a maximum engine speed of 7500 RPM. The L31 Cam likes a 2200 stall and the XE268 a 2800 stall if you are running an auto. Jul 11, 2018 L31 towing cam upgrade. 48 inch stroke, or the length a piston moves between top and bottom dead center. 7 Vortec Hot Cam: Chevy 24502586K1. It should be a mid 90s crate truck replacement motor based on the head casting number. Replaced World Products 305 S/R Torquer heads with '96 - '97 Chevy truck L31 Vortec cast iron heads, GM P/N 12558060. The block will accept a roller cam as it has the bosses in the lifter valley that are already drilled and tapped but it has a flat tappet cam. Blueprint for a Budget Small Block Chevy Build. You can pick up a brand new L31/Vortec engine for about $2000. At 7000-7500K the 185's are too small. The BenchForce™ PowerBlock uses EFI# 100-01072. The engine had a bore and stroke of 4. The air filter is easily removed, cleaned, and reused. 350 club : Vortec 350 (L31). 50-inch valve package in an attempt to keep the price down. Shop Now at the Guaranteed Lowest Price! Early Gift Deals - Up to $499 Off Select JEGS Brand Products! Camshaft Specs: Camshaft: Hydraulic roller; Cam …. upgrade to L31 'VIN R' Vortec heads & cam">L05 'VIN K' upgrade to L31 'VIN R' Vortec heads & cam. 6s, Tri-Y headers, stock 1-ton cats, muffler, and exhaust, through a 4L80E and 3. 2L truck engines from 1997 through Gen IV are still very much members of the LS engine family. Chevrolet Performance Hydraulic Roller Camshafts 14097395. Curving the Hei 16+ 21 @ 3000 , Tuning the QJet , 42/70 , M hanger DR rods, 5/8th door tension. I do get some tapping noise only when temps are below freezing but goes away after a minute. Eliminator is too, but my point was that the Bahner name is nothing to put second to Eliminator. 1x GM HD 350 Vortec L31 Crate Engine. 68 out of 5 Iron/Steel Sprockets, Chevy, 350, L31, Set. Carbureted Vortec 350 Daily Driver. MUCH better pump than the EP386 TBI pump. If you buy a used LT1 cam, make sure the lobes are not worn, and measure the lift. (from the ad) Lunati Cam: 261/267 with 112 separation part# 10120701. the springs are the same, factory springs used in the 193/191 heads. We already have some parts for it. Its a baby hotcam designed for a L31. 3 Vortec Performance Mods. I have never screwed with timing curves for low compression vortec heads. - Plan on doing separate threads in this section as I am seeing some others post here asking questions. 73 - L31 - 0411 pcm - 24x cnp ignition - shorty headers - K&N CAI - upgraded delphi Spider injectors. The LT1 develops (on an engine dyno) max power at 5000 rpm, per GM literature. 3 and 300 hp or 330hp vortec. Marketed as the “Vortec 5700” engine, but known internally by the moniker of L31, this engine was used primarily in GM vans and trucks until. Chevrolet Performance GM Replacement Small Block Chevy Crate Engine [1996-2002 L31 LD Vortec 350 ci/5. The Vortec L31 engine is a "traditional" 5. 3600 lb daily driver I would probably look for a 212-218 @. replacing the the engine in my c10 with a l31 vortec crate engine with Edelbrock performer intake, sniper EFI, and MSD pro-billet HEI. Whats the best mild cam for a stock 98 Vortec 350? Don't really want a lope idle, but want a cam that adds more horsepower and torque than stock. I'd say the goal would be around 350 wheel horsepower. These production Vortec heads were used in the new Vortec 350ci engine intended. Used (normal wear), I have 2 Chevy L31 Vortec 350 roller camshafts for sale. Don't forget to like, comment, subscribe, and follow me on instagram!IG: KI_Motorsports. Chevy V8's with 1996 and later Vortec (L31) cast iron or the Edelbrock E-Tec aluminum heads. Premium longblock with timing cover and oil pan installed. It does, however, require a specific intake manifold (A 5. whats the in this thread in this sub-forum in the entire site. here is a set of 1996-99 truck or 1996-2000SUV or 1996-2002 van Vortec L30/L31 exhaust manifolds. Specs on engine build in progress: 97 L31 Vortec engine, stock bottom end 9. Thanks for filling in the blanks regarding the style of tappets & cam. Dyno-tested with up to 50% more airflow than restrictive factory box air filter and intake tube. 7 Vortec crate engine by 45 percent. You will need to use the Comp 787 retainers. The guides need reworked for high lift performance cams. 8L engine that was released in 1999 was the LR4 engine and can be identified by having a V as the 8th digit of the VIN. A simple 30-degree back-cut on the Edelbrock intake valves was worth as much as 12 cfm at 0. The intake and exhaust ports are very similar to the 1992-1995 Corvette 350 LT1 heads. 030-inch over Vortec 350 with four-bolt mains. Plan the layout of the harness before getting to the car. P526S Accel U-Groove “SHORTY” Double Platinum Header Plugs approximately 3/16" shorter then R44LTS plugs, set of 8. Chevrolet Performance Hydraulic Roller Camshafts 14097395">Chevrolet Performance Hydraulic Roller Camshafts 14097395. The 120-degree cam minimized torque production through most of the curve, while the 112-degree cam offered more torque but slightly less peak power. Our upgrades were applied to an original (and zero mile!) LB9, but replacing the stock heads, cam, and intake can be performed with equal (possibly better) results on any of the many carbureted 305s. 71 replacement engine from JEGS High Performance!. The AirGaps designed open air space separates the runners to keep the hot engine oil away resulting in a cooler, denser charge for more performance. In addition to roller cam provisions, within the Gen I engines you also have the earlier 2 piece rear main seal and the later 1 piece rear main seal, and you need to know which one you. 7  with the later vortec heads is this the correct manifold to …. You may use the form to contact me, but if you found my website by a link from Facebook or other social media, I suggest you comment or message me there for faster response. If you really have to have the extra HP just do a cam swap but I think you will be surprised at the power of the L31-R with a 4 barrel carb and good exhaust. Camshaft Specs: Camshaft: Hydraulic roller; Cam Duration @. 7 Heads/Cam advice for my 1999 K2500 Suburban">L31 Vortec 5. They came from 1996 to 2002 Vortec 305 or 350 (they use the same cam). Any advice on upgrading the stock factory MAF sensor on a 97 Chevy 5. What GM create engine to buy for 3/4 ton 72 C20. 5 arm LSA 117 this is hotter than the L31 cam but the wide LSA keeps idle vacuum high making this cam very computer friendly with an idle that is milder sounding than the cam timing would make you think. 7L L31 vortec with only upgrade being a ZZ4 cam. 5 so I think we'll be good as long as its also available thru the 411 pcm (with a 01-02 L31 express van file base) Thanks for the help Paul!. Choosing an Automatic Transmission for Your LS Swap. The new stuff just works that much better. The LT4 hotcam's specs are always advertised using 1. the ramjet 350 and ht383 crate engine cam is. 42 rear gear, stick with the stock Vortec 350 cam or Ramjet 350/HT383 camshaft. Im going carb with a 200-4r and stock stall, 342 rear 26" tires. Another good choice for EFI engines is the LT1 p/n 12551705 with specs of 201/208 degrees at. See all 13 photos 13 photos 11. Intake Valve Lift with Factory Rocker Arm Ratio: 0. When you get down to what the OP is doing; that is using the stock timing L31 Vortec cam is pretty mild it is roughly equivalent to the pre 1987 standard production 305, 327, 350 cam. Granatelli Motor Sports® - Black Mass Air Flow Sensor with Cold Air Tuning 350113-C $420. The 0411 is a 512kb PCM that allows for a higher rev limit than the above 96-00 Vortec 305/350/454 rpo L30/L31/L29 "blackbox" PCM which has a hard RPM limit of 6000rpm which can be raised from the stock 305/350 5600rpm defuel/5400rpm refuel and the stock BBC L29 rev limit of 5000rpm defuel/4800rpm refuel, but no matter how high an …. Chevrolet Performance Vortec Cylinder Heads 12691728 Cylinder Head, Vortec, Assembled, Cast Iron, 64cc Chamber, 170cc Intake Runner, Chevy, Small Block, Each Part Number: NAL-12691728. The cam sounds right, these engines came with the iron Vortec heads and the heads do not tolerate a lot of lift as is - with a minor massage, they are supposed to be good for >. The L31 GM Vortec heads just weren't simply upgrades to existing heads, and these were a total reinvention based on the 1996 Caprice/Impala SS LT1 cast-iron head castings. I saw a test that showed 20+ lb/ft torque increases at a low 2500rpm on a BBC on an engine dyno. Top 10 Best L31 Vortec Cam Upgrade Reviews & Comparison …. Heads and camshaft is where power is made with the SBC. 10243880 (common casting number of a 5. Fel-Pro Intake Gasket Set - MS95580. 6 roller rockers, as I have a good set of GM roller lifters and dog bones and. It features a camshaft, solid filters, and a carburetor specifically designed with an aluminum intake. This engine is not intended for marine. The oil pan must be torqued in a step sequence. 018" Embossed Steel Shim head gasket (1962-1980's) you will have the same 10. Got a L31 350 vortec motor yesterday - havent dropped pan but assuming all is good - wondering what cam - I found the GM got cam ending in . Engine Parts: Small Block Vortec Cylinder Heads. This kit will make 9-10 PSI on a stock vortec 350 and is designed to fit all 96-02 1500,2500,3500 trucks both 2 and 4WD. the hp is 255 for the L31 and 260 for the LT1. My stock poppet spider was set at 23. Vortec heads 280H cam, TH400/2400 stall converter and 10 bolt/3. 7 Chevy Vortec exhaust manifolds. These Rotating Assemblies are Completely Balanced at Motorsports Unlimited using our state of the art, CWT Industries Multi-Bal 5500. Instead of dealing with the old engine, I went and pulled another L31 out of a surburban with only 119k miles on it. He will just need an 8 bolt vortec style intake rather than the std 12 bolt intake. All that I have done to it is stick in a K & N Filter (which actually did raise my mileage by 3/4 of a gallon, to my surprise) and stick true dual exhaust on it with glass packs and tips. These like high manifold vacuum as seen at idle the 115 degree LSA provides that. Chevy 383 Vortec High Performance Balanced Crate Engine. Chevrolet Performance's HT383E crate engine is an affordable and more powerful direct replacement for the tired 350 engine in your 1996-99 full-size GM truck or SUV. com FREE DELIVERY possible on eligible purchases. JEGS 80521 - Valve Spring Compressor [Stud Mount] 24574683-10Complete head with valves, and springsNo cams or cam View Full Product Description. Common GM Transmissions that work with a Vortec or LS Motor Although a Generation III Vortec or LS motor was not offered in vehicles until 1997, to better understand the transmissions available with them, we start back in 1982 with the introduction of the 700R4 transmission. One version had an Inconel exhaust seat with single angle valve grind and was available on 1 ton trucks. Several years back I read a Hot Rod article where they tried 3 different cams with the Vortec heads. Each kit is custom assembled using parts based on your engine’s requirements. Reaching for more power vs maintaining some measure of economy is almost always a direct trade off. The cam is also a great upgrade for the Vortec engine is your vortec had a factory roller cam. On my old vortec before I sold it for a new build I did not have to run that much initial timing and if your keeping everything stock then 12 degrees should be plenty. 7 motor and tranny out of the same truck just different years. Summit Racing™ Vortec Cylinder Heads SUM. The engine has 132,000 miles on it and I don't feel like swapping it. The cam you were given may be a "peanut" cam, meaning low lift and low power. The following year, Chevy introduced the L98, a genuinely modern fuel-injected engine that looked the part. I have a brand new L31 crate motor in my truck, and I was playing around with Summit's compression calculator. The L31 cam also uses more lift than the 929 cam. The cylinder heads feature combustion chambers and intake ports very similar to those of the LT1 V8, but without the reverse-flow cooling. Get a roller block 350 build with 193 swirl port heads use the L31 Vortec cam Install an aftermarket self learning TBI Use a Performer intake Recurve the HEI to be all in by 2500 replace the 2. 540" max lift, drop-in valve spring kit for GM L31 Vortec Cylinder Heads This COMP Cams Valve Spring Kit is designed to maximize the potential of GM L31 Vortec cylinder heads when using a hydraulic roller camshaft. Engine runs excellent with 210k on the clock. Whether this was a TBI upgraded with Vortec heads and intake or an L31 downgraded with a factory flat-tappet cam actually mattered not for our test. The L31-R is a 3/4 ton motor and has the torque to move your truck. You can port the factory lower intake or convert to the L31 marine intake. Three Ways to Pick Up Power with Your 350 Chevy Engine. Although it is a truck engine, it used cylinder heads closely related to the LS2 and LS6. The biggest hurdle is accommodating valve lifts above 0. Next, rotate the distributor until both LED lights illuminate. I think I found the pid for adjusting the can retard , but wanted to verify. kylenautique; Aug 6, 2023; Towing; 2 3. 96-2000 chevy and GMC trucks, were the only ones to use actual vortec engines. Make sure all oil film is removed on each gasket surface and this is done at 70 degrees or higher. This is a dual plane intake manifold with an estimated RPM range of 1,000-6,000 RPMs (I could change the base manifold to be a 1,500-6,500 RPM manifold in the future). L31 350 VORTEC PERFORMANCE OPTIONS / CAM PISTON UPGRADE. Just cause they're different motors, dosen't mean things won't exchange out. 1 2 Next flatline11596 Discussion starter · #2 · Feb 6, 2010 i forgot looking to make between 300 and 350 hp Reply Save Maverick2664 · #3 · Feb 6, 2010 i think the l31's were vortec's so keep the heads you have and DO NOT port them, call up comp cams for what cam you need, if its TBI i heard you only have 1 cam that will work. 95 S10 extended cab,lowered 3", 480+ horse 383,edelbrock etec 200's,vortech V-2 and meth injection on the way NV3500 ford 9", 3. Behind the engine there is a TH400 trans, bue I don't know the stall of. This Dart's version of the GM L31, Vortec. OBS Intake Gasket Replacement (many pics). From a purely technical standpoint, the most recent version of the Chevy 350 would naturally be the best of the bunch. Get the Best Performance with Chevrolet Performance GM Replacement Small Block Chevy Crate Engine [1996-2002 L31 HD Vortec 350 ci/5. At 1,500 rpm the 08-409-8 cam is about 5 ft/lbs stronger than the 08-500-8. I am still early in the testing stage. Thread starter ace4z28; Start date Sep 17, 2008; Sep 17, 2008 #1 A. Quick Navigation GM V8 Tuning - Miscellaneous Top. 5 Best Performance Cam For 5. With this cam, a set of Vortec heads, a tall dual plane intake manifold, a 650 to 750 cfm Holley carburetor, I'm looking to upgrade the cam in my stock L31 vortec SBC. Run the L31 block and heads, use the tried and true Comp 268hr or the 276hr. There are reports of some shops getting close to 300 cfm out of these heads in fully-ported form. Engine comes with a one year, unlimited mileage written warranty. The Vortec iron small-block Chevy head offer 1. To reach your economy and cruise goals with that 2. JEGS 513002 - Intake Manifold for 1996-2002 Small Block Chevy 350 Vortec with L31 Cast Iron Heads, Dual Plane [Satin] $161. I figured I would post up on some part numbers and such that I ran into during the swap. Crisp and responsive from a cam upgrade is easy, not going bankrupt @ the pump is a bit more complicated. The L31 develops 255 hp at 4600 rpm, also per GM literature. Center-bolt valve covers and self-aligning rocker arms are also needed. Cam and Lifters, Hydraulic Roller Tappet, Advertised Duration 278/284, Lift. New GEN 1 SBC crate engine from GM 357hp/350. 560 lift SBC at the best online prices at eBay! Free shipping for many products! GM GEN III IV 4. Stock spider runs around 98% duty cycle at 5,000 rpm. Swap a $250 roller cam in it along with a $150 set of drop-in valve springs and it'll make about 400 Gross HP and that cam has an eccentric for mech fuel pump. He will also need the vortec style self alinging rocker arms and center bolt valve covers. i know someone who is using old stock vortec heads, a crane energizer. 7 vortec Truck tune 90 OCT intake swap starter tune no ltft Maf. As well as a '87+ OE-Style COMP Hyd. Xtreme Energy XE268H-10As run with Vortec heads, the XE268 cam made more than 400 lb-ft from 3,600 to 4,600 rpm and more than 350 hp from 4,600 to 6,200 rpm. Technical Specifications: No filter cleaning required for up to 100,000 miles. LT1 Cam in L31 (Vortec 350). 3 Vortec, the right set of cams will easily net 25-100 whp by themselves. ZZ4 cam worth increase in performance?. Don't know much about cams so any help is greatly appreciated, thank you. Vortec heads PN SD8060A: ($319. Outside Diameter of Outer Spring (in. Is this additional duration under 0. but is the same casting as any '87 …. All can be bought used for under $100 and with a. If you keep the stock heads and low compression (8. It is a longer-stroked by 9 mm (0. Intake Manifold, Vortec Head Design. Hydraulic cam; Quadrajet carburetor, power output of 300 hp and 380 lb⋅ft (515 N⋅m) torque; 10. With its shorter duration and tighter LSA makes noticeably more low-end torque than the LT4 hotcam. The Evolution of the Vortec Truck Engine. While this new engine is out I'm going to re-gasket the entire thing and was thinking about slapping. At highway speed usually you could not tell there was a. You can snag a used vortec L31 cam (same thing as 350 B Body LT1 cam) or even better is a used 1994-1997 LT1 Z28 cam. Also that it has press in rocker arm studs. You can reuse the stock roller lifter which is the great thing about them. 7L rpo L31 VIN code R - Price party's over. L31 Vortec rocker arm stud info. Choosing a Camshaft, L31 engine. The only one that wasn't machined DID NOT have a block off plate. ) I haven't quite worked out the intake manifold yet, but I love the …. These vehicles introduced the L31 5. If installed in one of these trucks, a custom computer re-program is needed. CAMSHAFT SPECIFICATIONS ALL NEW castings. 050 lift (intake/exhaust) is 214/224 degrees, and the valve. 7 L Vortec L31 Torque Monster Build Suggestions. Cast-iron Vortec Cylinder Head Assembly. Cam/Crank Timing Marks on L31 SBC. As a result only a Vortec manifold can. 6s on it, it will see a slight duration increase at the valves. For a street smallblock, the E-tec 170 is a great choice. Patterned from the design of the LT1 cylinder heads from the 1992-96 Corvette, the Vortec iron heads were first used on the fuel injected 1996 pickup truck RP0 Code L31. They're perfect for those wanting to upgrade to hydraulic roller cams. L31 350 Vortec DynoLightly Moded DD. 7 Vortec crate engine features factory specs of 255 horsepower and 330 ft. 480” lift cut the guides down to clear the retainers. A few 95 TBI motors also got the 880 block. The setup is a 0411 pcm swapped 97 silverado, 5. Valve springs are one of the most critical and overlooked components in your engine. Stud, Chevy, 305, 350, Set of 16. 6 crane cams true roller rockers. The Vortec HD version 350 uses a 4-Bolt main block, upgraded exhaust valves and cylinder heads for heavy duty applications. The cam change resulted in a huge increase of 53 HP. Start your SBC rebuild off with a solid foundation, Summit Racing offers many 383 stroker kit rotating assemblies to meet your engine build specifications. 6 rockers, mpfi upgrade, cai, long tube headers ,true dual exhaust getting ready for the turbo. I have a RamJet 350 in my '55 Belair. Vortec camshaft retard offset. Exhaust Valve Lift with Factory Rocker Arm Ratio:. Post by v8famvan » Fri Mar 25, 2011 4:54 am. Chevrolet Performance Hydraulic Roller Camshafts 12677151. L31 applications: Express/GMC Savana full-size vans, …. hello, I have a 97 Vortec engine that I am going to overhaul, I am wondering if anyone could shed some light on what would be the best upgrades to do but also be able to use the stock intake/ spider injection. The forum posts confirm that people are asking about GMT400 upgrades. I have the opportunity to get a complete L31 vortec motor. This is now my hotrod truck, and its in great shape: has relatively new 4L60e Goodwrench rebuilt tranny; with stock 3:73, I just put a new L31R crate longblock in with stock intake. They installed a takeout marine cam from a machine shop. 73:1 (guess) 10-bolt rear end with 60,000 miles on the car now. You can pick up ALOT from the stock tune. 125" bore and it is not much more than reconditioning a factory 880 block. SBC 350 L31 Cam Selection. planning to use the s10 converter, vmaxx manifold spacer, open exhaust, injector upgrade for the basics. stonebreaker · #3 · Jan 1, 2011. 4L/L29 cylinder heads being the "hot tip" for big-blocks the same way the 5. If original, it should have #906, or,062 Vortec heads. Luckily, the Vortec 7400 is incredibly sturdy and stout. SP350/357 Base Engine (19367080) Specifications. Hi all - Im seriously considering a L31 vortec roller swap this weekend. Contact us · Privacy policy · Help/Rules · RSS. 350 vortec motors! I was able to upgrade my fuel injectors to MPI’s and man does my 96 1500 run like a SOB! Excellent performance at 35-65 mph. 465 cam but I'd at least I would have the capability to upgrade my cam down the road and take advantage of the bigger 2. Those numbers are for the non-TPI 5. This is primarily attributed to the high port flow in the. Free Shipping on New L31 Vortec HD 350 Crate Engine. Looking for a tune file for a L31 Vortec 350 with an LT4 Hot Cam …. Angled spark plugs (5/8" hex, 3/4" reach, tapered plugs) 1. 357 HP @5500 RPM 407 LB-FT @4000 RPM Camshaft Type (P/N 12677151): Hydraulic roller Camshaft Lift (in): 0. The L31 series engine was the motor that was selected to move GM into the future. Lunati Bracket Master Plus Roller Timing Set - 92126. Chevrolet Performance 350 Vortec C. In 1996, Chevrolet added Vortec heads to their 5. It was designed for use with larger pickup trucks. Calderone Discussion starter · Feb 21, 2016. 96+ Vortec Performance + Computer Swaps. Vehicle/Engine Search Vehicle/Engine Search Make/Model Search. I am going to dig out some old dyno graphs and look them over but so far the 350 only made. If lifters and timing chain set are needed, see link below:. We would like to show you a description here but the site won’t allow us. with vortec heads and I wanted to make a upgrade to my cam and get some more HP. 050" - 196 Lobe Centerline- 111 Is there a good factory cam that would be a good replacement out there, maybe an LT1 cam? I know of an LT4 hotcam available locally, but I think that might be a. Over 500 K kilometers not sure if engine has been replaced. I suppose if you used the lowest lift factory cam, you might pull it off- but even then it would still make good torque. Ask Away! with Jeff Smith: The Great 5. Yes, works with self aligning rockers as well as heads w/ screw in studs and guide plates and std, non self aligning rockers. This top end makeover also brought a redesigned fuel delivery system known as a Central Sequential Fuel. Shop Now at the Guaranteed Lowest Price!. It can be converted to traditional push rod guiding with after market steel. small block GM style stroker crate engine kit for 1996 - 2000 Chevy pick ups and SUV's. Since the crate engine is about $2080 and a new roller cam is about $500, I would spend about $2600 to get started. If power is the goal in your build, you will be far better off with a set of L30 305 Vortec heads. Yet another set of Newbie questions. In essence, the Vortec head uses the iron LT1 chamber intake and exhaust ports in a standard-water-flow iron head. Enjoy banner ad-free browsing with Team Chevelle Plus. It is a pretty conservative cam for a 350 vortec, like others have mentioned you can build more power with a more aggressive cam, but I can attest to the fact that they idle nice and are very well behaved. Stronger from 4,300 rpm on up, the. Thanks for your comments and the article. compression and a grossly mild hydraulic cam, a stock LG4 '82 Camaro 305 wheezed out 145 net hp at 4,000 rpm and. The cam-driven water pump with reverse-flow cooling and OptiSpark ignition system were revolutionary. You will need to get some work done on the valve springs. 480” valve lift, 350-400 HP dependant on the CR, cam, ring seal, oil control, blah, blah, blah. LS SWAPS: Wiring Harness and Wiring Guide. L31 Vortec 350 from a 2000 GMC 2500 Van - I am going to clean it up and do marine gaskets in it. 7 Vortec motor camshaft: Why you should change your camshaft. Must verify standard thread starter, bellhousing, and motor mount bolts. 480" area and I have PAC1218 LS springs for the heads. 60-inch vales and 64cc combustion chambers and flow better than any other production iron small-block Chevy head. Exhaust Duration at 050 inch Lift: 223. Chevy V8's with 1996 and later Vortec (L31) cast iron or Edelbrock E-Tec aluminum heads.