L31 cam specs

 

Bryan Harley
l31 cam specs One is saying the camshaft sprocket must be within 2 degrees and the other is saying -6 degrees is well within limits. Distributor Drive Gear for a Vortec Once you start modding your heads for more lift and get a camshaft to match it that is a little more aggressive and all the Posted: Sat May 03, 2008 2:56 am Post subject: Factory cam specs please read/help. The Goodwrench 350/260 hp motor or the L31 vortec. I had to replace the distributor gear on my '97 350 vortec. My question is how is the L31 a better motor(I know it has the vortec heads and it flows way better) it is rated at 330 hp and 325 torque and the goodwrench 260 hp has 350 ft lbs torque. If I had such a car I would go straight to the body shop Memphisand I would customize it exactly the way I want. 160 is probably a 4. HT-HG are essentially the same engine with same basic components and 9. Camshaft selection is a very in-depth process. now my next Q, if i take the vortec cam an install it in a 88 305 will it boost the power, yes it is a roller cam block. Since the maximum rpm's are less, the horsepower is less. L31 Intake spacer versus marine intake blackbox PCM the trucks originally came with If running the stock camshaft((on a 350 or 383+ stroker) 5800+ rpm rev limits View 005 Chevy Vortec 5700 57 350 L31 V8 Swap Cam Engine Camshaft Timing Gear Chain Installation Crane - Photo 112158921 from Increased power for your 1996 to 2000 350ci Chevy Vortec 5700 V-8 engine The L31 was replaced by the 5. The GM HOT cam was designed around a 1. The 2002 model year was the final year for the L31 5. Here are the intake gaskets we mentioned in the text. 42 gear will the car run pretty good, i mean power if i hit the loud pedle. This engine comes factory fresh, manufactured using the latest in high tech computer controlled equipment and are GM engineered, tested and validated to deliver smooth, dependable The new L31 is a factory-spec rebuild, bored . 7 L31 Vortec engine. Most special order parts will generally ship from our warehouse within 48-72 hours but may take up to 7-10 business days based upon their availability from General Motors before shipping from our facility in North Carolina. If you go vortec and do a cam swap stay with a roller. Lunati Valve Springs are manufactured using chrome silicon valve spring wire and cutting-edge heat treatment processes. D. 3 L Vortec is primarily used in large SUVs and trucks. 7L L31 is the premier industrial workhorse, providing the power needed to get the job done without sacrificing fuel efficiency or durability. 050" 0. You can see 30-35hp and 40-50 lbs/ft on a stock aluminum head TPI Corvette engine and with the addition of 1. Vortec camshaft retard offset Hi gang, My buddy has messed with the distributor positon on his '99 Vortec, and the service manual says to connect the Tech 2 and look at the camshaft retard offset and adjust if necessary. I have some of the stock cam specs for my 1998 L31 (350), these come straight out of the GM Factory Manual 1) Exhaust Lift = . . Nothing compares to a Factory Original new GM Crate Engines when it is time to replace the worn out 350ci Vortec engine in your 1996 thru 2002 Chevrolet or GMC pick-up and Vans. 7L L31 Features & Specifications 5. 7 350, not a Vortec, my mechanic tells me that is a rock solid engine and I should be able to get 300,000 out of it with regular oil changes. This is the same platform used for producing many of the LS series engines that were for performance cars, such as Corvettes, but the 5. 3 use the "black" ECM, it's very capable of running the L31 almost any tranny GM offers, the only drawback is it's only capable of controlling a single electric fan. 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 . 414" Exhaust Lift- . 12569068 5. Search. Why is it that there is a circuit comparitor between the cam and crank sensors. 4305 (. At that time the camshaft retard was good, fuel system was good, never checked fuel pressure at that time. 550" Lift w/ 130 Lbs seat pressure Our Vortec kits are engineered specifically for Iron Vortec & 96 Iron LT1 heads. The lobe centerline is 112 degrees. 94/1. The camshaft can be likened to the "brain" of an engine's mechanical components. GM Engines 12681432 - Vortec 350 L31 New Crate Engine Free Shipping on a New 350 Chevy Engine From the Number 1 Chevrolet Performance Dealer in the World SDPC This engine comes with a 36 month/100k WARRANTY 350 c. 01" of the pin is extended from the front of the camshaft, The same as in the production part. GM#14097395 You can use this with the stock tune (and mostly all stock components) if necessary. 0 5. 7 L small block V-8 whose origins date back to 1955. I know I have a fuel evap code but I have a buddy scanning for new codes today. Isky's superior craftsmanship, plus the use of only the highest quality material, is your assurance of long cam life and years of trouble-free service. Level 1 indicates a good stock replacement camshaft. When you line up the 2 marks, The 1 on the timing cover and the 1 on the balancer is just a reference when you bring #1 pistion up on the compression. Ok im building an l31 350 looking for some suggestions on performance parts, like the cam, valve springs rocker arms and etc. Heres my situation. k&n air filter,march serpintine belt kit with polished a/c compressor and alternator. 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. Including a Large Selection of New, Used and Surplus Engines for Sale. 030 over 6qt. RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Bore, Stroke and Compression Ratio In 2002 the L31 had a bore of 4. L31 5. I have read many peoples opinions saying this timing is not adjustable. 5. 5 Rocker Ratio) The Chevrolet Performance Truck 350ci L31-R Long Block Assembly was designed as a direct replacement for 1996-2000 GM Full size Trucks and 1996 -2002 Full size Vans. 0 to a 5. Engine is a 10243880 block with the stock iron Vortec heads. Best Answer: Hydraulic roller cam and lifters. 00 inches and a stroke of 3. 7L GM mini-van, pick up or SUV, take a look at the ‘Applies To:’ box on the right and scroll with the next button to see all of the applications. ) [1] For LT1 and L98 engines 1995 and before, the dowel pin in the end of the camshaft must be pushed in so . Was thinking of changing the camshaft out. The Tahoe Limited had the big brakes, big alternator, 120mph Speedo(stock was 110-the RPO-Z56 2wd Police Pursuit Package Tahoe had a 130mph "Certified" speedo. The existing motor is getting tired and I'm looking to purchase a new Vortec long block through Pace Performance. I bought an Actron 9580 scanner to adjust the cam retard but I am not seeing that as a viewable parameter in the live data of the scanner. Showcasing L31 Hd Camshaft available for sale today! Crane Cams is the original leader in performance camshafts for street and race engines 1996 stock L31, We want to keep thing simple but the cam/head selection might be a bit difficult. However, a major factor in a performance engine's ability to produce power is the camshaft. 7L Vortec cylinder head is the best flowing production head Chevy has made for the Gen I SBC engine to date. I've initiated the process of installing the marine intake swap, 4L80E swap and the 0411 PCM upgrade on my whipple-supercharged '96 L31. 030 over. This GM LT4 aluminum 4-barrel intake manifold PN 24502574 is the same and the GM LT1 intake PN 24502592 except that it is configured for 1996 LT4 Engine Cam Specs: Would someone know what the cam specs are for these engines from the factory. It is a stroked (by 9 mm) version of the Vortec 4800 and replaced the 5700 L31. 7 etc. Specs are 201/208 duration @ . I suggest the camshaft that GM designed for the following engines: ramjet 350, HT383, & marine application 350. Hello my name in Jordan and im new to the forum. 4. I'm looking to put a replacement style GM truck engine in my '64 C10. Page 3 Introduction GM Performance Parts is committed to providing proven, innovative performance technology that is truly “More than just Power. 3 L 5300 LM7. stock compression on the L31 255hp stock and is 9:1 I believe, maybe 9. Could a moderator please make this a sticky. It controls the timing of a number of critical operations. I reused the factory 93 TBI heads and upgraded to a 454 throttle body with 350 injectors. Specifically, I am looking at their L31 type engines originally found in '96-00 Chevy full size trucks. 7L 350 L31 Vortec truck engine is found in thousands of 3/4 and 1 ton 1996-2002 Chevrolet and GMC pickups, Suburbans and full-size vans. I dont want to stroke it i already have a crankshaft, looking for cam and head info. 7 liter vortec engine and transmission along with computer all from a rolled 99 chevy Z71. Detailed Description: Elgin Hydraulic Roller Camshaft Premium materials and advanced engineering to deliver unbelievable powerat a great price. You would have to use different pistons though, because the 882 heads are 76cc's. Where the mechanics differ is the degree of tolorance allowed. The new L31 is a factory-spec rebuild, bored . 050-inch lift, 0. 1996 Chevy Vortec 5700 (L31) engine March 2010 Having owned this engine for several years I thought I would spend some time going through the loom and seeing if I can get it running for a bit of a challenge in picking through wiring looms. Jul 2, 2013 at 3:36 PM #10. thanks old bogie. The Vortec 5700 produces 255 hp to 350 hp at 4600 rpm and 330 lb·ft to 350 lb·ft of torque at 2800 rpm. thanks again. The only way to relearn or for better terms, set ignition timing, is using a scanner that reads camshaft retard degrees. This page is the start of an L31 swap into a 1986 Astro with 97K miles on it. Will the camshaft bind and gall in the towers? Will a bit of metal from the rebuild cause damage to a bearing? These and other potential catastrophes cross my mind before I turn the key and fire the L31 up for the first time. I've owned a 1995 K1500, L05 350 TBI since 1999. I currently run a stock 305 with the CCC and factory exhaust manifolds into a true dual system. lbs of torque carb to pan crate motor. The L31 is as installed SAE NET rated and the Ramjet is Gross HP. Inside the distributor is the camshaft position sensor. I don't want to machine the heads. 7 L31 engine for 1996-2000 GM pickups/vans. 7L) cam specs are 10241264 casting number Intake lift- . RamJet 350 camshaft I have a stock L31 vortec 350, that has 2000 miles on it now. 3 5. Showcasing L31 Hd Camshaft available for sale today! I have 350 chevy, I would love to add some power with a camshaft, checking the casting numbers I found : 10243880 for the block (not roller) 12558062 for the cyl heads According to some lectures, that block is used for an L31 vortec engine, and the same for the cyl heads. 5:1 rockers, or 0. This Vortec L29 L30 L31 L35 ECM programming harness requires Pass-Through Harness. So If you were looking at using the engine in a race car I would choose the LT1, but if you were looking to use the engine in a Truck ( towing etc. I plan to purchase a conversion intake manifold and retain my TBI. The L31 was the last engine to come out of the first-generation of Chevy small blocks. The L31 was replaced by the 5. 30+/-. Late model 1996-current Vortec 5. The 5. Valve Configuration. ” Valve Spring Kit for SB Chevy Vortec High Performance Hydraulic Roller Cams, up to . If it is not in the EXACT location it should be, it will cause problems. The truck is essentially stock, with only an aftermarket cat-back exhaust. 3L Vortec + 1 Cam = 42 Extra Horsepower How to Pull More Ponies and Pass Emissions. First thing we will do is put a set of 1 5/8 long tube headers. I am having problems on this PC uploading the graph. I have built older GM engines before, but I have never touched an L31, or any Vortec engine for that matter. 94 intake valve diameter simply will not allow the optimal intake valve open and exhaust valve close events to make the most usable power. Later on, you had a one piece rear main (different crank), roller camshaft, and no drilled hole for a mechanical fuel pump. Stock L31 cam specs: 191º/196º @ . Displacement. very helpfull. 30 +/-. 050 with . 700:1 static compression ratio we had with the L31 heads. 7L marine engine (one-piece rear main seal, roller cam and roller lifters). I would love to have a 1996 Chevy Cheyenne as well, especially since I love collecting old cars and this is what I do best. And they claim the stock Vortec programming can handle the extra cubes with the HT383. You must then set that to 0 10 people found this helpful. now can you tell the mph with 567 ft. Yukon. ) Chevy LS1 Hydraulic Roller Camshaft . Powered by GM Vortec 5. camshafts that are much cheaper than comp cams or the like. OBD2 Switch Assembly Pass-Through Harness ECU harnesses connect to the OBD2 switch assembly through a short pass-through harness. This motor has been professionally remanufactured to meet or exceed GM OEM marine engine stock specifications. Several things to check: 1- Disconnect harness connector from the camshaft position sensor. Make Liter CID Engine Model Year Rod Torque Main Torque Cylinder Head Bolt Torque ALLIS CHALMERS 1. Chevy 350 Replacement Parts Long considered one of the easiest engines to rebuild, the Chevy 350 is commonly modified for increased performance with a plethora of aftermarket parts, including high-performance intake and exhaust components. cab short bed 1500 with about 167,000 miles on a 5. 3L Vortec Engine Specs The 5. 7 Ltr - 350 C. This GM LT4 aluminum 4-barrel intake manifold PN 24502574 is the same and the GM LT1 intake PN 24502592 except that it is configured for 1996 LT4 chevy 350 vortec engine 96-00 4 bolt main truck applications Remanufactured and Rebuilt Engines for Cars and Trucks. After grinding the Isky Hi-Rev series camshaft profiles on high quality Proferal cast iron billets, they are flame hardened, super-finished and Parko Lubrite coated. The L31 Vortec 350 that was installed in all GM half ton trucks (Pick-ups, Tahoes, Suburbans, Vans) put out 255 hp and 330 lb-ft. here is a paste of the 1996 camshaft specs. 7 vortec engine. 50-inch intake/exhaust valves, straight spark plugs, and Vortec ports. These outstanding units have seen upwards of 20 intakes, and are still sealing well. - GM ENGINE - L31 New Every new or remanufactured Goodwrench engine is made to the same exacting engineering standards that go into every new GM vehicle. know any one at a gm store. 0:1 compression, although later HQ got the leaner idle 704 Quadrajet. I have a 95 with the 5. The right choice of block for L31 performance Note at the oil filter fitting the brass plug that has been pressed in. Vortec is a trademarked name for a line of small block engines for General Motors trucks. 3L vortec not a 5. Register • Search • FAQ • Memberlist • Usergroups • Log in GM Performance Forum Index » GM Performance Forum » L31 cam specs I've got a 99 Suburban with the L31 5. I purchased the production L31 with the hopes of doing a 4. 8. It is a cast-iron replacement head with 170 cc/64 cc runners and chambers, 1. 6 rockers you can expect even more. The vehicle has seen two differ mechanics, both mechanics agree the camshaft sprocket is running at negative 6 degrees. 7L L31 Tech Specs With the vortec heads and other L31 engine parts, I believe this is good for 290 - 300 HP depending on intake and carb. CLARIFICATION: Everyone consistently calls a Vortec an LS and that is not accurate! Although Vortec engines are "LS" based they are NOT LS engines IMO. I gather there was nothing special about the engine build for these L31 SS's would have been a standard cam, but personally I'd fit a mild hydraulic to suit your driving & gearing. ” All the Vortec engines use a hydraulic roller camshaft and lifters from the factory. Replacement GM Goodwrench Engines, Chevy Performance Crate Engines, Genuine GM Replacement Engines , Free Delivery Type. Use KB134 flat-tops to achieve the same 9. If possible i would like to use a summit racing or speedway camshaft under $150. If you took the bone stock L31, added the same dyno headers, same corrections, same accessories, it would pull around 330 HP and 380 ft/lbs of torque. 7 refurb. 48 inches. he right. with my combo the 700r4 an 3. The name first appeared in a 1984 advertisement for the 1985 model year 4. L31 308 specs: All I just noticed an anomaly with red 308's. lbs of tourqe sorry im new to this engine-brand new zz502 502hp- 567ft. 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. Double Overhead Camshafts, Chain Drive to Exhaust Cams, Secondary Chains from Exhaust to Intake Cams, Roller Finger followers with Hydraulic Lash Adjustment, Beehive Valve Springs Nothing compares to a Factory Original new GM Crate Engines when it is time to replace the worn out 350ci Vortec engine in your 1996 thru 2002 Chevrolet or GMC pick-up and Vans. Both used the second design cylinder head that flowed 30 percent better than the first. This particular cam is a great little upgrade for a TPI 305 or 350. 7L-350ci-V8 Engine Torque Specs. Factory Direct Equipment Brand New (NOT Reman) Vortec 350CID, for 3/4 & 1 ton trucks & vans with 6 or 8 lug wheels" 12569068 5. With the vortec heads and other L31 engine parts, I believe this is good for 290 - 300 HP depending on intake and carb. 480 I want to run . Stock L31 Vortec 350 (5. 6:1 roller rocker arm with specs of 218/228 degrees of duration at . 3-liter LM7 engine replaced it. 01 The L31 was available in the GMT-400 SUV's from 1996-2000, although the only GMT400 style SUV that got the L31 350 was the Tahoe Limited. by Michael Decipha Ponthieux Posted: 2013-12-7 Last Updated: 2018-01-28 CLICK HERE for the Ignition Timing Write Up The following table lists the typical MBT spark for common cylinder head/engine combinations, your engines MBT will vary. I just recieved a 5. I'll be adding more info relating to cams and cam swaps, but this should be a good starter. New posts: New posts: More than 15 replies or 150 views: Hot thread with new posts: No new posts: No new posts: No new posts: Hot thread with no new posts: Closed Thread Technical Notes: The LT4 camshaft P/N 24502586 was designed to be used in a number of different engines. 5:1 compression and a 1. . 600 lb-ft is possible but very expensive with a small block. Besides most Vortec's being iron block, as seen above there are some serious size differences and considerations depending on your project. 287 Lobe lift x 1. These profiles are designed to enhance throttle response and low end torque in vans, trucks, passenger cars and mild marine applications while delivering fuel efficient motoring. Over 6,000 Automotive Torque Specs. I don't know where people got 160 and 242. 050-inch tappet lift with a lobe separation angle (LSA) of 112 degrees. I'm going to boot my other PC, and add the graph into this post. Taking off the stock intake manifold and exhaust and cats and replaceing the exhaust with decent headers and some free-flowing mufflers will make a huge HP diff and fuel economy diff. The Vortec design relates to cylinder heads having a much improved air flow along with a Roller Camshaft which gives the motor more horsepower. Performance Specifications The Vortec generated 255 horsepower at 4,600 rpm and 330 foot-pounds of torque at 2,800 rpm, or the force required to move a vehicle forward. 3Z to a L31 swap adding New posts: New posts: More than 15 replies or 150 views: Hot thread with new posts: No new posts: No new posts: No new posts: Hot thread with no new posts: Closed Thread I bought a 1997 GMC ext. Honda CRF250-109 Cam Insert. The majority of engine codes begin with the letter L -- L31, for instance. 3Z to a L31 swap adding Chevrolet Factory Cam Specs by part number Part # Lifter type–duration at . 7L V-8 Industrial High-flow cylinder head with straighter intake ports and a higher compression ratio delivers impressive Performance Camshafts & Kits. Founded in 1925, it proudly maintains one of the largest GM parts inventories in the Midwest, making it possible to ship most parts same day as they are ordered. Formerly GM Goodwrench, this Genuine GM Parts Replacement Engine long block 350 replacement engine was created as a drop-in replacement for 1996-2002 Chevy/GMC 1/2-ton and 3/4-ton [1] For LT1 and L98 engines 1995 and before, the dowel pin in the end of the camshaft must be pushed in so . The L31 was the last engine to come out of the first-generation 305 Chevy Vortec Cam Specs. I did something similar for my 93 GMC, well similar as in upgrading to a roller camshaft and keeping TBI. You will have to have a diagnostic scanner (not a code reader) to get it set back in it's correct location. Just adapting some fuel lines, the L31 fuel system should be able to support a stock LS, if you have a few nights to dedicate to it the harness is really easy (but tedious) to trim down, or you can get a harness online. 30"+/- . Our recommendation for a camshaft would be something mild along the lines of the very streetable GM HOT cam. 6:1 rockers. I figured this should clear up some of the multiple posts just asking the specs. I am in the process of (re) building a SBC 5. Due to a casting variation in the head from the OEM, the 1108-GS and 1109-GS cams may or may not have enough clearance to avoid interference of the two parts. When GM Performance Parts released the L31 Vortec heads for small-block Chevy engines in 1996, they were an instant hit with the hot-rodding crowd due to the great flow numbers (outflowing the venerable Bow Tie heads), efficient 64cc chambers, and great price (under $500/pair, assembled). From the GMPP catalog: 24502586 Hydraulic Roller (LT4 Hot Cam) This hydraulic roller cam is for service only for all V8 engines with roller camshafts. Camshaft, TPIS Super L98 Hydraulic Roller Camshaft, SBC 87-92, LT1 93-94. Easy to use parts catalog. I would like to know the camshaft specs for the 295hp Vortec 350 marine engine , the 1 with the marine intake. In article <mikebandE@netcom. When timing the Vortec 4. 428" Intake Read the tech article on a Budget Vortec Head Cam 355 Build, brought to you by the experts at Chevy High Performance Magazine. 414"/0 The Chevrolet L31 5. 447/. In planning for the up coming engine replacement, I am considering the crate L31 engine and replacing the stock cam with the GM 14097395 cam that comes in the HT383 engine. I do believe that there's a lot of unseen potential in these engines. 7L. 96 L31 Camshaft Profile The Hot Cam specs are 218/228 degrees of intake/exhaust duration at 0. PN 12558060 is the L31 service head with valves and springs. 3L, 5. This item is a Special Order Part. I removed the normal spring-loaded ball mechanism that acts as a relief. THey do have factory roller cams, the cam you listed looks like a regular flat tappet. 050 In/ex–Lift in/ex–centerline–description 5. 525-inch lift with 1. 0L, 5. 3 Liter Vortec engine by General Motors is based on the small block V8 platform. 464 lift, does anyone have a more definitive spec for he stock vortec heads? The factory L31 was rated at 255 hp IIRC, but the 330 HP Gm crate engine is basically the same engine, without exhaust and such. The Vortec 5700 produces 255 horsepower (190 kW) and 330 ft·lbf (450 N·m) of torque. Now with the ignition switch in the run position, engine not running, you should see 12 V between the harness connector and ground. com FREE DELIVERY possible on eligible purchases I could be wrong but I thought that 95 was the last year for the 5. GM 5. GM Parts Now is owned and managed by a Chevrolet dealership in Michigan. These motors seem to really stop breathing after 4k RPMs. I am getting ready to assemble the engine, so now is the perfect time to change the cam. Hard to beat prices of l31 hd camshaft and relevant listings. Search Car Torque Specifications by Engine or Model I had to replace the distributor gear on my '97 350 vortec. Bored . Bone stock it makes about 270-280. NOTE: The LT4 camshaft P/N 24502586 was designed to be used in many different engines. What can I expect with an LT4 Hotcam in my L31? I just swapped out my 305 for the 350, and Im already looking at beefing up the 350 (Yay stimulus check. oil pan HV oil pump flat top pistons Roller timing Chevy LS1 Hydraulic Roller Camshaft . 3 L V6 that used "vortex technology" to create a vortex inside the combustion chamber , creating a better air/fuel atomization. The name "Vortec" can be confusing because GM used that name for their V6 and V8 truck engines as far back as 1985. If installed in one of these trucks, a custom computer re-program is needed. Good cam to use in those engines is a 94-97 LT1 Z28 cam. (I think that it's important to track down the cam specs before I do anything with the heads, right? Intake/carb It's a 2 bolt main, so everything that I buy should be able to be swapped to a new 4 bolt main when $$ permits. The Vortec 5700 produces 255 hp (191 kW) to 350 hp (261 kW) at 4600 rpm and 330 ft-lbf (448 N·m) to 350 ft-lbf (475 N·m) of torque at 2800 rpm. World’s top manufacturer of performance camshafts, lifters, valve springs, rocker arms and related valve train parts for all race and street performance engines Agreed with Kamikaze, above. The performance is improved in the LT1 as it has bigger camshaft specs, etc. World’s top manufacturer of performance camshafts, lifters, valve springs, rocker arms and related valve train parts for all race and street performance engines 350 vortec 400+hp build. I have a 98 Silverado and the previous owner told me he switched out the 5. It just so I have 350 chevy, I would love to add some power with a camshaft, checking the casting numbers I found : 10243880 for the block (not roller) 12558062 for the cyl heads According to some lectures, that block is used for an L31 vortec engine, and the same for the cyl heads. Re: will Vortec heads work on Gen-1 smallblocks? Perhaps I was one number offapparently I was referring to the L31's, as I was intending to refer to the Vortec 305 heads. You can reuse the stock roller lifter which is the great thing about them. The stock combustion chambers are too large as-cast, so they need to be milled if used on a 305. 4601cc (280ci) Compression Ratio. 5 90 66-73 FT/LBS 80-106 FT/LBS 119-146 FT/LBS Other than the block and camshaft, the ZL1 was identical to the L88. Got confirmation from the truck guys that the L98 cam would cause a loss of lower end torque over the L31 cam. The blocks are the same. The camshaft has to be machined for this, so if you get a new cam for a ZZ engine, make sure the cam grinder knows about it. also i'm going to be running a edelbrock performer an 6oo holley on the vortec motor, headers into flowmasters. Camshaft specifics determine where your engine makes peak horsepower, the engine’s effective power band, idle characteristics and available engine vacuum to name a few. 492-inch lift with 1. This one is for sale & the add says there were only 60 made. If you need to know if this camshaft position sensor test applies to your specific 4. 459 with 117 LSA. 3. The Chevrolet small-block engine is a series of V8 automobile engines used in normal production by the Chevrolet Division of General Motors between 1955 and 2003, using the same basic engine block. 01 I bought a 1997 GMC ext. Model specific subject matter experts, classified ads and more. 340hp carbureted. Remove the Camshaft Position Sensor with a pulling and twisting motion. It's 3 or 4-row (awesome) and has hose fittings that will fit my L31, trans cooler fittings that fit my TH350 once I pulled the adapter bushings out and oil cooler fittings that will fit my L31 (that has an oil cooler and came with the lines). com>, According to Chevy that due to the use of the Allison transmission the 454 had to be governed. Re: max lift cam on stock vortec heads « Reply #13 on: August 24, 2011, 12:39:07 PM » listen to bad rat he does heads for a living among other things. 5 Rocker Ratio) The L31 was available from 1955 until 1969, but was reintroduced years later and was available until 2002, when the 5. 350 vortec 400+hp build. 7 NON Vortec engine and that when Vortec’s came out in 96 were all 5. Freshly rebuilt 5. Hello all, New guy to this forum. 7L 350 heads The L31 5. This cam is great for additional bottom end torque. This camshaft is a great upgrade for 1996-2000 Chevy/GMC trucks equipped with the L31 Vortec 350 Engine. The ZL1 capitalized on the extra airflow by utilizing a more aggressive camshaft. Buy Crane Cams 1449541 Camshaft: Camshafts - Amazon. The L31 seems to have the fewest things to work out and get a "turn the key and go" install. Assuming I upgrade to something just above the 24 lb/hr injectors, and thus, somewhere north of 400 hp but south of 500hp at the crank, are there any upgrades I need to make to the engine internals to ensure reliability. 01". OK! i just spent 3 hours searching here and google to find a list of factory cam part #s and specs. Some year and model applications may differ slightly according to factory exhaust sytems, factory air intake systems, and other components. GM Engines 12681432 - Vortec 350 L31 New Crate Engine Free Shipping on a New 350 Chevy Engine From the Number 1 Chevrolet Performance Dealer in the World SDPC Also intriguing is a complete ’96 to ’02 L31 truck and van 350 Vortec engine (PN 12530282). This engine is a direct replacement for all MARINE engines 1998 and newer. I was considering using it because I HAVE it, not buying him a cam that has to have a tune to run. Technical Notes: The LT4 camshaft P/N 24502586 was designed to be used in a number of different engines. Yes the cam Ian metioned is also used in the Ram Jet 350, but it is not the one Brent was asking about. The 2002 Model year was the final year for the L31 5. The L31 and newer 4. (said done by a professional mechanic of 30 years) The truck runs amazing 80 percent of the time. Horsepower and Torque ratings are the original GM ratings from the most common application. It just so View 005 Chevy Vortec 5700 57 350 L31 V8 Swap Cam Engine Camshaft Timing Gear Chain Installation Crane - Photo 112158921 from Increased power for your 1996 to 2000 350ci Chevy Vortec 5700 V-8 engine Can someone please tell me some information on the Torana L31 SL/R 5000 (see picture), as apposed to the L34. The newer -0411 or "silver" ECM is a popular upgrade and is a faster and "smarter" ECM, able to control any powertrain combination and dual electric fans. All new from GM, it features Vortec-style, cast-iron cylinder heads, a one-piece rear main seal, and hydraulic roller lifters. The check engine light is not flashing, like it does with a bad misire. I've got a friends '97 Silverado in my driveway with a blown head gasket, it's got the L31 Vortec engine. This 5. engine,(service partial)(see additional information icon)(does not include camshaft) 12556121 ENGINE, New/Remanufactured Select vehicle options to narrow down result The Hot Cam specs are 218/228 degrees of intake/exhaust duration at 0. 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. I. their a good little cam. Chevy 350 Vortec Heads Specs. 5:1. The spec Ian posted is for a 383 truck cam with 1. Because of this, it has become a very popular swap. Approximately 300hp with stock PCM calibration. ask what the lift is on a kit called the hot cam. d. 430 to . MBT Reference Chart. benjaminearle Full Access Member. 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. A camshaft on a 111 LSA in a naturally-aspirated 350 with under 10. First off, this is for a truck. This is all we have on the stock 96 L31 cam. Then, Then, using a pair of pliers, break the connector on the OLD sensor so it cannot be reused. L59 denoted a flexible fuel version, while the LM7 was the standard version of the engine. 7L Vortec head can be used on the 305. I have seen numbers for stock L31 vortec head cam lift anywhere from . i. 431-811658 CAMSHAFT This is a genuine Mercury Marine factory OEM part, not aftermarket Please check our current stock level and order below or use the Contact Us form at the bottom of the page for any questions Now, I just happen to like the L31 heads, but you could certainly do it close to these results with the GM 882 heads. I need a new camshaft that creates more torque from 3000-5500 RPM for starters. The L31 Vortec Marine runners are 8" long, for comparisons sake, the LT1 has 4", the LS1 has 14", the TPI has 21" runners. L31-R long block assemblies are built up from 4-bolt main blocks with one-piece rear main seals. 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 . FYI- the HT383 uses the same cam as your current stock L31. Power output is 285-295 hp (213-220 kW) and torque is 325 lb·ft (441 N·m) to 335 lb·ft (454 N·m). 7 L31 Vortec 350. This engine already has the right heads, plus it uses a hydraulic roller cam. But the L31 is built for torque and towing. Lunati Single Valve Springs. Chevrolet adds a nodular-iron crankshaft, powdered-metal connecting rods, and hypereutectic aluminum pistons. Whoever told you 430-450 ftlb of torque was off by 100 lb-ft. The Ramjets are also fairly short, probably in between the Marine and LT1 runner length. 7L (350ci) Vortec Base Marine Engine (1996-Current Replacement) GM Marine replacement marine engines are built with the same innovation and durability from their automobiles. The marine engine and the L31 truck engine have the same heads and run the exact same 60 psi of fuel pressure, what makes the marine engine need the 24 lb/hr injectors and the L31 truck engine get by with the 19 lb/hr injectors?? Chevy Forums FREE technical assistance for your restoration and repair. 428" Intake A camshaft on a 111 LSA in a naturally-aspirated 350 with under 10. 6L 90° V-8, Cast Iron Block with Aluminum Heads. 5 rockers. l31 cam specs