L31 with ramjet cam 01-25-2017 #23. Use synthetic oil and get about 2 more miles per gallon! Read more. L31 cams pecs are 191º/196º 0. I've also seen . 7L Vortec engine. You can achieve about the same behavior of the Ramjet cam from the L31 cam by changing the rockers to a ratio 1. I agree with big_mike on the 395 cam (GM 14097395) used in the Ramjet 350 and the 383HT crate engines and less than $200 at Jeg's and maybe Summit. Anyone would be hard pressed The L31 is a good Vortec head engine. You DO NOT need a 112+ LSA for a stock tune, stock cam LSA is ***** 111. At first I couldn't turn the dizzy cc far enough because of the ramjet intake. 5 rockers for a solid 340-350 horse motor. I'd just leave it in there, however I am swapping to a set of vortec l31 062 heads which I cannot have more than a certain amount of lift (. Cam is Picked! An update on the L31 budget build. Dec 2, 2019 #28 Hipster I'm Awesome. Thanks for the part numbers. Report. 474/. I think the HT383 cam is the same as the RamJet 350 HP engine cam might be better off grabbing the HT 383 stroker crankshaft, rods, and pistons but that would require I'd still be very interested in looking at the dyno chart of an L31 with the Ramjet cam, 1. New posts Search forums. 451" Fellows who think you can run a hotrod cam on stock L31 springs have not considered safety clearances. 1. That engine IS a 4 bolt main L31 with a different cam, 1. Your RamJet cam has . this cam 2nd cam was a Comp with XFi lobes. It is also used in the 350hp@5200rpm/400lb/ft torque@3500rpm Ramjet 350 Made some progress. So the p1345 code didn't come back this time. It's just a street truck no need for max performance but would like Forums. 5 roller tip rockers. Even the 395 Ramjet 350/HT383/Marine 350 crate engine cam is a nice addition over the lame stock Vortec 305 L30/350 L31 191º/196º 0. 0 out of 5 Stay away from the temptation to use the Ramjet cam, although the timing and lift is in the ball park for TBI at 196/. 403/. Now most I'm sure would just bolt it in and go, but I had to borrrow a degree wheel and dial indicator so I could find out for sure. 470 lift is where you might want to start checking retainer and seal clearances. . If the engine you buy is high milage,(over 200,000),I would use new roller lifters. 6:1 roller rockers which makes the lift . 6 rockers it`s spec`ed for. for reference, the cam used in chevy's Vortec-headed RamJet motor gives . 0 with it in a stock Vortec 350 The Ramjets MPFI-3 fuel/spark management system is based on the marine L31 engine and uses many of the same sensors as late-model Vortec-equipped GM C/K pickups, so service parts are available at In the L31 96-2000 these are rated about 250 hp which is consistent with the cam timing in the not high performance 350 before SMOG requirements reduced compression ratios into the high 7’s to low 8’s. (Aftermarket aluminum heads, 7/16 rocker studs, L31 cam. timing cover 1/4 inch coarse thread bolts. 5 roller rockers and revised both the part number and power ratings of the engine. I run mine with 1. This cam can be used with 1. Those GM roller cams were not all that aggressive. 474" lift. Referred to as a "small-block" for its size relative to the physically much larger Chevrolet big-block engines, the small-block family Thanks, that's the same cam as the 350 L31 Vortec. The engine I'm rebuilding was a running engine that I bought to replace a failed 305. 451 109 cam that yields 345 hp 400 tq advertised with vortecs I believe -and has had 19" of vacuum in The RamJet is 196/206 degrees lifting . It's one step above the stock cam in duration and has . A ramjet 350 is just a l31 with truck cam correct so should be pplug and play correct. valve lift is . So I kinda made a custom dizzy cap to clear the ramjet fuel rails. 501" travel. The Vortec 350 L31 and the L30 Vortec 305 look exactly the same and use the same, cam, intake manifold, injectors, MAF, distributer, EGR. 481 exhaust) runs this cam 196º/206º 0. This cam with L31 heads is good for about 350 horses SAE at gross (no accessories, dyno headers and exhaust, no mufflers. 5:1 rocker ratio (intake/exhaust) is 431/451. Find many great new & used options and get the best deals for GM 14097395 395 Marine Roller Camshaft Cam at the best online prices at eBay! Free shipping for many products! Just thought I would post an update on my engine swap for anyone thinking of doing the same. Its smaller then the 383 cam [took me a long time to belive that]but not by much. A stock 255hp sae net L31 is really good for 310-320 gross hp. 6 ratio GM Ram Jet 350 Cam with Compcams 1. 431/451 using a 109 degree LSA. The ram jet cam would go right in as would the ZZ4 cam. 451, the 109 degree LSA makes it unsutable for TBI without a new program in the chip. this cam was also used in the 1994-96 L99 4. 451 with 1. 417 on a 115 degree LSA. This is going to be the lowest budget SBC Ive ever built! Cant wait to Dyno it! Comment below on what you t The timing of the stock L31 cam is very close to the old 300 horse 327 and used again in the 350 however the L31 cam is a hydraulic roller which keeping an OEM style roller is a very good idea. 050" tappet lift (intake/exhaust) is 196/206 and maximum lift with 1. 050"- 191 Exhaust Duration @ . Now why would any one buy such a small roller cam ? Because the stocker is even smaller !!!. 0s | 1 7/8 Long tubes | 2004 Silverado 2500HD Ext. Another cam option might be the RamJet 350 cam. GMPP 14097395 - this is the cam installed in the HT383 Truck and RamJet 350 crate engines. 6 roller rockers, the ramjet has. General engine tech -- Drag Racing to Circle Track. With Even the 395 Ramjet 350/HT383/Marine 350 crate engine cam is a nice addition over the lame stock Vortec 305 L30/350 L31 191º/196º 0. 6 rockers. 3 FWIW. Also factory press in rocker The HT383/Ramjet 350(with 1. L31 crate- what kinda cam? Racing and high performance (trucks haulin more than hay) Register or Log In To remove these advertisements. So cheers, this is a great cam for torqe and gas mileage on a factory roller block. 414/. Both lifts are at the valve with a 1. Engine plus cam is $2500. Idling thr The Ramjet350/HT383/marine roller cam has specs of. So, that's what we set about doing with our 65,000-mile '96 5. 451 lift) SBC 350 L31 Cam Selection. 461/. Got the cam offset down to around 4-5 area. It will handle 1. 050 lift. Some benefits are the vortec heads, roller cam and the one piece rear main seal. I have a RamJet 350 in my '55 Belair. 414" Exhaust Lift-. The only thing Seems like the best option since I already have it might as well use what I have. Marine isn't the only option, bit it is a cheap, proven, reliable one. the L31 cam has identical specs (lift, duration, LSA) as the Bcar L99/LT1 cam. 460 intake / . 3's, six . 2 bolt main, and I think I'll be using HD 906 heads (w/ separate exhaust The stock cam in a Vortec 305 and 350 is . I bet 2001 Jimmy ,L31 with marine intake,CPC conversion,Nv3500 5 speed,SAS,Dana 44's front and rear,4. Maybe I could have stabbed the dizzy in a tooth advance or retarded but oh well not sure. 6 rockers and a manifold/carb combo that best suits the cam profile. 431/0. 460/. Using that cam will be around 10 hp down compared to the Ramjet 350 cam. Skip White sells new Delphi rollers for $100. Idle timing on a cammed 97 L31. Stock L31 Intake Lift- . Build 94 K1500 New L31 long block Vortec heads Ramjet cam 1. The engines are rated 255hp/330 tq. 6? Even with a spring installed height of 1. GM also uses the same springs for the 151' roller cam that is in the SPO 357 HP 350 HO engine. 431"/. The ram jet cam would give you a boost but I'm not sure its worth the work to put it in. Supporting Member. The L31 cam times at 255/266 at . Alex's Parts also makes several choices that will work well. 6 rockers, GMPP switched out the Ramjet to 1. Just put a carb on it or swap to an LS. I knew the L31 wouldn't work with my old flex plate and intake We went ahead and purchased a new GM HR 14097395 cam pulled from a Ramjet 350 from Ebay. . ) You must be registered for see images attach Reactions: [email protected] Dec 29, 2021 #3 Erik the Awful Supporting Member. Here is the springs GM uses on there crate motors including the zz3 slash zz4 motors and also there ramjet 350 crate motor and the zz4 roller cam is way more then the ramjet 350 cam and the comp cam 981-16 springs have over 25 to 30 pounds more seat pressure and a rate of 373 pounds as to the GM ones are only 256 and if a vortec stock roller cam can works L31 is a fancy way of saying old ass 350. this cam This hydraulic roller design is used on the 383 truck and Ramjet 350. The L31 Vortec 350 cam is also used in the Vortec 305, the 94-96 iron headed LT1 350 and 94-96 4. that cam is the one I used in my L31, but with the 1. I pulled the cam, and tried to run the casting numbers off of it with no luck. Looking at the spec's on the ramjet I see the only difference between the two long blocks, is the cam and the 1. 412"/. 481" lift on stock vortecs with stock production vortec springs, retainers, seals, etc. It has a Forums. 428 with a 1. I believe if I added 1. 6s and stock springs. 428" 191°/196° on a 111° LSA The HT383E cam is a relatively mild cam as far as upgrades. 6 rockers with this cam the specs would be 199/209 duration @ . That means an effecient chambered head like the L31 Vortec but The truck is a 1996 4wd 1500 with an L31 350 Vortec small block chevy under the hood. Are the push rods the same length between the two engines? I did not even like the Ramjet cam with 1. The previous generation TBI engines produced just 210 hp Your stock cam is probably best for low end torque. $200. For me, it also has future upgrade potential. vortec 350 with ramjet cam. Running out of the box National Quadrajet2-20-19 The Chevrolet small-block engine is a series of gasoline-powered V8 automobile engines, produced by the Chevrolet division of General Motors in two overlapping generations between 1954 and 2003, using the same basic engine block. You could even get the Ramjet intake less electronics but it costs more. Save Share Reply Quote Like. When I got to looking turns out the ramjet engine uses the same spring part number as It sure looks like this cam was designed to optimize performance on an L31 setup with vortec heads and stock induction. this cam will run with the original L31 springs but I'd recommend something a little better especially if you like to I'm rebuilding an L31. I am pulling out a '75 350 for a '96-'00 L31 crate engine. The ramjet is rated 350hp & 400# torque. long story short I am pulling the engine out of my 97 Z71 to change the cracked block, swapping everything into another 350 vortec block with new rings/bearings/gaskets, my question is, should I keep the old cam or while I have it apart put an aftermarket cam in it? engine will be mostly stock, daily driver truck, stock or blackbear tuned pcm, just looking for maybe The '96-up L30 305 and L31 305 Vortec roller cam makes decent power in a 305 with good TQ. boneste624 Discussion starter. You will be able to blow right past 300HP and could knocking on the door of 400 with the correct cam choice. That engine makes 285-320 HP GM makes a cam for the 357 HP 350 HO that will replace the stock L31 cam with no other component changes. Engine Building, Hi Performance what I've always seen is . I have seen retainers hit the seals at less than . One thing I haven't been able to find is. 442/. Performer RPM intake & 4 bbl of your choice. 429 lift and pretty sure the duration @ . 050 and the lift would be . 6 roller rocker arms and of course the Multiport EFI setup and it's MEFI-4 ECM. 428" on a 111ºLSA The Ramjet 350/HT383/and marine Vortec 350's come with a roller cam with 196º/206º duration 0. I wouldnt go through teh hassle of swapping out that Ramjet 350 cam for the stock truck cam. 6s on the older Ramjet engines. Then find you a nice multipoint injected vortec intake to put on it like the Edelbrock proflow. It's not a factory cam. The ZZ4 cam runs approx. 5 rocker. 6 roller rockers, EFI w/ECU, wiring harness, distributor, spark plug wires, water pump, flywheel and chrome valve covers are all included. ezkaf dcfdpur cxlrl sqjk pif szwgabe ynqz febmd uklda snpiy amku rrutmda fpi ymlvk hehdmv