might be better off grabbing the HT 383 stroker crankshaft, rods, and pistons. I think the HT383 cam is the same as the RamJet 350 HP engine cam. LS7 427' Corvette engines used shortish 210 intake duration, wider 229 exhaust duration, and ultra-wide 121 degree LSA cam for 30 MPG, 7,000 RPMs, and ~530 open header HP.

and/or a custom made short duration cam with wider LSA. and getting a low RPMs/MPG computer tune. there might be a little gain by advancing your stock cam by 2 or 4 degrees. roller and higher lifts per duration for added torque. it's a very short durations cam, like ~184/~196 durations, shorter even than the base cam in car SBC 350's and 400's. 106 installed straight up.Normally the 109 LSA would cause problems with the computer,but,the durations are so short,that it actually runs well.It could however,benefit a lot with some pcm tuning,as will even the stock cam,or,any cam swap for that matter.Īdvancing the LT1 cam would help some, but, not enough to make a big difference as you will still be losing cylinder psi with it's later timing.Honestly, you'll need tuning to realize any substantial gain with any cam swap.That cam is designed to run with 10:1 & make power later in the rpm range.Ĭlick to expand.That bad reputation is from a hotrodder's standpoint.

The Ramjet,if not familiar with it,has duration.

380 to 400 ft/lb) from 1800,or,so,up thru 4800 to 5000 rpm.Adding 1.6 rockers on the intake helps too with this cam in a stock Vortec.Even adding 1.6 rockers to the stock cam would,IMO,perform better than the LT1 cam for your vehicle & it's weight. Click to expand.Changing the cam timing will not change the LSA.The LSA is ground into the cam & it is what it is.With that heavy body,the stock cam would probably be a better choice than the LT1.A better option for you tho is the Ramjet cam(#14097395).This cam will give you tons more of lower rpm torque(approx.

Lt-1 cam 350