Gain from lifter swap in LS?

[Vettezuki]

If I have to pull the motor to do anything with the cam or bearings, I'd probably take that time to do other work. Lifters are one possibility. Back in the day LS guys were swapping fro Caddy racing lifters and saying they were getting a substantially freer spinning engine and something like 15HP AIR. MMmm, is that BS and what are the nice lifter options these days for and LS1?

I've pretty much decided that for this engine, I'm going to stay NA and 346ci, but target as cose to 440WHP as possible. I'm at 390~ with stock manifolds and substantial back pressure. I'm thinking hybrid Tri-Y/LTs from Jammer, lifters, rockers, drop compression a half point with a cometic HG maybe, and retune at Cunningham. All together I figure about $3,500. This isn't going to happen soon, but if I have to pull the motor, I might do at least the lifters now.

[Shaolin Crane]

Yes, better lifters are always a good idea. Morel makes just about the best link bar lifter for the pushrod family of engines. About $370 and are good for 8000rpm

[Vettezuki]

Thanks. That's less than I would have expected.

[Shaolin Crane]

I have them in the black engine, purchased them from FTI.

[BADDASSC6]

Are you planning on doing anything with the heads? The rectangle port heads flow a lot more than the ls1 cathedral style heads. What about a cam? Let me know I have some shit you may find useful.

[Vettezuki]

Are you planning on doing anything with the heads? The rectangle port heads flow a lot more than the ls1 cathedral style heads. What about a cam? Let me know I have some shit you may find useful.

Thank you Carlos. It's already a heads and cam package. The Heads were HEAVIILY ported and otherwise modified 4.8L truck heads, which was done a lot back in the late 90s. The cam is the biggest smog cam available TMK. It's a 224/224 114LSA .566 max lift.

[BADDASSC6]

You could port you TB.

[blackax]

Fast 90 should do the trick.

[Vettezuki]

TB is ported too. Forgot about that. LS6 intake. Basically the air-in side (other than not the greatest intake routing system) is pretty good from TB-> intake -> Heads. The exaust is the next cheap easy power. I have about 3psi(!) backpressure at WOT on those stock manifolds. A good set of headers might be 20+ whp and much more under the curve aif I go with combo tri-y. Yes, 3psi backpressure.

http://www.motorgen.com/garage/showvehicle.php?vid=58

That's why I'm thinking 390WHP -> 430 WHP with good LT/Tri-Y headers, lifters, rockers and tune. Injectors are resized to 32lb and compensated for No. 7 (or No. 8, I forget).