Yea GEN1 is completely different prep than a GEN3. GEN1 has a lot better head gasket sealing but bottom end is a lot weaker. 4 bolt caps on center mains only then with no skirted block the caps walk alot easier. The GEN 1 chevelle had a partally filled 4bolt main with stock caps, and studs I think. The truck is same setup with no fill. By the time you spend the $ converting a gen1 to billet splayed caps, and filling the block you would be better off buying a aftermarket block. I think a good 4bolt main with studs should be fine for - S475 and ~700hp. 900 is pushing it. Good machine work, balance, and light parts along with keeping RPM down is key to survial with a factory block.

 

Yea the Gen 3s get the home court advantage of having the deep skirt block but other than that, eh not really my thing. I suppose one could argue a little more rigidity in the lifter valley as well but I don't have to pull my heads to change lifters either. What I'm going for isn't going to be cheap but the way I justify it is its no more expensive then a 450 hp 383 stroker crate motor would be. The turbo and related parts of course will all be added cost on top of that but for the amount of power I stand to gain its very justifiable.

 

So what would be the best turbo for a 416 ls3 built for 1000hp? Would the new hPC GT-K 1050 be good? Looks like it might be small. Maybe 2?


Billet GT-K 1050
HPC-76
F1-68
T4 0.96 A/R
4-bolt / 4" V-Band

 

Way too small on the exh side but would still run ok if you keep rpm's below 5K. You need something like a PT88 or GT88 to make big power on that many CI's. A S480 would be a decent mid ground turbo for that.

 

yeah thats what my second choice if the gtk was too small was gonna be for a single unit the pt88.

 

Alright my $210 dollar turbo header kit didn't turn out quite so good. It may have been made for a SBC but not a SBC in a 95 chevy. The drivers side fits great but the passengers side is nowhere near going to fit. So now I get to fab up a passengers side header for it. Going to go with a log style and would like to use schedule 40 pipe. I'm going to need a flange preferably 1/2 inches thick, some schedule 40 90 degree elbows and a schedule 40 3 inch mandrel bent pipe. Going to need a turbo flange as well.

Is there a one stop shop turbo kit fabrication supplier that will have all the various bends and flanges and what not?

 

Mandrelbends.com may have what you're looking for.