Ok so, I came from the supercharged grand prix world. The stock GTP bottom end has run 8s. Yes, stock bottom end.

THOSE MOTORS AREN'T EVEN FORGED. I was wondering what would happen if you freshened up a bottom end utilizing as many stock parts as you could and put on a thickER head gasket and low compression heads to lower the compression and tuned it VERY well.... how much boost do you think it could handle?

I know tuning is a huge part of the puzzle.

Only BIG issue is the PTV issues, but couldn't these be somewhat addressed by a custom cam? I haven't looked into the heads yet. Just bored at work thinking.

10#? more?

Soooo tell me how stupid I am.

 

I guarantee there is someone who has put an f-body bottom end in the 8's. Don't know how long that motor will last, but i bet its been done. Obviously, going to be FI of some sort.

I don't know the GTP all that well, but a buddy of mine knows everything about em. He always told me how they have quick/cheap ways to make them run awesome. Whats the stock comp ratio? I've always believed that cars that are built for FI from the factory have MUCH more potential than origionally setup. Take a MKIV supra for example: those motors are bulletproof and love big boost. Aren't there guys pushing over 900whp on stock motors?

F-body is 10.5:1, which is NOT good for boost. Also, the car is 4000lbs! I think most say 5psi is safe, 8psi is pushing the limit and 10psi+ is asking for trouble.

 

I think the biggest problem is going to be piston durability.

 

x2. The hypereutectic pistons are like glass. The factory GTP pistons may be cast, but they probably have a lot of strength built into the ring lands, where the LTx does not.

 

Yeah, this seems to be the general consensus. Tho similar materials shape/weight and ring spacing all things I didn't consider.

Thanks for the answers guys!