Hi guys my name is Manuel im from Australia ,Sydney,I have a Holden commodore ss with a genIII 5.7 engine.
I reacently put a intercolled turbocharged kit,(garrett gt 3540rr turbo) running 10psi,and while it was getting dynoed it opened a crack in the bore.I previously had a supercharger on it which ran 10 psi aswell for 1 year,i had problems with the previous tuner with detenation,lots of detenation,i think iy weakend the bore.
I sold the supercharger because lt kept on throwing belts,so i went turbo instead.

My question is i have now a 6.0litre iron block with 317 casting heads and dished pistons from the lq4 engine,i bought all the parts separate,block,pistons,heads,with the crank and the rest from ls15.7 engine.
At the time i cant aford forged internals which would be the best for my application.but i thought going this way i could drop the comp.
In Australia lots of guys are running these same turbo setups on standard ls1 5.7genIII with standard comp.(10.1) on 10 psi.

Are the dished pistons from the LQ4 engine stronger than the ls1 5.7flat pistons?
The dished pistons have a thicker ring lang ,and the piston itself is chunkier,would this make it stronger?Being from a truck engine plenty of torque.
The reason im asking these questions is because not many people here know about these truck engines,and my mechanic thinks that the pistons look weaker than then ls1 5.7 beacause the casting on top of the dish looks rougher.
Ive being told here that all Ls1 genIII pistons are made of same material,is that true?

Could some one let me know what they think.