I currently have a 93si with b18c1 engine, it had some ring damage when I first got the engine so I tore it down and installed some JE 9.1 compression pistons with a freas hone since I knew I was installing a turbo setup. I did this setup around 15 years ago and the car has held up really well, but it’s time to make some serious power now. My question is, what compression pistons is most running (would my JE pistons serve my purpose) in these high powered setups (500-700hp) I can handle the build and I know 95% of what needs to be done to achieve my goals other than the best compression to work from and which turbo to upgrade to. My current t3t4 when I had it built was only rated to produce up to or around 350-max 400hp, I paid around 1000.00 for the turbo only and has been a great turbo. Any basic pointers would be great and appropriated.

thanks

this is my current setup, I’ve still got to reinstall my exhaust and intercooler/piping over the next few days, this setup should get me 300+whp until I get everything together to tear it back down

i can run 93 or e85, I know if I run e85 I will need bigger injectors. Yes I do have someone that’s experienced with the tuning which is a relief. I’d prefer to use 93 only because the car sets sometimes and I’ve heard e85 don’t like that.

What turbo does most run, seems like theses massive turbos would be hard to get spooled