9.0:1 arp pistons. Are these pistons good to go with for a 1992 GS-R? I am planning to go turbo soon but I am going to run it without turbo for a while. What do you think the horsepower loss is with going with these pistons?
Yes, those pistons are perfect for a turbo application.
Naturally aspirated, I don’t think you will lose too much hp when using those pistons until you go turbo since your stock C/R is 9.7:1.
Originally posted by 93B18
[B]Yes, those pistons are perfect for a turbo application.
Naturally aspirated, I don’t think you will lose too much hp when using those pistons until you go turbo since your stock C/R is 9.7:1. [/B]
Leo, couple of questions for you. One, how much for the poly ingalls kit (GSR01 is looking for one), and what do you think about running the stock GS-R pistons at 9.7:1?
high compression & turbo will always make more power than a similiar low cr setup, but at the expense of a smaller margin of error when tuning. are you rebuilding your motor or just bolting-on a turbo kit? if you are rebuilding, consider aftermarket forged pistons because the stock cast pieces are the weakest link in the motor.
Originally posted by qwkteg125
high compression & turbo will always make more power than a similiar low cr setup, but at the expense of a smaller margin of error when tuning. are you rebuilding your motor or just bolting-on a turbo kit? if you are rebuilding, consider aftermarket forged pistons because the stock cast pieces are the weakest link in the motor.
Thanks Don. I just wasn’t sure how much compression would be ‘too much’ for simple tuning. I don’t have access or resources to do a bunch of dyno runs, so hopefully a couple will do me just fine. As for rebuilding, yes, I am. Don’t want to just slap a turbo on there and throw a rod or something similar. BTW, what kind of compression are you running, and what psi are you boosting?
“blacksheep” project STARTED?
:uhoh: i’m going to stay tuned, jordan. looking forward to seeing your car the way you want it.
hey jordan i like 10:1 myself but 9.5:1 should be more than safe. currently my motor has about 9.5:1 cr, boosting an untuned 8psi. after tuning i’ll be boosting about 13psi daily, because that’s how stiff my wastegate spring is.
Originally posted by B17A
Leo, couple of questions for you. One, how much for the poly ingalls kit (GSR01 is looking for one), and what do you think about running the stock GS-R pistons at 9.7:1?
Email us at Importstop@mindspring.com with your zip code and we will quote you a price shipped.
As for the stock GSR pistons used for a turbo app, what qwkteg said.
Thanks Don, Leo.
Originally posted by qwkteg125
hey jordan i like 10:1 myself but 9.5:1 should be more than safe. currently my motor has about 9.5:1 cr, boosting an untuned 8psi. after tuning i’ll be boosting about 13psi daily, because that’s how stiff my wastegate spring is.
dsmn thats hairy… if you get it to work congrats cause its going to be a bad ass setup!