Originally Posted by Patman015
What is it? I'm looking at pistons, just browsing though, and I found some JE pistons, but they're for all kinds of bore sizes. I heard that JE pistons are the best around. So I was just wondering what the stock bore is for my GS-R (in mm's). And what are the best high compression pistons to get? Keep my car's bore stock? What compression? Of course, I'm asking because I wanna go N/A with my car.
81 mm.
JE makes some good pistons. If you have the money, boring it out to 84mm and sleeving it would make some nice power with some high compression pistons. The compression ratio all depends on the quality of tuning and the octane of gas available.
Keep in mind that to get power out of an N/A car requires high revs and those will put much more strain on the motor than a turbocharger making more power. And if you think it is cheaper to make good power going N/A as opposed to turbo, you are so incredibly wrong.