H82BBad

what end gaps are you using on your forced inducted 3.9 bore engine?

taqwache

this matters how much nitrous you are going to use and how often. for a motor that only uses nitrous use .027 top and .025 second. if you are only going to spray it a few times or have a little bit of boost (10psi and under) then you can use .020 top and .021 second. remember that the more gap you have, the more power is lost due to leakdown and blow by. also the less gap you have, the bigger chance you have of expanding the rings till the gap shuts closed with heavy N2O use. so be honest with your self. hope this helps.

H82BBad

Thanks, even more gap on the second ring? Your the second person that told me this today

I am going to be running a 200 shot and maybe more.