It's a stock GSR block with 54,000 miles on it. Don't plan on sleeving it, just doing a quick hone. Is 81mm the bore piston I need to use, or do I need to go slightly larger?

What pistons do you guys recommend. JE or Arias or Wiseco? For turbo of course.


Thanks, Michael

 

just stick with 81mm, or you can bore it out .50mm over and get 81.5mm. If you're not planning to take the block out, stick with 81mm, just do a 10-12 quick passes with honing stone and put a set of new pistons and rods...

you can get shelf pistons for either size, so either way it's cheaper

stan

 

Thanks for the info. By the way I just noticed your Sig. about the guy that stole your car. When he gets out, **** him up bad for all of us.

 

i know that 400 whp on stock 81mm sleeves is easy to get but if i bore it out to 81.5mm on stock sleeves whit some new j.e piston will it hold on 20 psi or 400whp whit succes?

 

it depends on how you tune it.. i seen the inline pro guys do it with there gasket but i havent seen many other guys sucessfully do it...