i am going with a gsr bottom end and b16 head but i want to know exactly what my compression would be if i ran either jdmp30 pistons?,jdm itr pistons, or ctr pistons?all standard size.i just want my compression to be atleast 11.7-11.9.do any of you know from experince?

 

the "1post per ?" pistons will make you tons of HP

 

check out C-Speeds CR calculator at http://www.c-speedracing.com/h...c.php, the accuracy would be close but for pct pistons, go with this

PR3 head/B16 Block

STD = 11.643438609136867
.25 OS = 11.703231023151065

PR3 head/B17 Block

STD = 12.193487116069006
.25 OS = 12.256369577319077

PR3 head/B18C Block

STD = 12.58636786521145
.25 OS = 12.649248792586258

P72 head/B18C Block

STD = 12.924594026551906
.25 OS = 12.989047869209281

PR3 head/B18A/B Block

STD = 12.825536009218106
.25 OS = 12.88971493738735

P72 head/B18A/B Block

STD = 13.170743903246784
.25 OS = 13.236528215133324

 

i think ill stick with the jdm p30 pistons.