GSR compression for jrsc?

[94exa2]

Hey guys, i am looking to rebuild an obd1 gsr block, or a poor mans R (gsr block, b16 head etc...), and am wondering what compression the jrsc would like on a gsr. I was thinking of boring the gsr block to 81.5mm, or 82 mm if safe, and going with 81.5/82mm ITR pistons, thinnest HG i can use, and milling the head to acheive 11:1-11.5:1. is 11-11.5:1 with itr pistons a good compression/piston for a jrsc? or would it like the stock 10:1 compression with gsr pistons?

 

[Samurai_Blue]

11.5 should be good

 

[94exa2]

11.5 should be good

i figured i'd be safe with 11-11.5, but is there a "better" compression for the jrsc?

 

[Samurai_Blue]

http://www.team-integra.net/forum/16-forced-induction/159393-can-jrsc-use-higher-compression-pistons.html

he was running 11.1

 

[94exa2]

what about ctr and b16a pistons in a gsr block instead of itr pistons? i know the shape of the piston makes a difference with boosted engines, so what would you say is the "best" piston for the jrsc?



ill probably just go with oversized itr pistons...

 

[TeggyBear_Ls]

the ctr ones are all motor only, they will give you somewhere in the 12's compression ratio lol.

i didn't think you could run that high of compression with the jrsc, i personally wouldn't go higher than the gsr 10:1 but whatever lol

 

[94exa2]

im probably just going to use itr pistons 11:1 unless someone has good reason to stay with 10:1 gsr pistons for a jrsc