Whats the compression of CTR pistons in a usdm B18c1? Also what would they be if they were .25 over? Would this make a difference?

 

wrong forum - but I believe it to be in the neighborhood of 12.4:1 - thats pretty high - hope you got some 94 octane gas to run on 24/7

EDIT: Doh I just read your sig - please excuse me and my previous sentence been a long day here at work

- BTW I don't believe the oversize affects comp. ratio - you might wanna try a search - this has been covered a billion times here on H-T


[Modified by 2000-4DRGSR, 1:07 PM 11/29/2001]

 

you'll be at 12.2:1 with a gsr head. just make sure to get a good rich ecu program from skunk and you'll be fine. I run on pump gas and have no problems.

 

gsr head 12.5:1
ITR head 12.2:1

 

12.04:1 w/ B16A head
12.35:1 w/ B18C head

Mike, your numbers are more accurate when using a LS(89mm) crank.
12.17:1 w/ B16A head
12.47:1 w/ B18C head