Compression Test #'s to CR?

INFORMATION Integra Help
1

I just bought a compression tester and got these numbers:
#1 270
#2 265
#3 270
#4 272
This was with a warm engine, WOT & fuel pump disabled. When I bought the car I was told that the CR was 11.1:1 but have had no way to verify it. The motor has about 24k miles and is a B18C1 bottom end from a '96 GS-R with B16A pistons & new OEM rings, a B16A head with CTR cams, Portflow inner & ITR outer springs, OEM head gasket. The question is: Can the ACTUAL compression ratio be calculated from these compression numbers?

2

i dont know the numbers well enough to really say, but im quite positive those numbers are a good deal over 11:1

3

thats what im thinkin-

http://www.c-speedracing.com/howto/compcalc/compcalc.html

this should help

:bow:

4

Yeah, I’ve used that calculator too but what I’m really interested in is an ACTUAL CR based on the compression numbers (if possible). I look at that calulator as more of an estimate. I’ve seen some posts of compression test results answered with a CR.