Originally posted by 1stGenCRXer
Compression numbers do not equate to a calculatable compression ratio due to things like valve over-lap and volumetric efficiency at the RPM your starter rotates the engine.
The compression ratio for a B16a2 is 10.4:1. Which I found in 0.14 seconds on google using "b16a2 compression ratio". 
Those are nice compression numbers though, btw. 
actuallt the b16a2 has a c/r of 10.2:1...only available in the 99-00 si. the b16 sir II has a c/r of 10.4:1..jdm motor.