I did a compression test a few days ago and got 220-230-230-220. Does anyone know what kind of compression ratio that it equates to? I've been trying to figure it out, but the compression calcutator doesn't account for milled heads or flat bottomed valves, etc. Any help is appreciated.

Oh the motor is a a b16a2.

 

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.

 

Oh ok then, oh well. I guess I'll have to live just kinda guessing my compression ratio. But yea thanks for the compliment! I like my compression numbers too.

 

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.