If I do a compression test on my built motor and got 210 on all cylinder.......how do you calculate your compression ratio?

anyone has a formula or know how much compression my motor have. My JE dish piston is rated at 9.0:1 but with my gasket and welded head chambers I'm not exactly sure where it's at.

Any experts here, I know H-T peeps has the knowlegde.

 

Here you go...

http://www.c-speedracing.com/h...c.php

 

thanks but that's for oem mixing and matching.

anyone know how much 210 is

 

a compression test and compression ratio are 2 different things. To figure out exact compression ratio you need to measure a few things while building the motor, combustion chamber volume, and piston dome/dish, and headgasket thickness are a few of the values you need to figure it out.

 

No, that site can be used for much more then OEM mixing and matching. I think you need to do a little more research...compression test and compression ratio are two very different things.

 

here's another B-series compression calculator for those that are interested...

http://technet.ff-squad.com/cr-calculator.htm