help figuring compression

[357warrior]

K i have a 12:1 je piston. 0 deck height. .027 thick head gasket. .015 shaved head. Can some1 help figure compression ratio for this build. Thanx

 

[fknboss]

16? I'd need to know more like combustion chamber cc and dome cc. 16 is guessing without all the info.

 

[fknboss]

That's also going off stuff in your sig. 85mm +4mm stroke

 

[Gen1Pat]

Wait, so your quench is only .012" after having the head decked???? Your valves must sure be damn close to that piston. I believe that piston is pretty accurate to the advertised compression ratio. That being said, if it truly is, then you are looking at possibly being close to 13:1. As an educated guess, of course.

 

[357warrior]

Well i took it for a ride and havent made friends with anything yet so ambi the first one to test out that much comprssion

 

[357warrior]

I took it out today and layed into for a full run needs some carb tuning but other that its a f*****g monster from hell. Mid and top end unbelievable. Even though i had the flywheel lightened does not stop me fom going slow or pulling out the same way i used to. It does rev a tad faster and i did drw rocker arm mod lightening so cant all tell wat is helping where. Nothing is makin friends in the motor which i happy about bein such a tight gap.