pushrod guys in here!

[IZZy]

Im trying to figure out the compression ratio of my car, I know aftermarket heads come with either 61cc chambers and 58cc chambers and they come out to around 9.5:1 and 10.5:1 compression ratio respectevely, I was told by the previos owner of my car that he milled the heads for 54cc's chambers so I imagine Im somewhere around 11.5-12:1?
what do you guys think?

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[Bigturbonotch]

Israel, to find the compression your going to need the bore, stroke, dish of pistons, and cc's of the heads, and gasket your using. if you get all that info, plug it into a compression ratio calculator and go from there.

 

[Drlee50]

http://www.csgnetwork.com/compcalc.html

never trust what someone tells you-- measure the chambers yourself to be SURE.

just with the 54cc heads and a stock short block and gaskets id estimate closer to 10.5:1

 

[IZZy]

http://www.csgnetwork.com/compcalc.html

never trust what someone tells you-- measure the chambers yourself to be SURE.

just with the 54cc heads and a stock short block and gaskets id estimate closer to 10.5:1

Thanks for the link, I put in the numbers and it came out to 10.4, so your guess pretty accurate.
Im trying to figure out if its safe to throw some boost at this motor without having too many issues, 10.5 sounds like something I can work with, I was hoping to be somewhere around that.
Thanks

 

[doug@performance]

Depending on how much boost,octane, and how aggressive you want the tune you can throw some boost at it with that compression ratio.