Community Q&A Question: choosing compression

Asking About: Mustang Ford Racing 363ci Boss Short Block Assembly (79-95)


choosing compression

How do you choose what compression you're buying when purchasing this short block? I don't see and option for which cc piston it comes with or to change to add or reduce the CR.....any help?
from Cordova |
0 0

Typical single eyebrow pistons are 2.3 cc's. Double eyebrows are 4.6 cc's. These are flat top pistons so your static compression ratio(presuming you don't deck the block or shave the pistons) will be dependent on the cc's of the combustion chambers of your heads. Compressed head gasket width has a small bit to play in it.

Try this site to see some of the basic rule of thumb numbers and calculate static compression ratios.
from Jefferson |
0 0

More simplistic cr estimator. The crt one seems to get weird calculating strokers.
- Johnny last year
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