Guess The Compression Ratio

Here is another calculator I used with the fields that I populated (in blue) with the info dgc333 provided and part # searches on the web.

http://mopowerstyle.com/index.php?pid=8


Enter Bore size 4.06


Enter Stroke size 3.58


Enter Head Gasket Bore size 4.06


Compressed Gasket Thickness .028


Enter Combustion Chamber Volume in CC's 72


Enter Piston Dome Volume in CC's use "-" for Dished Pistons 5


Enter Piston Deck Clearance If ABOVE deck use "-" .012

11.06:1 Seems high. Did I do something wrong? Thanks in advance. STAN

Yes the "5" cc's for the piston dome volume should be "-5" to accomodate the valve reliefs in the pistons. This changes the results to the 9.8 I had reported earlier. This value is only positive with domed pistons.