Engine Help > Honda and Clone Engines

stock Predator 420 Head cc

(1/1)

ScarryLarry:
Trying to get a rough estimate for compression. Shooting for13.5-140.

ScarryLarry:
For all a stock hemi 420 is about 35cc. After I cut .045 in the head for .030 pop out of piston I smoothed and polished the chamber I got 40cc. Now with a .030 pop out piston, .020 head gasket and 40 cc head I have 13.56 to 1. Let tell you the engine runs strong. 

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