Originally Posted By DusterDave
FWIW, the static compression ratio on my old 528 blown Hemi was 7.8:1. Personally, I wouldn't go any higher than 8.5:1. Here is a pic of one of the Ross blower pistons I used, with tapered tool steel pins. Notice how far down the ring grooves are.

Nice piston,not to thin by the valve pocket where itis had trouble.

GOTBOOST!New improved with Victor heads.
http://www.enginelabs.com/mopar-big-bloc...t-of-necessity/