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Jeff Chambers · 12-29-2005, 08:02 AM

At 60cc you're not going to get to 10.5:1 with flat tops and big valve reliefs. Even 9.5 is going to be tough; its looking more like 9.2-9.4:1 depending on where the piston is relative to the deck (http://crt-performance.com/compression.htm). Generally speaking, a full point of compression (say from 9.5 to 10.5) is worth about 15% net power at the crank.

12-29-2005, 08:02 AM	#2
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	Re: Compresstion Help At 60cc you're not going to get to 10.5:1 with flat tops and big valve reliefs. Even 9.5 is going to be tough; its looking more like 9.2-9.4:1 depending on where the piston is relative to the deck (http://crt-performance.com/compression.htm). Generally speaking, a full point of compression (say from 9.5 to 10.5) is worth about 15% net power at the crank. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"