Cobra_Dusten Member Aug 7, 2005 246 0 16 Marysville, Wa Sep 5, 2005 #1 Sep 5, 2005 #1 Quick question, if a motor makes 10.4:1 compression with a 61Cc combustion chamber, what would be the compression ratio with a stock cobra head?
Quick question, if a motor makes 10.4:1 compression with a 61Cc combustion chamber, what would be the compression ratio with a stock cobra head?
SeventyMach1 Keep it lubed .... keep it straight .... and keep Mar 30, 2005 1,940 3 36 North Carolina Sep 5, 2005 #2 Sep 5, 2005 #2 All I can tell you is that the GT40 heads are 65.6 cc. (some say 65.5 cc, though). I have no idea how to figure it out, though.
All I can tell you is that the GT40 heads are 65.6 cc. (some say 65.5 cc, though). I have no idea how to figure it out, though.
nmcgrawj Advanced Member Sep 28, 2003 3,651 4 68 Indianapolis, IN Sep 5, 2005 #3 Sep 5, 2005 #3 I would take a stab in the dark and say somewhere around 9.5:1 but i dont have any idea for sure
Grn92LX Fidanza Man! Founding Member Jan 14, 2001 6,819 64 129 New York Sep 5, 2005 #4 Sep 5, 2005 #4 If the gt40 heads have as big of a chamber as seventymach1 says, then you would be around 9.8-9.9:1.
Cobra_Dusten Member Aug 7, 2005 246 0 16 Marysville, Wa Sep 6, 2005 #5 Sep 6, 2005 #5 hmmm, that is still a bit higher than i would want to run on a S/C motor...