Re: Edmunds head

Posted by Ross On 2011/3/20 19:32:53

Starting with the definition of compression ratio as volume of the cylinder plus the volume of the head divided by the the volume of the cylinder, a 288 with Ultra and the standard 7.5:1 head should have a head volume of 5.53 cubic inches. Then if we work that backwards using the cylinder volume of a 327 the compression ratio is (40.875+5.53)/5.53= 8.4 to one.

You are probably halfway to the performance of a 359 without the notorious cracking problems.