Question on combustion chamber variance
08-09-2005, 08:49 PM
#1
Staging Lane
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Question on combustion chamber variance Hey guys here's the story. I had my heads milled Three times 
. I wanted to take off .030 but the shop that did it couldn't get them smooth enough to seal so they tried again and I finally took them elsewhere and got them smoothed out to an ra of 9-15 so they should seal this time. any way I was cc'ing the chambers and on one head the smallest was 59cc and the largest on the other end of the head is 61cc is this enough of a differance to cause a problem? if so what kind of problem? is there anything I can do to correct this issue? I am calculating cr right now thanks for any input.
. I wanted to take off .030 but the shop that did it couldn't get them smooth enough to seal so they tried again and I finally took them elsewhere and got them smoothed out to an ra of 9-15 so they should seal this time. any way I was cc'ing the chambers and on one head the smallest was 59cc and the largest on the other end of the head is 61cc is this enough of a differance to cause a problem? if so what kind of problem? is there anything I can do to correct this issue? I am calculating cr right now thanks for any input. 
08-10-2005, 02:47 AM
#2
TECH Senior Member
a 2 cc difference is too much, see if you can hand blend the smaller ones and open the chambers a little. I would try to keep them with less than 1 cc difference.
