Posted by Matt Wilson [172.69.65.40] on Tuesday, November 07, 2023 at 01:04:31 :
In Reply to: typo posted by Kaegi [162.158.146.73] on Monday, November 06, 2023 at 18:13:48 :
Before machining, the chambers cc'd between 98 and 101 cc's.
After machining, they were 94 to 96.
With the milling of the head and the overbore and the stroke increase (converting from 251 to 265), the compression ratio will be about 8:1.
My cam grinder didn't increase the lift but after getting the head milled 0.015", I still checked the valve clearance to the combustion chamber using modeling clay. The smallest clearances were on the order of 0.090", including head gasket thickness. I took the measurements with no head gasket (head flat against the block and bolted down loosely) and then added the compressed gasket thickness as stated on the Best gasket website (0.052") to get about 0.090".