Raising cylinder compression
Club Member
Joined: Mar 2016
Posts: 11,688
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From: Clearwater, Idaho
Assuming a stock 0.045" gasket, a 0.030" gasket would get the OP to right at 10.7:1. Not quite there. Personally, a 0.010" cleanup cut with the thinner gasket is how I would go.
Club Member
Joined: Mar 2016
Posts: 11,688
Likes: 22,279
From: Clearwater, Idaho
Stock head gaskets are 0.045" on Twin Cams. Just to confirm, I checked a head gasket recently pulled from my bike. 0.046".
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Joined: Dec 2007
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Best to clean/prep, then cc the chambers.
Then the guesswork will be in the rear view mirror.
Scott
Then the guesswork will be in the rear view mirror.
Scott
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Joined: Sep 2009
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From: deland,florida
100% agree`d.if you don't have the facilities to cc mill the heads to do the job properly,use a shop that can
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From: harrow ont can
I had them done but they never recorded the numbers. My ccp is 195 warm. We are planning to remove the heads and installing a .030 gasket in place of the factory one. At that time we will record the size. With that stated is my ccp going to be to high for pump gas. I do not want to go above 210.