Compression ratio and head gaskets
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Compression ratio and head gaskets So the new heads will be 64cc and I still need gaskets. Supposedly I will get .5 bump just bolting the heads on then I found this:
With 64cc chambers and .056" head gasket SC=10.61 DC=7.91
With 64cc chambers and .040" head gasket SC=11.04 DC=8.22
So if I use the Cometic .040's I will have 11:1. How much power will that net realistically? Trying to judge if the $140 over MLS GM's and possibly having problems running pump 92 would be a problem.
With 64cc chambers and .056" head gasket SC=10.61 DC=7.91
With 64cc chambers and .040" head gasket SC=11.04 DC=8.22
So if I use the Cometic .040's I will have 11:1. How much power will that net realistically? Trying to judge if the $140 over MLS GM's and possibly having problems running pump 92 would be a problem.
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So the new heads will be 64cc and I still need gaskets. Supposedly I will get .5 bump just bolting the heads on then I found this:
With 64cc chambers and .056" head gasket SC=10.61 DC=7.91
With 64cc chambers and .040" head gasket SC=11.04 DC=8.22
So if I use the Cometic .040's I will have 11:1. How much power will that net realistically? Trying to judge if the $140 over MLS GM's and possibly having problems running pump 92 would be a problem.
With 64cc chambers and .056" head gasket SC=10.61 DC=7.91
With 64cc chambers and .040" head gasket SC=11.04 DC=8.22
So if I use the Cometic .040's I will have 11:1. How much power will that net realistically? Trying to judge if the $140 over MLS GM's and possibly having problems running pump 92 would be a problem.
Realisticly about 10hp.
How far above the deck are your pistons, you need t know that also. If you get the wrong gasket the piston may hit the head. It of course will affect the piston to valve clearance too. Much more involved than just putting on a thinner set of gaskets.
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