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Old 08-12-2014, 09:05 AM   #39
68post
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Join Date: Jan 2014
Location: Indpls. , IN
Posts: 795
Re: 400 in the 68 Chevy

Quote:
Originally Posted by Bobby277 View Post
According to summits Compression calculator I could have a compression ratio of 9.72 : 1 with this kit and 64cc vortec heads and a .051 in head gasket? If I go that way. Would like to hear what you have to say.
Am liking the responses guys, this turned out to be a helpful thread!
Your quench distance should be in the vicinity of .041" to .045" , anything wider will likely cause the engine to be octane, and/or timing, sensitive and create a less efficient burn.

Zero decked but with a .051 gasket = a distance of .051 for quench, and that is more than would be ideal.
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