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Old 10-28-2021, 09:48 PM   #3
burnin oil
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Join Date: Jan 2013
Location: Eastern TN
Posts: 1,919
Re: What head gaskets for aluminum heads?

Al is spot on. You need a gasket that doesn't have exposed metal. The issue here is that, like al said, they are all in the 40 range. This requires a zero deck or slightly protruding piston for ultimate quench. Check your short block piston depth at TDC and valve clearance. Valve clearance is number 1. If that is good determine the the thinnest gasket possible that gets you close to 32 thousandths for best quench. Odds are that you are on the positive side of the number and have to rely on good head design and timing curve to run pump gas. The higher the static compression the more you have to worry. If you need a really thin gasket you can add a coating to a steal shim gasket. There are spray on or paint on alternatives that can help. Essentially you add an aluminum or copper layer to the head gasket to protect the block and head from galvanic deteriation. These work well but require a near perfect head and block surface. For mild performance motors I have had good luck with felpro permatorque gaskets but they are a little thick for optimal quench. Playing with summits filters should net you a head gasket that works. Just be warned that it might be expensive!!!
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