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C3 Open Discussion General and technical C3 Corvette discussion - ownership, maintenance, repairs, modifications, restoration |
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01-20-2011, 11:56am | #1 | ||||||
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Head gaskets?
Hi guys, posted this on the 'other' site, but I guess all the gurus have moved over herre, so I'll give it a shot again!
I'm getting some work done on my heads and reassembling soon and have a couple of questions for the gurus on here! I have a stock short block (codes: P/n: 397001, appl: CNR) and I plan to put on a pair of 113 L98 alum heads. Just getting a mild port match and polish the chambers, and new hardware installed, adding 1.6" exhaust valves to opened track. At any rate, my question is, what compression ratio do you expect I might get with stock replacement sized head gasket? And if too high, what thickness should I get to have approx 9.5:1? Don't want to go much higher, but not too low either! Thanks! Paul |
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01-20-2011, 9:46pm | #2 | ||||||
Barn Raising I,II,III
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Not enough info.
Need to know what pistons you have, and what compression ratio they're expected to have with a specific head volume. Or.... what was the compression ratio with those heads and some known piston? Need to know a starting point in order to work things out. Regardless, a head gasket change isn't going to change the compression ratio more than about .2-.3. If you're already running premium fuel, go with some thin copper gaskets. They should be fine if the block & heads surfaces are good. |
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