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| jaa1992 | Help me choose a head gasket | ||
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Guru
 
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1992 LT1, replacing the head gaskets.
Have a set of LT1 heads that were milled from 54cc to 52cc Would like to keep compression as close to stock as possible. So what thickness head gasket should I look for? Any particular brand? TIA! |
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Posted on: 2008/2/18 1:13
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| Notorious | RE:Help me choose a head gasket | ||
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Elite Guru
 
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I'd just go with the GM stock replacements which are .049" You'll have to do the math to be sure, but I can't see you going beyond a tenth or two of gain beyond the SCR of 10.4:1. In other words, you won't go beyond 10.6:1 at the most. I've run as high as a 11.3:1 SCR in my LT1 with no issues whatsoever. I'm currently running right at 11:1 with no problems. It's a daily driver and is quite happy on 93 octane pump gas.
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Posted on: 2008/2/18 2:59
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| jaa1992 | RE:Help me choose a head gasket | ||
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Wasn't sure if I needed to go a little thicker or not.
Anyone have a reason for not going with something like the Felpro 9966PT "Head Gasket, PermaTorqueMLS, Chevy, 5.7L, LT1/LT4" ? Going with new ARP head bolts, lube and sealant. Thanks! I'll check this in the AM before I head out to Summit tomorrow. |
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Posted on: 2008/2/18 4:05
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| LT4BUD | RE:Help me choose a head gasket | ||
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Quote:
I'd just go with the GM stock replacements which are .049" You'll have to do the math to be sure, but I can't see you going beyond a tenth or two of gain beyond the SCR of 10.4:1. In other words, you won't go beyond 10.6:1 at the most. . Some math that is pretty close 5700/8=712.5cc per cylinder 712.5/10.4=68.5cc if take away 2cc from head milling you end up with 66.5cc 712.5/66.5=10.7 compression ratio... 10.7 should not be a problem, just use standard gasket BTW GM head gasket 10168457 has a compressed thickness of .050 per the GM performance parts catalog..Pretty sure this is the OEM LT1 head gasket for aluminum heads  |
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Posted on: 2008/2/18 14:49
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| MK 82 | RE:Help me choose a head gasket | ||
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Senior Guru
 
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I personally would use the LT4 gasket. It has a steel fire ring. As far as I know, it will fit.
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Posted on: 2008/2/18 14:51
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96 CE Roadster LT4 |
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| LT4BUD | RE:Help me choose a head gasket | ||
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Quote:
I personally would use the LT4 gasket. It has a steel fire ring. As far as I know, it will fit. The LT4 head gasket is .043...this would give him an even higher compression ratio which he is not after... |
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Posted on: 2008/2/18 15:58
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