Optimal Quench, LS1 to LS6
Optimal Quench, LS1 to LS6 Have 5.7L LS1 and will replace heads w/243 castings. Going to run Cam Motion’s LS 216/224-108+3. Also have LS9 head gasket which I understand has a compressed thickness of 0.051. My experience has been non-LS based engines and most run 0.035-0.040 quench. I assume that applies to the LS world also?
I don’t know the position of the piston in the hole for the stock LS1 but it seems like 0.051 is a little to large for quench. Was going to have head surface milled to be sure its straight – perhaps on 0.010” and that would also give me a good quench.
So I’m sure this situation has come up before so looking for input to approach. Thanks.
I don’t know the position of the piston in the hole for the stock LS1 but it seems like 0.051 is a little to large for quench. Was going to have head surface milled to be sure its straight – perhaps on 0.010” and that would also give me a good quench.
So I’m sure this situation has come up before so looking for input to approach. Thanks.
TECH Senior Member
Joined: Jun 2016
Posts: 22,291
Likes: 3,616
From: Central Cal.
Generally speaking, you want about a.040 head gasket to get the quench close to where you want it.
I'm surprised GM didn't make them the standard LS head gasket as this applies to nearly, if not all LS engines.
I'm surprised GM didn't make them the standard LS head gasket as this applies to nearly, if not all LS engines.
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Joined: May 2023
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From: Franconia, PA
Have 5.7L LS1 and will replace heads w/243 castings. Going to run Cam Motion’s LS 216/224-108+3. Also have LS9 head gasket which I understand has a compressed thickness of 0.051. My experience has been non-LS based engines and most run 0.035-0.040 quench. I assume that applies to the LS world also?
I don’t know the position of the piston in the hole for the stock LS1 but it seems like 0.051 is a little to large for quench. Was going to have head surface milled to be sure its straight – perhaps on 0.010” and that would also give me a good quench.
So I’m sure this situation has come up before so looking for input to approach. Thanks.
I don’t know the position of the piston in the hole for the stock LS1 but it seems like 0.051 is a little to large for quench. Was going to have head surface milled to be sure its straight – perhaps on 0.010” and that would also give me a good quench.
So I’m sure this situation has come up before so looking for input to approach. Thanks.
66 Nova, T56, 3.73:1 Tru-Trac. Thanks for link - looks like peak hp @ 5800 and nice flat torque curve. Exactly what I'm looking for in a street cam only.
Thinking about this for a moment, milling the heads will not impact quench. But a little research indicates LS1 pistons out of the hole ranges from 0.003-0.010" Need to measure mine when I tear it down. May still be able to use LS9 gasket if ot of hole is large enough.
Thinking about this for a moment, milling the heads will not impact quench. But a little research indicates LS1 pistons out of the hole ranges from 0.003-0.010" Need to measure mine when I tear it down. May still be able to use LS9 gasket if ot of hole is large enough.
Last edited by BBPanel; Dec 23, 2024 at 08:08 PM.
Have 5.7L LS1 and will replace heads w/243 castings. Going to run Cam Motion’s LS 216/224-108+3. Also have LS9 head gasket which I understand has a compressed thickness of 0.051. My experience has been non-LS based engines and most run 0.035-0.040 quench. I assume that applies to the LS world also?
I don’t know the position of the piston in the hole for the stock LS1 but it seems like 0.051 is a little to large for quench. Was going to have head surface milled to be sure its straight – perhaps on 0.010” and that would also give me a good quench.
So I’m sure this situation has come up before so looking for input to approach. Thanks.
I don’t know the position of the piston in the hole for the stock LS1 but it seems like 0.051 is a little to large for quench. Was going to have head surface milled to be sure its straight – perhaps on 0.010” and that would also give me a good quench.
So I’m sure this situation has come up before so looking for input to approach. Thanks.
I assume something like this will work - pretty pricey:
https://www.summitracing.com/search/...=245-C5475-040
G Atsma, does GM not make a 0.040 head gasket even now?
https://www.summitracing.com/search/...=245-C5475-040
G Atsma, does GM not make a 0.040 head gasket even now?
TECH Senior Member
Joined: Jun 2016
Posts: 22,291
Likes: 3,616
From: Central Cal.
I assume something like this will work - pretty pricey:
https://www.summitracing.com/search/...=245-C5475-040
G Atsma, does GM not make a 0.040 head gasket even now?
https://www.summitracing.com/search/...=245-C5475-040
G Atsma, does GM not make a 0.040 head gasket even now?
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I assume something like this will work - pretty pricey:
https://www.summitracing.com/search/...=245-C5475-040
G Atsma, does GM not make a 0.040 head gasket even now?
https://www.summitracing.com/search/...=245-C5475-040
G Atsma, does GM not make a 0.040 head gasket even now?
Ws6store.com has a good price on those gaskets
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