Generation III Internal Engine 1997-2006 LS1 | LS6
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What head gasket

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Old May 3, 2014 | 09:05 AM
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Exira's Avatar
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Default What head gasket

6.0 bored .030 with flat tops

going to run cometic .040 but do I need 4.060 or 4.080
any input would be great

also have l92 heads shaved .015 and intake with 90mm tb

also have any input on a cam, have had these 2 recommended
its going into a heavy truck, so keeping torque in mind and ptv clearance

227 231 .605 .598 113+4
224 228 .629 .629 112+4
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Old May 3, 2014 | 10:55 AM
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You need the ls3 head gaskets, look on summit racing, they are reasonably priced
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Old May 3, 2014 | 10:59 AM
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Here is a Chevrolet performance part number, 12610046
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Old May 3, 2014 | 11:53 AM
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I was wanting .040 for a little more bump in compression, those are .051, but a hell of a lot cheaper than cometic
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Old May 5, 2014 | 02:08 PM
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Originally Posted by Exira
I was wanting .040 for a little more bump in compression, those are .051, but a hell of a lot cheaper than cometic
Never use the head gasket to adjust the static compression. What little bit you might gain or lose is more than offset by the improper quench. Measure your deck height, and choose the head gasket that will get your quench as close to 0.040" without going under by much.

Too much quench area will detonate like mad. Much worse than a little bit too much static compression.

If this is a tow vehicle and you're willing to set the redline around 5,000-5,500 rpm's, you could gain a little bit of efficiency by using a little less quench.
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