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Quench & Compression ? for LQ4

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Old 07-30-2009, 05:14 PM
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Default Quench & Compression ? for LQ4
Does anyone know what the stock gasket thickness is on an 05 LQ4?

Does anyone know what the Stock piston to head clearence is?

How thin of a gasket can you go with a stock rotating assembly keeping it under 6000 RPM?

wanting to get a thinner gasket or mill the head or combo of both to get about 9.8 - 10 : 1 comp.
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Old 07-30-2009, 07:04 PM
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Stock gasket is .051, not sure what size gaskets is avail from cometic, but I have a .020 and am right about 9.8-1...
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Old 07-30-2009, 07:40 PM
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doesn't the piston stick up .008 above the deck? or is that not a LQ4?

Does your piston kiss the head?
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Old 07-30-2009, 07:52 PM
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As I recall I didn't think that it did but not 100%
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Old 08-05-2009, 07:33 PM
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anyone else?
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Old 08-07-2009, 09:30 AM
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hello, is anyone out there?
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Old 08-07-2009, 03:07 PM
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I think the piston sticks up .007 out of the hole. .020 is a thin head gasket IMO, but since the LQ4 has that wide dish, it would benefit the quench with the thinner gasket.
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Old 08-09-2009, 05:55 PM
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Really need to measure deck height to be sure. it CAN very from block to block...
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Old 08-10-2009, 12:12 AM
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How thin of a gasket can you go with a stock rotating assembly keeping it under 6000 RPM?
Anyone have any thoughts?
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