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Custom bore size Cometic head gaskets

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Old Jan 19, 2007 | 01:49 PM
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Default Custom bore size Cometic head gaskets

Looking for opinions here...

The standard Bore opening size for Cometic MLS LS1/LS6 head gaskets is 3.910". The physical cylinder bore size by specification is 3.898". What is considered the safest minimum gasket opening size for the cylinder bore? I think I have heard of 3.903's. Can it even go tighter?

And yes, i realize chasing the tightest gasket opening to bore size is probably a waste of time, none the less, let's entertain this idea.

Hammer
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Old Jan 19, 2007 | 01:51 PM
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call cometic and ask about it, maybe they can hook it up somehow.
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Old Jan 19, 2007 | 01:56 PM
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Originally Posted by brad8266
call cometic and ask about it, maybe they can hook it up somehow.
I was planning on to...I just wanted to see what has actually been known around here to succesfully work before I did.

Hammer
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Old Jan 19, 2007 | 05:07 PM
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Originally Posted by thehammer69
Looking for opinions here...

The standard Bore opening size for Cometic MLS LS1/LS6 head gaskets is 3.910". The physical cylinder bore size by specification is 3.898". What is considered the safest minimum gasket opening size for the cylinder bore? I think I have heard of 3.903's. Can it even go tighter?

And yes, i realize chasing the tightest gasket opening to bore size is probably a waste of time, none the less, let's entertain this idea.

Hammer
you must be really trying to squeeze all the compression out of this thing. i would use 3.910 and call it a day, .007 won't change enough to even notice. cometic will cut you anything you want.
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Old Jan 19, 2007 | 05:17 PM
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Originally Posted by JPH
you must be really trying to squeeze all the compression out of this thing. i would use 3.910 and call it a day, .007 won't change enough to even notice. cometic will cut you anything you want.
Just trying to maximize quench without going under .040" gasket thickness.

Hammer
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