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Old 06-14-2007, 11:13 AM   #1
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Default head gaskets l92

Does anyone know what the minimum bore diameter head gasket can be run with l92 heads on an ls2 without having any of the fire ring protruding into the combustion chamber. The combustion chambers are unported. Any help on this would be greatly appreciated.
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Old 06-14-2007, 03:17 PM   #2
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Quote:
Originally Posted by Nice4thgenZ
Does anyone know what the minimum bore diameter head gasket can be run with l92 heads on an ls2 without having any of the fire ring protruding into the combustion chamber. The combustion chambers are unported. Any help on this would be greatly appreciated.
I haven't fired mine up yet but I used 4.085 X .040. You probably don't want to go smaller than that. I think Matt @ SDPD will confirm.

-Jon
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Old 06-14-2007, 03:25 PM   #3
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Correct, we recommend a 4.085" bore gasket (or greater in some cases depending on the bottom end as well). We stock Cometic and GM gaskets that will get you taken care of. Feel free to PM or call me if I can help!
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Old 06-14-2007, 10:32 PM   #4
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I thought standard bore on a L92 was 4.065"? Why would you have to go any bigger with those heads?
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Old 06-15-2007, 07:12 PM   #5
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I believe the reason is to prevent the gasket from hangin out into the large chambers which can cause gasket failure and shrouding of the valves.
Even if you are running a 4.0 bore you will need to use the 6.2 gaskets
(4.085) just to be safe.
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Old 06-15-2007, 07:35 PM   #6
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Along with larger gaskets what is the number for replacement head bolts or studs ARP? Are you using stock length push rods also? Thanks (I just got my L92 heads & have Manley valves for them & retainers (ti). Trying to get all the things together like head gaskets & etc.
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Old 06-16-2007, 05:13 PM   #7
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The stud kit P/N is ARP 234-4317.
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