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Old 06-16-2008, 04:06 AM
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What head gasket for my SBC

Was running what looks like a stock ~0.039" compressed gasket. However, that would mean a ~0.064" quench area. Thinking of installing Felpro 0.015" gaskets on re-assembly to get a 0.040" quench area. However, my current CR is 9.38:1, so the Felpros would push that up to ~9.9:1 with my iron heads.

What do you guys think? Stick with stock gaskets, or go for the 0.015" items? What would that gain me in performance?

Thanks,
Ian.

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Old 06-16-2008, 04:55 AM
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Quote:
Originally Posted by v8hed
Was running what looks like a stock ~0.039" compressed gasket. However, that would mean a ~0.064" quench area. Thinking of installing Felpro 0.015" gaskets on re-assembly to get a 0.040" quench area. However, my current CR is 9.38:1, so the Felpros would push that up to ~9.9:1 with my iron heads.

What do you guys think? Stick with stock gaskets, or go for the 0.015" items? What would that gain me in performance?

Thanks,
Ian.
With iron heads the the coated .015 gaskets will work. The .040 quench will also help guard against detonation so the extra compression will not be as bad. You may need to up the octane a little and adjust ignition timing. What heads are you using? Not sure how much performance will increase.
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Old 06-16-2008, 05:14 AM
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Use cooler heat range non projected tip spark plugs.
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Old 06-16-2008, 05:18 AM
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Originally Posted by F-BIRD'88
Use cooler heat range non projected tip spark plugs.
I was going to use NGK BP5FS. Is that too hot?
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Old 06-16-2008, 06:22 AM
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Originally Posted by v8hed
I was going to use NGK BP5FS. Is that too hot?
use a NGK BR6FS or BR7FS Autolite 144 Champion RV8C or AC Delco R42T

Gap at .035"
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