Quote:
Originally Posted by Tom Vaught
Assuming the below engine parameters: Wallace Racing Calculator.
Engine Bore = 4.181"
Engine Stroke = 4.210
Deck Height = .004
CCs in the head = 72
Valve Reliefs = 6.6
Head Gasket Thickness .041"
Head Gasket Bore Diameter = 4.250"
Wallace Racing says you would be at 11.64 Compression Ratio.
So to get to 9 to 1 compression ratio you would need a (Wallace says 8.96)
you would need a Head Gasket that was .170" thick.
FOUR TIMES AS THICK AS THE .041" THICK GASKET THAT HE HAS RIGHT NOW.
RIGHT, BET THAT SUCKER WOULD REALLY SEAL UNDER BOOST. NOT.
Personally I would stay closer to 8.5 or 8.75 to 1 compression ratio and be able to add boost at a later date by using the PROPER parts vs a bandaid super thick head gasket.
Tom V.
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What he say's
I'm running an 8-71 with 7:98:1 on pump gas with 10 LBS of boost.
I pop a couple head gaskets but now I have a timing boost controller
that will make the difference and I plan on spraying mine too.
If you want some of my info call me 269-832-8122 and I'll help as much
as I can. Charlee 66 has good info too.He give me some good information.
GT.