milling heads and compression
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Joined: Mar 2002
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From: fairborn, ohio
milling heads and compression
my motor is currently 9.5:1 compression with a 64cc head and a .015" head gasket. how many 1/1000th would i have to shave off the heads to get around 10.0:1 compression?
Joined: Mar 2000
Posts: 43,187
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From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
According to their website (www.worldcastings.com):
"Approximate milling guideline (varies with depth): .0065" per cc. Mill roughly 10cc for each compression point."
So, reduce by 5cc, times .0065"/cc: start with .030" and measure resulting volume. Should be close.
Be sure to have the intake manifold shaved, too.
"Approximate milling guideline (varies with depth): .0065" per cc. Mill roughly 10cc for each compression point."
So, reduce by 5cc, times .0065"/cc: start with .030" and measure resulting volume. Should be close.
Be sure to have the intake manifold shaved, too.
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