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Head Milling question?

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Old 09-08-2012, 01:19 PM
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Default Head Milling question?

How much would you have to mill a set of 853 heads to get a 62cc chamber?

Also what would the compression be at this point? I'm thinking somewhere in the 10.8:1 to 11:1 range. Or am I way off? (everything else being stock ie. stock head gasket thickness, bore, stroke, and pistons)

And if this was done would I have to worry about PTV? (Cam is currently a MTI SII Cam 224 220 .581 .581 116)

Also how big a cam could I go with if I used this head combination and still maintain proper PTV without fly cutting the pistons?
Old 09-08-2012, 01:51 PM
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853's are 66.67cc

66.67
-62.00
=4.67ccx.007=0.03269

Mill about 0.033"

Last edited by dgcustomz; 09-08-2012 at 02:06 PM.
Old 09-08-2012, 02:02 PM
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3.898 bore
3.622 stroke
8 cylinder
62cc
0.050 headgasket
=10.87 compression

Head gasket is actually a stock 0.054 gasket but after it's compressed it's closer to a 0.050 .
Old 09-09-2012, 09:46 AM
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Anyone on the PTV issue or the max size cam I could run with these heads? (853 heads milled about 0.033" with stock MLS gasket)



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