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head milling 
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Driver

Joined: Jan 13, 2010
Posts: 158
hey guys what is the measurement i can give the machine shop to get a 2.5L head milled down to the highest legal compression. I know there's a way to measure it and i want to be at the limit but want to make sure its still legal. Thanks.


Wed Apr 09, 2014 6:00 am
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Rookie Driver

Joined: Aug 17, 2010
Posts: 12
Hey John,
If I am correct the new PCA SP2 rules are limited by compression only, 10.6 for 2.5 L engines and 10.9 for 2.7 L engines.
They only reference head thickness in SP1 rules.

Jim


Wed Apr 09, 2014 6:54 am
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Driver

Joined: Jan 13, 2010
Posts: 158
My motor has 88 high compression pistons nothing else just wondering what to tell the machine shop I guess they will be able to figure it out somehow I just didn't want I in blind


Wed Apr 09, 2014 8:08 am
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Joined: Nov 05, 2009
Posts: 1634
Location: Isle of Palms, SC
John: You may find some answers here: viewtopic.php?f=7&t=2070&start=40

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Thu Apr 10, 2014 5:13 pm
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