RE: milling heads

[Steven Charette <stevec@xxxxxxxxxxxxxxxxxxxx>]

Ed,
	What heads are you milling?  It depends on if the heads are open or
closed chamber - milling an open chamber head will reduce the chamber volume
by more than milling a closed chamber head.

	Without crunching the numbers (I can get you the formulas if needed)
the old DC performance Bible states that (and I'll paraphrase) milling the
late model open chamber heads .060" increases compression 1.5 points, so
.010" would get you roughly 1/4 point of compression.  On the older closed
chamber heads ('62-65 vintage) .060" only gets you about 1/2 point, or .08
points at .010"

	For greater accuracy you would have to calculate the area of the
chamber at the head surface, then calculate for volume at .010".  

	For big blocks (can't say whether the angles are the same on others)
mill the intake face .0123" for each .010" milled from the deck surface.

SC

-----Original Message-----
From: ed keaton [mailto:gtx69@xxxxxxx] 
Sent: Wednesday, February 17, 2010 9:04 PM
To: 1962to1965mopars
Subject: milling heads



Any one know for every 010 milled off is equal to how many cc's .How much
off intake size of the head per 010 also?
[Non-text portions of this message have been removed]


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Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

1962 to 1965 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.