Re: milling heads

[ed keaton <gtx69@xxxxxxx>]

I am milling a set of 452's.Had the heads cc they checked out at 92 cc need to get down to 88 cc.That is why I need to know how much does each .010 milled off reduce the cc by.
  ----- Original Message ----- 
  From: Steven Charette<mailto:stevec@xxxxxxxxxxxxxxxxxxxx> 
  To: 1962to1965mopars@xxxxxxxxxx<mailto:1962to1965mopars@xxxxxxxxxx> 
  Sent: Friday, February 19, 2010 11:39 AM
  Subject: RE: milling heads



  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?
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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.