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Re: HEAD MILLAGE
[Re: Magnumguy]
#2554964
09/26/18 11:44 AM
09/26/18 11:44 AM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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for a start I would mockup & check the "height" of the "V" (bolt hole alignment is an OK check for this on a DD) & it sounds like this is a stock rebuild) & for sure see if the surfaces (head/intake) are FLAT. vac leaks are the cats' a$$. check/mill em flat/mockup/THEN use the right thickness gaskets to get everything in the "V" lined up adequately. to Keep It Simple Sam, a slight milling should present no problems but do mockup & go from there.
live every 24 hour block of time like it's your last day on earth
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Re: HEAD MILLAGE
[Re: dogdays]
#2555227
09/26/18 09:49 PM
09/26/18 09:49 PM
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Joined: Feb 2005
Posts: 4,333 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,333
Prospect, PA
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Putting aside all intake manifold fitment issues, most people would tell you 0.060" is the max. However, a few years ago we had a member who had milled his open chamber heads far enough that they became closed chamber heads. I think that was 0.080" or 0.090". As I recall he opened up the top side of the ports in his heads and didn't cut the manifold.
R. I've seen 0.090" too. I assume he enlarged the bolt holes too if he did not mill the intake port side of the head or manifold. The 0.00123:0.001 ratio is correct.
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