How much would you have to mill a 60CC head to get 58CC's?
11-09-2008, 05:23 PM
#1
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How much would you have to mill a 60CC head to get 58CC's?
Just like the title says, how much would you need to mill off a 60CC AFR 185 head to arrive at a 58CC chamber? 10 thousandths? 20 thousandths? more?
11-09-2008, 05:49 PM
#4
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if you mill the head, therefore removing material, you are going to make it bigger
i figure because its a 60 Cubic Centimeter chamber
which means you can fit 60 Cubic Centimeters of air into it at 1 ATM
a 58 Cubic Centimeter chamber means you can fit 58 cubic centimeters into it
which means the 58 has a SMALLER chamber, which means there is more material...
i figure because its a 60 Cubic Centimeter chamber
which means you can fit 60 Cubic Centimeters of air into it at 1 ATM
a 58 Cubic Centimeter chamber means you can fit 58 cubic centimeters into it
which means the 58 has a SMALLER chamber, which means there is more material...
11-09-2008, 05:56 PM
#6
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Location: Sandusky,OH
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umm.....iam with steve on this one...i thought shaving material will make the combustion chamber smaller....creating more compression...i mean you may be right dude but....to me that only makes sense,i dunno how bout this...call a machine shop or an engine builder???
11-09-2008, 05:58 PM
#7
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if you mill the head, therefore removing material, you are going to make it bigger
i figure because its a 60 Cubic Centimeter chamber
which means you can fit 60 Cubic Centimeters of air into it at 1 ATM
a 58 Cubic Centimeter chamber means you can fit 58 cubic centimeters into it
which means the 58 has a SMALLER chamber, which means there is more material...
i figure because its a 60 Cubic Centimeter chamber
which means you can fit 60 Cubic Centimeters of air into it at 1 ATM
a 58 Cubic Centimeter chamber means you can fit 58 cubic centimeters into it
which means the 58 has a SMALLER chamber, which means there is more material...
11-09-2008, 06:02 PM
#8
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Here was an email response I got back from AFR a while ago when I asked if I could get their head in a 58CC Chamber with pedestal mount rockers, because for some reason their pedestal heads have 60CC chambers while their stud mount heads have 58CC, this was his response:
Steve,
We can mill the deck on those heads to get you 58cc or even lower if you would like. If you have any other questions feel free to ask.
Thank you for considering AFR,
Eric Underwood
661-257-8124 ext. 123
AFR Tech Dept
Steve,
We can mill the deck on those heads to get you 58cc or even lower if you would like. If you have any other questions feel free to ask.
Thank you for considering AFR,
Eric Underwood
661-257-8124 ext. 123
AFR Tech Dept
11-09-2008, 06:04 PM
#9
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Milling the heads will increase the compression ratio by decreasing the combustion chamber size, this is a fact. He is not talking about milling on the combustion chambers but the head mounting surface. I would say .015" to .020" would get you the 2CC decrease that yu are looking for.
11-09-2008, 06:06 PM
#10
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Milling the heads will increase the compression ratio by decreasing the combustion chamber size, this is a fact. He is not talking about milling on the combustion chambers but the head mounting surface. I would say .015" to .020" would get you the 2CC decrease that yu are looking for.