milling/porting heads.
10-17-2007, 08:16 PM
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milling/porting heads. I'll be pulling the heads off this weekend to hopefully diagnose a problem. and while they are off im thinking of having them ported and possibly milled?
they are Non CNC'd ported DART heads.
205cc intake 62cc combustion chamber 2.02/1.60
what can I expect from porting them? what about milling them down to 59cc chambers? what about both? I really don't know a whole lot about the whole process and what to expect.
what are the pros to milling compared to porting and vice versa?
im perfectly fine with buying new pushrods (diff length) as I may have to replace them anyway.
so explain to me whats up guys?
Chad
they are Non CNC'd ported DART heads.
205cc intake 62cc combustion chamber 2.02/1.60
what can I expect from porting them? what about milling them down to 59cc chambers? what about both? I really don't know a whole lot about the whole process and what to expect.
what are the pros to milling compared to porting and vice versa?
im perfectly fine with buying new pushrods (diff length) as I may have to replace them anyway.
so explain to me whats up guys?
Chad
10-17-2007, 08:24 PM
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Milling can/will resurface the mating surfaces.I.E. if you have a warped engine head or to raise compression.Porting enlarges the intake and/or exhaust ports on the head for more air flow, intake and or exhaust.(in a nut shell) hope this helps.
10-17-2007, 08:30 PM
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doesn't milling reduce teh size of the combustion chamber? and porting enlarge it? it sounds like its counter productive? or am I totally off?
I wouldn't mind bumping compression up a little bit. Im at stock now.
Chad
10-17-2007, 08:40 PM
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Close, milling does raise the c/r but remember your talking thousanths of an inch.Porting in the combustion chamber is should be left to pro's(imho).
The 205's in your sig shouldn't need much to raise the c/r. Its kinda' up to the individual as far as how much to mill or port.$.02
The 205's in your sig shouldn't need much to raise the c/r. Its kinda' up to the individual as far as how much to mill or port.$.02
