Would this hurt my heads?

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Sep 18, 2012 | 01:09 PM

WVhuggerSS

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From: WV

Would this hurt my heads?

I have a set of cnc ported heads and would like to know if it would make them flow more if I took a flapper wheel and smoothed them up more where the machine lines are on the intake ports?

Sep 18, 2012 | 01:24 PM

thunderstruck507

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leave them alone or you will do more harm than good

Last edited by thunderstruck507; Sep 18, 2012 at 04:41 PM.

Sep 18, 2012 | 04:26 PM

RAMPANT

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Yes, you get better flow with the machining step overs. Not as pretty, but more power.

Sep 19, 2012 | 11:42 AM

WVhuggerSS

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From: WV

Thanks for the input guys, haha I will leave them alone then!

Sep 19, 2012 | 11:51 AM

Marc 85Z28

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The CNC ridges are usually beneficial on the intake ports. However, the exhaust ports are just the opposite.

Sep 20, 2012 | 09:52 PM

2000PewterT/A

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Quote:

Originally Posted by Marc 85Z28

The CNC ridges are usually beneficial on the intake ports. However, the exhaust ports are just the opposite.

Agreed, everyone thinks an intake port should be smooth which is just wrong, it the intake runner needs to be somewhat ruff to help with the A/F homogenization, if it is smooth the air/fuel will not mix properly and cause inefficient combustion. Basically unless you are a professional porter I would leave the heads alone.