Smoothing out PI Heads

97redgt · April 3rd, 2008, 12:50 PM

I have a set of 04 pi heads with 25k on em and they have all new valve seals and were steam cleaned. The intake and exhaust ports seem to have rough ports i guess from the factory. Would it be bad to take a low grit sand paper and smooth these things out? I not going crazy and not reshaping the ports or anything like that. Just smoothing them out to where my fingers will reach. I could get any left over shavings with a shop vac so not worried about that. Just wondering if it would be a bad thing at all.

HBK_2007 · May 11th, 2008, 10:21 PM

thats more or less what polishing does

Boomer · May 11th, 2008, 11:38 PM

Chances are you will not gain anything. A rough surface actually creates a cushion of air and speed up the velocity of air. Smoothing the surfaces in the wrong areas can and will slow the air enough to cause turbulance that can effect airflow and performance. Better to pay someone to do it right or not listen and let someone say "told you so".

HBK_2007 · May 11th, 2008, 11:43 PM

+15245741565

RandoGT · May 12th, 2008, 01:11 AM

could just pay Boomer to do it ;]

April 3rd, 2008, 12:50 PM	#1
97redgt Regular Join Date: Apr 2007 Location: Quakertown, PA Posts: 86	Smoothing out PI Heads I have a set of 04 pi heads with 25k on em and they have all new valve seals and were steam cleaned. The intake and exhaust ports seem to have rough ports i guess from the factory. Would it be bad to take a low grit sand paper and smooth these things out? I not going crazy and not reshaping the ports or anything like that. Just smoothing them out to where my fingers will reach. I could get any left over shavings with a shop vac so not worried about that. Just wondering if it would be a bad thing at all. __________________ steeda tri-ax, pypes catback & o/r x, BBK shorties, K&N cai, Full PI Swap, pro-m 80mm maf, 75mm tb and c&l plenum, steeda ud's, screamin demon cp's and ford racing 9mm wires, fox 4cyl front springs 260rwhp 290rwtq

May 11th, 2008, 10:21 PM	#2
HBK_2007 Enthusiast 1996 Mustang GT next year Join Date: Jan 2008 Location: Wyoming Posts: 661	thats more or less what polishing does __________________ JLT Ram Air Intake, Otherwise stock

May 11th, 2008, 11:38 PM	#3
Boomer Enthusiast Join Date: Oct 2006 Location: warren, Mi Posts: 748	Chances are you will not gain anything. A rough surface actually creates a cushion of air and speed up the velocity of air. Smoothing the surfaces in the wrong areas can and will slow the air enough to cause turbulance that can effect airflow and performance. Better to pay someone to do it right or not listen and let someone say "told you so". __________________ Just another 10 second Mustang, what did you expect ? http://youtube.com/watch?v=BgykaUrmfvM

May 11th, 2008, 11:43 PM	#4
HBK_2007 Enthusiast 1996 Mustang GT next year Join Date: Jan 2008 Location: Wyoming Posts: 661	+15245741565 __________________ JLT Ram Air Intake, Otherwise stock

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May 12th, 2008, 01:11 AM	#5
RandoGT Enthusiast 1998 Mustang GT Need to hit the track Join Date: May 2007 Location: Katy, TX Posts: 811	could just pay Boomer to do it ;]

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