Ported Heads

N8Dogg98

15 Year Member

Apr 4, 2005

3,872

238

184

MN

Mar 10, 2009

#1

• Mar 10, 2009

• #1

Hey guys, at some point I will be buying some ported PI heads for my car and I found these heads on e-bay. They're 1,050 for a stage 2 port/polish, oversized SI valves, and beehive springs. The stage 1 heads with stock valves and stock springs are only 695. This seems like a better deal than buying used PI heads and having them cleaned up and rebuilt. The stage 2 heads don't really look like any work was put into polishing the combustion chamber. Before I do anything, I wanted to hear some of your opinions first. Thanks

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Stan Weiss

Member

Dec 8, 2006

347

2

16

Philadelphia, PA

Mar 10, 2009

#2

• Mar 10, 2009

• #2

More information about the heads is needed to comment. The is no standards for stage 1 or stage 2, so it has a different meaning for different heads. Do they list flow numbers? Here is a link to my table of Cylinder Heads Flow Data at 28" H2O. Stan Weiss' - Cylinder Head Flow Data at 28 Inches of Water and scroll down to "Modular"

 

flstang65

10 Year Member

Dec 6, 2007

1,484

135

94

SE Georgia

Mar 10, 2009

#3

• Mar 10, 2009

• #3

id just get a set of new patriot heads for about the same price. i stay away from ebay like its tha plague.

 

crazystang25

Member

Jan 25, 2009

492

0

16

Mar 10, 2009

#4

• Mar 10, 2009

• #4

well i have heard of modular head shop, they said they are gonna be sellin the new tf heads when they come out.

 

Green&GoldGT

Member

Aug 1, 2005

302

0

17

Virginia

Mar 10, 2009

#5

• Mar 10, 2009

• #5

Nick McKinney owns modular head shop, and he is very knowledgable when it comes to porting modular heads. Quality is an A+. He strives for velocity instead of advertising big cfm numbers that other companies do. I believe he mills the heads too for added compression. He posts over on the modular revolution boards if you have any questions.

As for the chamber, taking the swirl dam out loses flow as well as compression. The most that should be done to it is laying it back a little.

 

A

AntiRice98

Member

Dec 6, 2005

158

0

16

Mar 10, 2009

#6

• Mar 10, 2009

• #6

I would buy a set of regular PI heads...used or new, doesn't matter. Do some research and find a good guy to port and polish them. I had my heads ported by Chis at Champion racing on the east coast of Florida and I just put down 318rwhp and 350rtq with stock UD pulleys and a OK tune.