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Head Porting How to and theories
http://www.tmossporting.com/tabid/3682/Default.aspx

For CNC porting
http://www.portcuttingtools.com/
http://www.sfscarbide.com/port-cutting-tools.htm

High $$$$ CNC head porting machine
http://www.millportmachines.com/rhino5.htm
http://www.centroidcnc.com/cylinder_head_cnc.htm

An industry leader Standard Abrasive

http://www.sa-motorsports.com/diyport.aspx

Not sure how much of this will apply to Aircooled heads? But volume and flowing should be the same theories.

http://racingsecrets.com/speedtalk_head_porting.shtml
 

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I have a question for all the head porters and engine builders out there.

Is it or is it not a good idea to port/polish stock heads to get a little more (if anything) out of a stock engine?

Thanks
Rich
 

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buggdude67 said:
I have a question for all the head porters and engine builders out there.

Is it or is it not a good idea to port/polish stock heads to get a little more (if anything) out of a stock engine?

Thanks
Rich
Porting stock heads would be fine. You would make gains. Power is made in the cylinder heads. The better they flow the more power that is made. Take that with a grain of salt.

What I am saying is the valves also have to flow a certain amount as well. I.E valve size and lift and duration from the cam all have to be considered.

In other words again.. A massive port job could be restricted by small valves and small cam.
 

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The best gain will be had in the bowl and a good valve job. Getting rid of the crap directly under the seat and getting a GOOD valve job will make a giant difference. Dont mess with the port unless you know what your doing... :nono:
 

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Jeff Newcomb said:
The best gain will be had in the bowl and a good valve job. Getting rid of the crap directly under the seat and getting a GOOD valve job will make a giant difference. Dont mess with the port unless you know what your doing... :nono:
I don't think Rich would be trying to port his own heads LOL or at least I hope not. I thought It was more of a general question. Porting should be left to the experienced IMO.
 

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Best idea , Talk to Darren ( K-ROC ) :w00t: and that's the truth . heh,heh,heh . Thanx D man they are still runnin greaaaaaaaaaaaaaaaaaaaaat . Dan :yay!:
 

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Brian Sanders said:
I don't think Rich would be trying to port his own heads LOL or at least I hope not. I thought It was more of a general question. Porting should be left to the experienced IMO.
No, I was just curious if it would benifit a stock engine, to get that little extra from it. I would never try to port my own heads.
 

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I've heard exactly what newk said. Get ris of that nasty lip under the seats and smooth it out. Cleaning up the chambers is a good thing also.....make things flow smoothly.
 
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