Has anyone done it before? Once the exhaust manifold gasket is placed on the head there is at least 3-5mm of room to port on the very outside. Has anyone actually done it? I dont want to go too far and end up going through one of the water lines in there or something.
Anyone?

 

To get optimal gains from porting a head, there are certain shapes and angles that you want to maintain for max flow..you can overport also, which can lead to problems..The K20A can benefit from porting, but I would recommend taking it to a reputable machinist..

 

I work at a shop where we have reputable machineists
We are just not too sure how far we can go with the overport.
Thanks for the info though

 

i would get another head and see how far you can go wiht it..

 

Not to be a dick, but a qualified/reputable automotive machinist should be able to tell upon examination..

 

Well, how about you let me know how to tell then?

 

well, what setup are you looking for..

Is it all-motor, supercharged, turbo, etc??

Different applications benefit from different work; you don't just want to take it as far as you can possibly go; that will not always yield max power..

 

Unless you have a flow bench, you are playing with a possible expensive mistake.
Even Comptech said for stock cams and small cams, porting of the head are not necessary. In fact porting them might result in lower HP number.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Andrie &raquo;</TD></TR><TR><TD CLASS="quote">Unless you have a flow bench, you are playing with a possible expensive mistake.
Even Comptech said for stock cams and small cams, porting of the head are not necessary. In fact porting them might result in lower HP number.</TD></TR></TABLE>

Yeah thats what I'm explaining to him; setup is key when doing this kind of work..