This is topic !!!!!!Port and polish!!!!!! in forum Tech Talk at Northern California Ford Owners  .


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Posted by red5o (Member # 12651) on :
 
When porting and polishing heads how far down the runner do you port out...... I was told about an inch or so [patriot]

[ 2014-05-05, 08:52 PM: Message edited by: red5o ]
 
Posted by brandon151 (Member # 12990) on :
 
well i know they are a little different but ive ported a few motocross bike heads and the deeper you can go in those the better... but the design is way different than runners for a car. i know theres a lot of info online for tips... maybe try google if you havent already.
 
Posted by Stanced Stang (Member # 11891) on :
 
Porting heads is not a job for rookies. You need to do some serious research and understand the shortcomings of the head you are porting before you even think about touching it with a tool. Just hogging out the ports with kill the velocity of the intake charge resulting in worse flow then you started with.
 
Posted by Secnd2nun64 (Member # 1431) on :
 
Just go about 1- 1 1/2 inches in on a port match. I'd just smooth the intake runner with a cartridge roll and then port match the exhaust port to the header your using. Try to give the exhaust side more of a polished look. Just take your time, go slow. I've picked up a 10th in the quarter doing this at a cost of $10 in supplies and time.
 
Posted by wheelsonly (Member # 10220) on :
 
So first off opening the face of the port Is the wrong place to start porting..

First I do a valve job esp.. If I am going to put a larger valve.. I will do 3-7 angles on the int. and drop a plunge cutter in the bowl 90 percent of the valve diameter it will look something like this.. On the exhaust I use a 45 with a .060 seat and a radius Cutter..

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Then I work down in to the port and trim the guides and blend the short side radius get it to look something like this..
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If I do any matching I like to bolt the manifold to the head any
match the runners. Like in these afr to holley manifold..
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Here is some before and after of these stock 243 castings with some before and after numbers..
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[ 2014-05-11, 06:23 PM: Message edited by: wheelsonly ]
 




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