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Topic: !!!!!!Port and polish!!!!!!
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redvenom
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Member # 12651
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posted
When porting and polishing heads how far down the runner do you port out...... I was told about an inch or so ![[patriot]](graemlins/patriot.gif) [ 2014-05-05, 08:52 PM: Message edited by: red5o ]
-------------------- 1990 Gt Some what stock 1993 GT vert-(stolen)
Posts: 623 | From: cali | Registered: Dec 2012
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brandon151
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Member # 12990
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posted
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.
Posts: 70 | From: lincoln | Registered: Jun 2013
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4 CAM FOX
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Member # 11891
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posted
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.
-------------------- "The clutch is on the left. Gas on the right." "What's this one in the middle?" "It's for pussies."
Posts: 1798 | From: NOR*CAL | Registered: Apr 2012
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Secnd2nun64
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Member # 1431
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posted
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.
Posts: 1460 | From: CA | Registered: Jun 2002
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wheelsonly
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Member # 10220
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posted
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..
![-](http://img.photobucket.com/albums/v236/xr8ted/Mobile%20Uploads/208A6CD9-4C81-4CB1-B60A-5144F50C7591_zpsuflwujle.jpg) ![-](http://img.photobucket.com/albums/v236/xr8ted/Mobile%20Uploads/0FDAD3EA-94ED-499B-BC55-A76D01A755D6_zpsnly3xjld.jpg)
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.. ![-](http://img.photobucket.com/albums/v236/xr8ted/Mobile%20Uploads/BC632558-479E-4D3C-A7B0-7E330A4C2DF1_zpsjied26jh.jpg) ![-](http://img.photobucket.com/albums/v236/xr8ted/IMG_2979_zps3741eafe.jpg)
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.. ![-](http://img.photobucket.com/albums/v236/xr8ted/Mobile%20Uploads/56494209-B376-41F1-89EE-88A7884E52E3_zpsc0iv5t0q.jpg) ![-](http://img.photobucket.com/albums/v236/xr8ted/Mobile%20Uploads/8C48A977-C8B0-4597-B4C9-E2A2A703CBDC_zpsu730i498.jpg)
Here is some before and after of these stock 243 castings with some before and after numbers.. ![-](http://img.photobucket.com/albums/v236/xr8ted/Mobile%20Uploads/6C327C06-2BDF-4D58-837A-073912BE304A_zpscdmkqv1z.jpg) [ 2014-05-11, 06:23 PM: Message edited by: wheelsonly ]
Posts: 59 | Registered: Aug 2010
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