home porting throttle body
Thread Starter
Teching In
Joined: Jul 2004
Posts: 23
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home porting throttle body Does anyone have a link on how to do this, or know how to do it? I searched and found nothing about it. I want to do it because I am also port matching my intake to my heads and I wanted to do this to.
TECH Fanatic
Joined: Jan 2005
Posts: 1,162
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From: St. Augustine, FL
you're talking about porting the intake manifold, not the throttle body. I worked on just my stock throttle body one night a few weeks ago. Made my own air foil and smoothed out the ridges in front and behind the blades. I stayed about 1/8" away from the blades on each side. I didn't touch the intake manifold at all though. I dont think I gained anything noticable from it. Here's some pictures.
I think I read somewhere that the stock manifold will support up to 52mm without porting but, when you goto something like the 58mm you will need to. Just use the gasket that comes with to draw in the outline and then dremel it to the right size. With the TB, I had the best luck with the sanding disks vs. the metal grinding/shaving tool. The metal burr tool tended to 'grab' and hop around alot where the sanding disks were easier to control and made a smoother surface. After I got the ridges eliminated in front and behind the blades I smoothed it all out with various fine grit sand paper for a very smooth finish. Here's a link to Brent Frankers website explaining how to home port your intake manifold for a 58mm TB.
Installing Holley 58mm TB & porting intake while still on the car
Hope all this helps.
I think I read somewhere that the stock manifold will support up to 52mm without porting but, when you goto something like the 58mm you will need to. Just use the gasket that comes with to draw in the outline and then dremel it to the right size. With the TB, I had the best luck with the sanding disks vs. the metal grinding/shaving tool. The metal burr tool tended to 'grab' and hop around alot where the sanding disks were easier to control and made a smoother surface. After I got the ridges eliminated in front and behind the blades I smoothed it all out with various fine grit sand paper for a very smooth finish. Here's a link to Brent Frankers website explaining how to home port your intake manifold for a 58mm TB.
Installing Holley 58mm TB & porting intake while still on the car
Hope all this helps.
