Porting intake pictures.
Thread Starter
Race Director
Joined: Jun 2004
Posts: 13,962
Likes: 707
From: WI
Porting intake pictures.
I've been working on my Big Mouth intake. Here's a picture cleaning up the casting ridges in the intake base. Once I was done I used steel wool to make it very smooth.
A picture polishing the plenum. I used a brass brush bit in my drill. I chose to make it more of a satin finish then smooth and mirror like. If you use the brush in a die grinder it will smooth the metal down quickly.
Next is a picture porting the plenum. I removed all the square metal walls. They were just inside the TB openings and between each pair of runner openings. Now if you look down through the plenum it is a straight shot for the air.
A picture while port matching the AS&M runners to the plenum. I shined a work light down the runner. It looks like afterburners!
I will post dyno and track results once I am finished! There are a few more pictures in the My Corvette photos link to the left of this text by my name.
A picture polishing the plenum. I used a brass brush bit in my drill. I chose to make it more of a satin finish then smooth and mirror like. If you use the brush in a die grinder it will smooth the metal down quickly.
Next is a picture porting the plenum. I removed all the square metal walls. They were just inside the TB openings and between each pair of runner openings. Now if you look down through the plenum it is a straight shot for the air.
A picture while port matching the AS&M runners to the plenum. I shined a work light down the runner. It looks like afterburners!
I will post dyno and track results once I am finished! There are a few more pictures in the My Corvette photos link to the left of this text by my name.
Last edited by Aardwolf; Apr 4, 2006 at 11:33 AM.
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
THis guy does some beautiful home porting, cant wait to see how his base comes out. 
http://forums.corvetteforum.com/show...ng&forum_id=48
http://forums.corvetteforum.com/show...ng&forum_id=48
Thread Starter
Race Director
Joined: Jun 2004
Posts: 13,962
Likes: 707
From: WI
What did you use to continue down through the base? Mine narrows and flows into a D shape. My bits have a tough time fitting in the corners in the middle. I thought of trying a smaller dia. sanding drum but it's also tough to get the angle so that the extension doesn't rub around the runner opening/gasket area. I didn't try to port or change the shape, just clean up the casting mess and then polish. It looked like if I wanted to port I'd have to pay close attention to the shape, how the air changes from the circle to D shape. To make the exit into the head smooth and not turn the air sharply.
Race Director
Joined: May 2003
Posts: 10,749
Likes: 41
Originally Posted by Aardwolf
I've been working on my Big Mouth intake. Here's a picture cleaning up the casting ridges in the intake base. Once I was done I used steel wool to make it very smooth.
A picture polishing the plenum. I used a brass brush bit in my drill. I chose to make it more of a satin finish then smooth and mirror like. If you use the brush in a die grinder it will smooth the metal down quickly.
Next is a picture porting the plenum. I removed all the square metal walls. They were just inside the TB openings and between each pair of runner openings. Now if you look down through the plenum it is a straight shot for the air.
A picture while port matching the AS&M runners to the plenum. I shined a work light down the runner. It looks like afterburners!
I will post dyno and track results once I am finished! There are a few more pictures in the My Corvette photos link to the left of this text by my name.
A picture polishing the plenum. I used a brass brush bit in my drill. I chose to make it more of a satin finish then smooth and mirror like. If you use the brush in a die grinder it will smooth the metal down quickly.
Next is a picture porting the plenum. I removed all the square metal walls. They were just inside the TB openings and between each pair of runner openings. Now if you look down through the plenum it is a straight shot for the air.
A picture while port matching the AS&M runners to the plenum. I shined a work light down the runner. It looks like afterburners!
I will post dyno and track results once I am finished! There are a few more pictures in the My Corvette photos link to the left of this text by my name.
let us know when u get those dyno #'s.
Safety Car
Joined: May 2006
Posts: 4,290
Likes: 140
From: Salem NH
Originally Posted by fredk
The import boys are cutting the top off the manifold, porting it and then welding it back together to get inside a lot easier. Just a thought.
Fred
Fred
-- Joe
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Race Director
Joined: May 2003
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Originally Posted by fredk
The import boys are cutting the top off the manifold, porting it and then welding it back together to get inside a lot easier. Just a thought.
Fred
Fred
i have a friend that did that with the tpi. he hasnt tested it yet.