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  #1  
Old 11-27-2008, 11:24 AM
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Ported stock headers
I spent last night porting and polishing out my stock exhaust manifolds... Here are some pics from it. The openings were originally about 1 1/2 inches in diameter and now they are a hair wider than 1 3/4 inches.....








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  #2  
Old 11-27-2008, 11:49 AM
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Re: Ported stock headers
Looks good. Aughta help a little bit. Are you doing any more work? I like seeing porting work. I recently worked on one of my turbo housings, port matching it to my aftermarket manifold. Took quite a bit of material out.
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  #3  
Old 11-27-2008, 12:00 PM
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Re: Ported stock headers
The Rust hurts my eyes
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  #4  
Old 11-27-2008, 06:20 PM
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Re: Ported stock headers
They are now all smooth and black.... No more rust..... That is all I have planned for the headers but, the rest of the exhaust will be altered very slightly as well.....
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  #5  
Old 11-28-2008, 09:50 AM
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Re: Ported stock headers
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Originally Posted by sicksubie View Post
They are now all smooth and black.... No more rust..... That is all I have planned for the headers but, the rest of the exhaust will be altered very slightly as well.....
What are the measurements of the exhaust port on the heads?
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  #6  
Old 11-29-2008, 09:17 AM
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Re: Ported stock headers
What did you use to port them with?
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  #7  
Old 11-29-2008, 05:06 PM
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Re: Ported stock headers
Dremel and an ipod.....
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  #8  
Old 11-29-2008, 08:54 PM
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Re: Ported stock headers
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Originally Posted by sicksubie View Post
Dremel and an ipod.....

just like i said in the other thread.


are you as a "3rd party SVX owner" now going to report a 15hp gain?
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  #9  
Old 11-29-2008, 10:03 PM
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Re: Ported stock headers
I already have before numbers. It is just a matter of going back to the dyno....
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  #10  
Old 12-18-2008, 08:13 AM
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Re: Ported stock headers
Quote:
Originally Posted by Phast SVX View Post
What are the measurements of the exhaust port on the heads?
2nd this............

Alsok looks like a nice job.
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  #11  
Old 12-18-2008, 08:47 AM
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Re: Ported stock headers
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Originally Posted by Phast SVX View Post
What are the measurements of the exhaust port on the heads?
1.5" for a stock port.... Bobby, what is the point of just modifying the ports on the manifolds if you are not able to get all the way down and out. That and w/o supporting headwork, you exhaust gases move quickly to a large open space... Slow down... tumble... and try to find an exit... You want them to go faster and pull out other gases w/ their intertia

Tom
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  #12  
Old 12-18-2008, 10:00 AM
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Re: Ported stock headers
I was able to get all the way down except for the furthest back corner on each front runner... I want to see what this does.. If nothing then it was a couple hours and zero dollars spent...
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  #13  
Old 12-18-2008, 10:49 AM
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Re: Ported stock headers
Though it may not be a big deal in this case, but usually in the performance world, it is best to have a slightly smaller exhaust port dumping into a larger header runner, or having a conical shaping to the ex port to help reduce the risk of exhaust gas reversion. Though it would best if the runners within the header maintain the same diameter.
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