Ported Exhaust Manifolds - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


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Old 11-30-2005, 11:35 AM   #11
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Originally Posted by willwren
We don't use salt out here, so I don't know if a rust comparison between us is fair, but I don't see how they could. They're stainless to begin with (which does rust, just very slowly), and coated now, too.

Just don't wrap 'em.
Ayep. That wrapping looks like a joke.

I've seen these things collect alot of rust. That was another minor concern of mine.
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Old 11-30-2005, 11:43 AM   #12
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Junkyard cross reference told me the front manifold was the same in 95 NA or SC. That applied to the front and I happen to grab that off a 94 SC with the rad, fans and airbox already pulled out. Why work when you can benefit from someone else doing most of it?
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Old 11-30-2005, 01:01 PM   #13
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There are no reputable vendors for it. It'* a DIY project. If you don't tackle it yourself, you need to find a local welder/machine shop to do the work for you.

It'* not really difficult, but more of an 'attention to detail' kind of job. The welding technique is the most critcal so the flanges don't warp.
Hmmm....there are numerous vendors that port exhaust manifolds....Hulkspeed is one...ZZP offers ported manifolds....WBody store does as well....I would call those reputable...
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Old 11-30-2005, 01:03 PM   #14
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Quote:
Originally Posted by willwren
There are no reputable vendors for it. It'* a DIY project. If you don't tackle it yourself, you need to find a local welder/machine shop to do the work for you.

It'* not really difficult, but more of an 'attention to detail' kind of job. The welding technique is the most critcal so the flanges don't warp.
Hmmm....there are numerous vendors that port exhaust manifolds....Hulkspeed is one...ZZP offers ported manifolds....WBody store does as well....I would call those reputable...
Theyll do Series 1?
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Old 11-30-2005, 01:13 PM   #15
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Quote:
Originally Posted by willwren
There are no reputable vendors for it. It'* a DIY project. If you don't tackle it yourself, you need to find a local welder/machine shop to do the work for you.

It'* not really difficult, but more of an 'attention to detail' kind of job. The welding technique is the most critcal so the flanges don't warp.
Hmmm....there are numerous vendors that port exhaust manifolds....Hulkspeed is one...ZZP offers ported manifolds....WBody store does as well....I would call those reputable...
They ..........are not ...........for the .......series 2.......................
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Old 11-30-2005, 01:17 PM   #16
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Originally Posted by hvactech
Quote:
Originally Posted by willwren
There are no reputable vendors for it. It'* a DIY project. If you don't tackle it yourself, you need to find a local welder/machine shop to do the work for you.

It'* not really difficult, but more of an 'attention to detail' kind of job. The welding technique is the most critcal so the flanges don't warp.
Hmmm....there are numerous vendors that port exhaust manifolds....Hulkspeed is one...ZZP offers ported manifolds....WBody store does as well....I would call those reputable...
They ..........are not ...........for the .......series 2.......................
Oops.....
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Old 11-30-2005, 01:42 PM   #17
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They ..........are not ...........for the .......series 2.......................
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Old 11-30-2005, 02:59 PM   #18
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Originally Posted by BillBoost37
Junkyard cross reference told me the front manifold was the same in 95 NA or SC. That applied to the front and I happen to grab that off a 94 SC with the rad, fans and airbox already pulled out. Why work when you can benefit from someone else doing most of it?
Wrongo, bucko. That would be a NEAT trick. L36 manifolds WILL NOT work on a Series 1 L67. Port sequence is totally off.

Junkyard locators are notoriously mistaken with regards to drivetrain changes over the years within a single body (H).
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Old 11-30-2005, 03:16 PM   #19
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Originally Posted by BillBoost37
Junkyard cross reference told me the front manifold was the same in 95 NA or SC. That applied to the front and I happen to grab that off a 94 SC with the rad, fans and airbox already pulled out. Why work when you can benefit from someone else doing most of it?
Wrongo, bucko. That would be a NEAT trick. L36 manifolds WILL NOT work on a Series 1 L67. Port sequence is totally off.

Junkyard locators are notoriously mistaken with regards to drivetrain changes over the years within a single body (H).
What do you want me to tell you? Port that!
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Old 11-30-2005, 03:22 PM   #20
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BTW, porting with a dremel is out of the question.

That would take YEARS. I finished with a dremel, but only for final polishing. Even with a die-grinder, it took me a long damn time.
Hmmm.... we used a pneumatic rotary tool with a good cutting "tree" bit to do my rear manifolds without a problem. His manifolds should be the same as my rear one, right? If so, he should be able to do it.
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