1997 SSEi Performance Build up Time Update 2/5/07new mod!! - Page 11 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 12-11-2006, 10:00 PM   #101
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Sorry, I have them mixed up. Both my manifolds on my cars are tubular. It'* your front that'* a problem. Can you take a pic of a front manifold port straight on? So everyone can see what we're talking about?
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Old 12-11-2006, 10:01 PM   #102
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Matt, the Machine Shop will want both manifolds in hand to get them matched right. The process involves welding to build up material under the chin, then milling it out to match the ports on the other manifold.
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Old 12-11-2006, 10:06 PM   #103
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I looked at Haros Pics from his Manifolds, and i will make sure to show the place in town I want to do mine.
Note:
My camera is all fucked up now for some reason, it wont take a good pic of anything..
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Old 12-11-2006, 10:08 PM   #104
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Quote:
Originally Posted by SSEimatt93
I looked at Haros Pics from his Manifolds, and i will make sure to show the place in town I want to do mine.
Note:
My camera is all f*** up now for some reason, it wont take a good pic of anything..
good plan

macro on?
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Old 12-11-2006, 10:23 PM   #105
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Old 12-11-2006, 10:24 PM   #106
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If they're off the car, and you want 'em matched, now'* the time to actually match them.
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Old 12-11-2006, 11:25 PM   #107
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Old 12-12-2006, 12:28 AM   #108
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Typically a ruler is the first step.

Most common PEM'* provided by the major vendors are carefully crafted and matched per the comments in this topic. After the ruler. The idea is to have all 6 ports flow equally. Or am I misunderstanding your question?
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Old 12-12-2006, 12:56 AM   #109
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Im sure most of these performance shops, like the one im using, can bench flow test these too, this is important.
I got the rear manifold off tonight
Im not to worried about those now, they can be the last item to go on the car in January or Febuary for all I care, I also noticed the stock manis on my 97 had thin steel gaskets, almost like shims, say about .15 to .20" thick, doubled up on both sides..my 93 was manifold to head, as are all STOCK Series 1s..intresting..
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Old 12-12-2006, 07:29 AM   #110
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Quote:
Originally Posted by willwren
I remember now. Your rear PEM didn't get any material added under the 'chin'. Your front will outflow the rear dramatically..
Beer is to be consumed AFTER posting from now on.

As Matt says, the manifold pictured with his old one is the front. On the S2 motor the rear manifold is actually in good shape to flow. The front...pictured by Matt is the restriction.

My suggestions on that front manifold is to have material added underneath and have the ports machined round and cleaned up while they are in there opening them up more.

This picture should show the material added under the chin as Bill was calling it.
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