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Old 08-10-2007, 01:12 AM   #1
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You could install these electric ones.....

http://www.badlanzhpe.com/index.html

.....and then get a cheap shift light circuit from ebay, hack it and use the ouput of that to drive a relay circuit (rather than lighting the shift light) and you could have a configurable exhaust valve.

If you could have the valves opening into bypass pipes then I think you could be on to a winner. I am not 100% on the sound but like the idea.
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Old 08-11-2007, 06:39 AM   #2
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That could be one way of doing this, though I am thinking of a more progressive opening, over say, a 1000 RPM from beginning to open to fully open, rather than just a hard RPM point from open/close.

There needs to be a bit more engineering put into this, perhaps it will become a winter project.

Patrick
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Old 08-14-2007, 04:24 AM   #3
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Just put my order through for a set of Maxspeed headers. Will dyno it afterwards to see how they perform on my 3.2.

Baseline was 168rwkw on a very hot day.

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Old 08-15-2007, 03:34 PM   #4
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good choice!!!
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Old 08-15-2007, 06:34 PM   #5
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Hey Panameras-

Please update us on the results from a HP gain and sound/feel perspective. I talked to my local pcar mechanic and his basic answer to me was, "WHY?". You're not going to gain much HP and going to be throwing CEL codes all over the place. Our situations are different because of the integrated cat in my headers. I think I'd be much more likely to do it if we had the Euro headers here with only 2 cats.

Good luck and hope you like them.

__________________
Jeff Wilson

1989 911 Cabriolet
Grand Prix White/Black
33k

Stock except:
Turbo 7x9 Fuchs


SOLD!
2002 986S
Seal Gray/Black
Painted Center Console
18" Turbo Twists with rear spacers
Tequipment aluminum shift knob
Colored center caps
De-ambered tail lights/side markers

Stock except:
B&B catback exhaust

http://i29.tinypic.com/i6crck.jpg
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Old 08-16-2007, 06:30 AM   #6
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Unfortunately, if you want headers on US Spec cars, I think the only real choices are Cargraphic and FabSpeed as they have high flow cats in the headers. Pricey, very pricey however. I do think there are power gains to be had though, considering the dismal design of the factory headers on this car.

Patrick
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