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Old 04-13-2004, 03:03 AM   #1
Flip C
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Default No emmissions test, what 2 do?

So lucky for us in Alabama that our state dosen,t have any emmissions checks. So with that in mind...
I'm going to go ahead and upgrade my exhuast system on my 2K 2.5RS. Everything. What do ya'll think would be the best combo for power?
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Old 04-13-2004, 06:49 AM   #2
Defiantguy
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some type of track pipe setup.
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Old 04-13-2004, 09:51 AM   #3
Nicklbrso
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yeh a Stromung track pipe, eliminating the cats would be a good idea.
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Old 04-13-2004, 03:49 PM   #4
Defiantguy
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ya no more CEL issues, just get the PEP CEL eliminator.
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Old 04-13-2004, 11:48 PM   #5
RS_to_WRX_swap
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get a track pipe if you hate the earth.





maybe get a high flow cat.
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Old 04-13-2004, 11:50 PM   #6
ttboy19
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Go with the high-flow cat. Being catless stinks. And you're killing mother earth.
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Old 04-14-2004, 06:45 AM   #7
Defiantguy
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screw mother earth.
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Old 04-14-2004, 10:08 AM   #8
Opie
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Actually going cat-less will reduce HP compared to running a stock or High-flow cat on a computer controlled car. Few reasons why; not enough back pressure, ECU "correcting fuel and air mixtures to try and compensate, etc.

I did a year of testing on this subject back in 1996 for the comapny I worked for; Gordon-Darby. We had consistent dyno test results that computer-controlled cars saw a reduction in their HP readings and mileage after removing the cat compared to the stock cat. We also tested a few high-flow cats at the time and saw that those, depending on brand/style, provided minimal HP gains yet still reduced mileage all with acceptable emission levels. Without re-programming a car's ECU to compensate for the removal of a cat, those that are claiming gains from doing this are making these claims via "butt-dyno" testing, not and repeatable or consistent testing method such as a dyno.
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Old 04-14-2004, 11:15 AM   #9
Machine Age Victim
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Old 04-15-2004, 02:34 AM   #10
Flip C
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OK,
Personnally I never was considering removing my CAT.
Even though they don't run emmissions test that is still illegal here.
I was just asking the age old question Borla Vs Cobb Vs Apexi vs who ever else. This piece with that piece.
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