Test Pipes smell HORRIBLE..and other matters
08-19-2003, 06:59 PM
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Test Pipes smell HORRIBLE..and other matters
I just put on my test pipes earlier to check them out today..using them for track use...BUT, the car smells HORRIBLE with them on. I feel nautious (sp) everytime I stop and the smell of gas wafts up into the passenger cabin. Does the computer adjust and run leaner to compensate once you drive for a hundred miles or so? Or does the smell continue? Also I have the borla TD exhaust and there is a hissing sound that sounds like an exhaust leak around 2000-3000 RPM, when you let the revs go down, when you rev UP the car there is a hissing sound around 4000 RPM...Anyone else get this??
Otherwise, the sound is crazy, and there is a significant gain in power
Otherwise, the sound is crazy, and there is a significant gain in power
08-19-2003, 07:18 PM
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Unless you've got an exhaust leak, that's the sound of air flow...whenever you replace your cat pipes with test pipes, you're going to hear the air flow sounds...there's always a trade-off to power...I haven't replaced the pipes on mine yet...but on my Cobra, when I changed to an off-road H-pipe design, I quite a bit of air-flow sound compared to cat-pipes & sitting in the drive-thru or bank teller....the smell would almost knock me out....it just the price you pay for getting rid or the cats....now you know why the "tree-huggers" get so angry about regulating exhaust gasses...you gotta love it or hate it...I hate to tell ya
08-19-2003, 10:37 PM
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The smell never goes away because the material that absorbed it is gone and it stinks especially if you are in a confined garage, plus you get drone too. I hated that smell!
These are the 2 reasons (plus fear of heavy fines) that I put them back on my Z28.
These are the 2 reasons (plus fear of heavy fines) that I put them back on my Z28.
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08-20-2003, 05:41 AM
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I've had my test pipes on for 2000 miles and i have never noticed a smell even when running 3 gallons of toluene or xylene in my tank. what kind of gas are you using?
08-20-2003, 06:57 AM
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I have never noticed a smell with mine on either...the only thing that is different is the sound and a rattling or vibration sound at 3500rpm or higher. My understanding is that it's normal because the cats actually act like a resonator and without them the exhaust gasses flow better out of the headers, which are hitting the stainless test pipes making the noise.
08-20-2003, 08:21 AM
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The smell is temporary and the noise of the TD Borla is normal, its because of the H pipe, you have more flow now. the sound is there w the cats too but is very quiet.
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