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Old 06-11-2008, 10:19 AM   #1
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Originally Posted by j.fro
My headers do have the second set of 02 bungs, but from what I understand, the purpose of the second set of sensors is to detect catalytic converter efficiency. Being in the exhaust flow but without the cats, they measure that the exhaust gases are the same as the first set and send an error code that the cats aren't working. I'll be installing them this evening to see if the result is different.

"I have not failed. I have discovered 1000 ways that don't work". T. Edison
i have eliminate all 4 of my cats...

headers with all 4 o2 sensor plugged in and straight pipe and borla exhaust
no CEL, one thing I do not like is that it's too annoying loud...
sound like a muscle car

so I'm going to put the secondary cat back to see how it sounds like...

Jeffrey, how does your exhaust sound like with headers and bored out secondary cat??
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Old 06-11-2008, 04:24 PM   #2
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I can't wait to get my modified header so I can play with my O2 sensors like you guys.

I think I'll just plug my sensors in and see what happens. I know J.fro said he tied his up to prevent a CEL but without them sensing something they will throw a light, no doubt. I like the washer thing as long as part of the sensing ports on the O2 sensor is out of the exhaust stream. Time will tell after I have them installed and I get a CEL.
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Old 06-12-2008, 10:33 AM   #3
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You guys still havent answered the question how headers compare with the overall performance/sound compared to desnorkling...
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Old 06-12-2008, 04:41 PM   #4
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Desnorkling= swimming in a pool
Headers= swimming in the ocean

How's that for an analogy?
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Old 06-12-2008, 09:54 PM   #5
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Cel

Car threw a CEL after 250 mile ocean swim. No worries. I'll just delete it w/ the Durametric software.
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Old 06-13-2008, 05:15 AM   #6
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j.fro wow didnt think it was that big of a difference lol. I mean i felt a pretty nice bump after densorkle but might have to try headers if its swimming in a ocean!
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Old 06-13-2008, 08:55 AM   #7
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Remember guys, the engine is a big air pump and the more efficiently you can draw the air in and blow it out the more power you'll make.

That’s why opening up (desnorkeling) the air intake, installing a low restrictive air filter, adding a turbocharger, supercharging are great ways to increase the intake volume. The same can be said about headers, there're less restrictive than stock and that compliments the scavenging of the cylinder to make way for the next charge. But not as much as to burn valves by not providing the proper back pressure.

Nitrous Oxide, now that's a different animal and doesn’t follow this line of thinking.
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Last edited by Jaxonalden; 06-13-2008 at 09:01 AM.
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