Emissions Code with Hi-flows??
Thread Starter
Racer
Joined: Jun 2004
Posts: 252
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From: Brevard NC
Emissions Code with Hi-flows??
How many people got a Check engine light after installing Headers and hi-Flow cats. I knew the removal of Cats would cause one, but I had no trouble with my other 05 C6, but on this 07, immediate Emissions Code. Reset battery and came back again.
Safety Car
Joined: Dec 2004
Posts: 3,565
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From: stafford country, va. Avatar: Me on turn 3 @ Bristol (The World's Fastest Half-Mile)
Kooks LT headers (jet-hotted), high-flow cats, x-pipe, b&b bullets, no tune, and no codes. headers have been on for over 2k miles without any issues.
however, it does seem to be 'common' to get codes after header install, or at least we hear about it more than not.
however, it does seem to be 'common' to get codes after header install, or at least we hear about it more than not.
Race Director
Joined: Oct 2004
Posts: 10,089
Likes: 13
Also, relocating the cats further from the engine impairs their ability to light off quickly, which is tested for at start up in modern emission control systems. This second problem can be addressed by coating the long tube headers so they retain more heat in the gases back to the cats.
Coating the headers has another benefit. The speed of sound, and hence the speed of pressure wave flow, in a pipe is directly proportional to the temperature of the gas flowing in the pipe. Retaining more heat in the gas will thus increase flow, potentially giving you more performance. Coating also decreases underhood temperatures, with obvious performance benefits.
