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tj930 tj930 is offline
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Join Date: Jun 2008
Location: England
Posts: 301
Originally Posted by derekuk930owner View Post
additionally , doesnt having the pipe improve performance in some way?
Derek, what year is your car?

Mine passes fine without the air-injection system.

You can adjust the CO mixture with an Allen key, so that your Air-Fuel Ratio is about 14.0 (0.95Lambda) at tickover.. Your car may not run all that well (it'd prefer the mixture to be a little bit richer, at 13.5AFR or something) but it'd certainly passes the emmisions test. But, as I say, I've never had a problem. (Supposedly removing the air pump liberates another 3->5bhp.)

But the best place for header removal information (and a whole lot else besides) is Wayne Dempsey's 101 Projects book. (I'm assuming that you've heard of him, since he owns this web site! )
Old 07-21-2010, 06:20 AM
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