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      08-10-2008, 10:35 PM   #41
d3syd
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Drives: 135i MT, LMB, ProNav
Join Date: Nov 2007
Location: Scamander, Tasmania

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2008 135i Coupe  [0.00]
Quote:
Originally Posted by TP 135i View Post
The valve doesn't open with temperature, it opens with rpm. Even with the engine up to operating temp the valve is closed until you get over 3000 ish rpm.
No I don't think that is the case. When I first start up, there is definitely only one pipe working, after a short time, while still idling, the valve opens and both pipes emit exhaust gas. So it is not rpm driven on my car at least. Can you check if this is the case with your car?

If what you are saying is correct, then whenever rpm drops below 3000, only one pipe is working. No so.:iono:
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