I was driving 8% uphill in a tunnel at about 80 km/h. Temperature in tunnel about 15 degrees celsius. Quite a surprise that the exhaust is glowing redhot as I was far from pushing the throttle. Have added a pickture as a file (if I succeded).
Pix came through. No surprise at all. This is the reason that nice stainless finish will eventually turn black. This is also a good reason to tape the exhaust with a fiber glass tape. When you come to stop after a hard run the heat from the pipes will try to soften/melt the turn signal indicators!
What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
I guess you have stock pipes ? They are very restrictive and cause excessive back pressure which in turn causes them to heat up. Lord knows what it is doing to the engine. Either drill out the baffles as some have done on here or fit a less restrictive pipe , available from Morgan , G56 .
I would also imagine that the ECM has the system running VERY lean. The M3W has to meet emission standards.
Here in Missouri there are no emission sniffers at inspection time. In some states cycles don't even get inspected.
If possible due to your home location, a reprogram of the ECM would be a big help with glowing pipes and performance.
In the UK the M3W is exempt from emission testing, as I found after taking mine for its MOT and it really struggling to pass a test that it should not have been put through in the first place.
From talking to people who have run them on the dyno, they actually run quite rich as the mapping tries to compensate for the excess heat. Counter-intuitive perhaps, but the standard mapping seems to match less restrictive exhausts better than the standard pipes.
