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      08-07-2011, 02:21 PM   #13
HP Autosport
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Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com

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Quote:
Originally Posted by MDORPHN View Post
Just back from first day on track with my 1M.

Took it easy first session learning the car, but began pushing second session.

Coming onto the bridge straight (at Summit Point's Shenandoah Circuit), "pop." Reduced power and check engine light.

Immediately suspected the charge pipe, and -- after getting back into paddock -- I checked. Sure enough, charge pipe had come off throttle body.

10 minutes later, it is back together (with the circlip loudly snapping into place). Go back out next session, and in exact same place, "pop" (again). Same deal. Was able to repair it in 5 minutes this time.

I'm aware of several other 1Ms that have had this problem and figure that this will be (or is) a common problem with 1Ms that are tracked.

Perhaps the overboost feature and the stresses of track use puts a marginal design over the edge.


Neil
Evolution Racewerks makes a nice CNC machined alum. charge pipe that is a lot more secure. It also has the optional meth bungs if you ever decide to add meth inj. to your car.
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