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      08-03-2012, 12:56 PM   #30
m3an
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Drives: M3
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Quote:
Originally Posted by m3alabama View Post
"why does bmw make the car with launch control then.."

Well hitting 8400 rpm going 13 miles per hour is not something that could or would ever happen in launch control, or any launch even if you held the revs high and let her rip. This occurs if you are purposely doing a prolonged burnout and even than you should not be hitting 8400 rpms.

The OP did not comment as I suspect he was doing burn outs. There is clear evidence of that and sustained burn outs on a diff is considered abuse.

I am not saying its great and it is really bad luck they denied the claim, but I can't say this is not "fair" and in line with abuse of a part of the car with subsequent damage. A sustained burnout at full throttle is putting tremendous stress on the diff, much more than a simple hard launch even when using launch control.

the lateral forces to the diff bolts are much greater when moving than standing still. The launcing (if hooking up) is where things will break. A good (proper) smoky burnout shouldn't hurt anyhting. (noticed I said proper)
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