Quote:
Originally Posted by ard
Here is a question:
What is the design limit on rotational mismatch, front to rear and side to side?
Lets say your rears are 0.2" larger, so they are turning at (say) 700 revs per mile, and the fronts at 715 revs/mile.
So at 60 mph that is 15x60/60 = 15 revs per minute. So the differential (front to rear) is 'compensating' for a mismatch at 15 revs per minute, or one rev every 4 seconds.
(Anyone want to check, just measure the distance from the ground to the central point of the roundel- difference is the rotational radius (without dynamic effects))
Anyone know? My guess is that BMW doesnt publish this....
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BMW did publish this in one of the the training manuals (likely for the chassis dynamics/undercar technology classes) If I had my books at the house still I'd scan the page and post it, but I loaned all my training manuals to my brother when he started working with me so he could read up. Come to think of it, I may have even posted that info up here sometime in the past, but that would be a hard dig. I wish I could access the online training manuals from home... but that would make life easier.