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you guys are amazing..... (archive)

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Posted by M Sipe on August 02, 2000 at 16:50:07:

In Reply to: Mark & Chris - suspension question posted by Mike Zamarocy on August 01, 2000 at 03:32:53:

you try to over-theorize and over-analyze everything. For the record my car lifts the inside front wheel like there's no tomorrow and if you're hooked up and running right yours will too. Lifting the front wheel does not generally induce understeer and it's more a result in the difference in available wheel travel between the front and rear suspension. The rear suspension has almost twice the travel as the front suspension; this is true for most late model BMW's. The front wheel lifts once the inside front strut extends to the max and the car continues to squat back onto the outside rear wheel. The more balanced and hooked up you are exiting the corner, coupled with increasing sharpness of the corner, the more you'll carry the inside front wheel. When you understeer the grip of the outside front tire is too low to allow the inside front wheel to lift. When the outside front is hooked up and the outside rear is squatting and rotating through the corner exit is when the inside front lifts. If you look at old German Touring car championship series stuff back from the 70's when racing cars had lots of suspension travel you'll see the factory BMW's carrying inside front wheels all the way thru the sweepers at tracks like Nurburgring.

As for Mike's original question, your roll angle does not appear to be excessive for the long, sweeping cornering condition on stock springs/swaybars. Note that you're not leaning any more than the car behind you. The best way to find an answer to your question is to just try it. Put the front shocks on max and the front bar on full stiff and see what happens. You may have to alter other things to find the optimum setup, or you may just decide that it's not ever going to be optimum. The more combinations you try the greater your understanding becomes on how to set it up for the conditions encountered.


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