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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Front sway bar only?



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      09-05-2008, 10:48 AM   #1
335timb
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Front sway bar only?

Back in my Suabru days, dealing with the nose-heavy AWD system, it was found that it larger front sway bar ALONE had a drastic improvement in overall grip. Now, I know that common convention holds that a larger front sway will worsen understeer, but, if a larger front sway and negative front camber could maintain front end grip, reduce overall body roll, and NOT allow the inside rear wheel to lift, wouldn't that work? Does anyone here have experience with use of a FSB only?
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      09-09-2008, 12:31 AM   #2
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Quote:
Originally Posted by 335timb View Post
Back in my Suabru days, dealing with the nose-heavy AWD system, it was found that it larger front sway bar ALONE had a drastic improvement in overall grip. Now, I know that common convention holds that a larger front sway will worsen understeer, but, if a larger front sway and negative front camber could maintain front end grip, reduce overall body roll, and NOT allow the inside rear wheel to lift, wouldn't that work? Does anyone here have experience with use of a FSB only?
It really depend on the suspension you are running.

On our project 335i with TC Kline coil-overs, we were able to dial out most of the understeer with the addition of a front anti-roll bar.

It did just like you said, body roll is reduced, thus reduce unwanted camber change. Results were shown on tire temperatures measured across the tread surface. No longer we need more than 3+ degree of negative camber or add more spring rates in the rear.

Harold
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