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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Less rear camber for more straight line traction



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      06-16-2017, 04:20 PM   #1
YoungBlood
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Less rear camber for more straight line traction

Will less rear camber, give me any gain in straight line traction? I'm running 2.3* right now, would running something more like 1.5* give me a significant increase in straight line traction? How much would cornering grip suffer? I know these are subjective questions, but looking for some experiences
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      06-16-2017, 04:58 PM   #2
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Quote:
Originally Posted by YoungBlood View Post
Will less rear camber, give me any gain in straight line traction? I'm running 2.3* right now, would running something more like 1.5* give me a significant increase in straight line traction? How much would cornering grip suffer? I know these are subjective questions, but looking for some experiences
Review tire wear... I am at -1.7* and I would probably be better off with -1.3* or so. Tires come off road-courses still wearing above the wear indicator. Straight line traction will definitely be improved by reducing camber from -2.3 to -1.5.

This question is completely dependent on tire construction and suspension setup though. Some tires work better at higher slip angles and more negative camber. Others want to be flatter at all times to produce maximum grip. A softer rear suspension may may produce more rear roll and therefore a greater need for rear camber. Again, review tire wear...
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      06-17-2017, 10:04 AM   #3
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I only have 2K miles on my current tires, last set wore mildly more inside than out, and that was with a bit less camber than I have now, so I feel that pulling .8* would help
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      06-17-2017, 10:51 AM   #4
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Quote:
Originally Posted by YoungBlood View Post
I only have 2K miles on my current tires, last set wore mildly more inside than out, and that was with a bit less camber than I have now, so I feel that pulling .8* would help
I think more importantly would be to review how far over the sidewall the tire pushes... there is a little triangle that points to the ideal spot.

After some hard cornering review how far above/below the triangle your wear is. Too far above the triangle? Then you're not using all your tread and you'll probably benefit from less camber...

Inside wearing faster than outside will always happen with camber on a daily driver because you probably spend more time driving in a straight line than cornering at 1.3 g's lol.
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Last edited by bbnks2; 06-17-2017 at 10:57 AM.
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      06-18-2017, 05:39 AM   #5
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You'll need to look at toe as well, as you accelerate, especially from launch the rear squats, changing camber and toe. I don't know drag racing well but I'm sure people have worked out roughly what settings you want for it.
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