- Sep 19, 2018
Thank you for that information regarding the suspension, very good read. I have a question. So if one changes the stock Non-M suspension. They should no longer use stock alignment specs? I ask as I have done a few things to the suspension and keep burning through rear tires. I have Eibach Springs, Bilstein shocks, Front M3 arms, aftermarket rear camber arms and Toe arms ( a friend gave them to me) and Rear Subframe Inserts. I recently noticed the Rear toe arms I had were crap and had a bunch of play( but this was one of the best upgrades to the suspension to me as in stability wise). So i ordered Some Meagan arms as they have good reviews and not much complaint about noise like with some of the higher end Toe arms. But now i wonder if maybe I just have to use different alignment specs?
Some info hereGotcha... @Silver_Sur4r_N54 was looking for alignment specs because he said he kept wearing out rear tires.
@Silver_Sur4r_N54 is it street driving that is wearing out the rear tires? How is the wear... across the whole tread or on the inside? Premature wear can mainly be a culprit of too much toe scrubbing the tire tread.
If you were to measure the rear toe change under bump with no load on the suspension (i've done this) you will get zero toe change. When you accelerate, the wheel will be pushed toward the front of the car and as the suspension squats (bump), there will now be a toe change, IE toe in. Assuming your car is stable under acceleration, what I suspect is happening is there is too much toe in as you accelerate. To solve this you would want to start with less "static" toe in on your alignment. This will result in less toe in under acceleration reducing tire wear. You will have to play around with this or maybe someone over at 1addicts, like @Optigrab suggested, has done it which will save you some time figuring it out.
Unfortunately I won't have a conclusion soon as I have another project getting in the way (grrr...). However I am looking to figure this out ASAP for developing e90 track suspensions. Hopefully in the coming weeks.