Originally Posted by HP Autowerks
Originally Posted by e679
To make thing more complicated. The sways bar stiffness should also match the spring rate?
Yes, you are correct.
We would typically tune with spring rates first, then use anti roll bar or bars at the very end to balance the handling or make fine balance adjustments. Remember, larger/stiffer isn't better. Lifting the inside tire off of the ground in a turn may look cool, but it's the the fastest.
If you can't alter spring rates, a larger than stock bar or bars or adjustable ones will have to do.
Let say I am planning to put 400/ 900 on my 335 e93. Since I believe I have to install M3 bushing with this high rear rate, I better install rear sway together. I have exprience that 400 front with ohlins on sti is very comfortable. Will 900 safe on the e93 subframe? Is 20mm rear sway a good match with 900 or I need thicker? ( I rather put on a LSD than changing the rear sway if it doesn't match)
E93 335i Alpine White, 19" Works, PSS, M3 arms, M3 bush,M3 E93 FSB/E92 RSB, powerflex rear diff bush.