Quote:
Originally Posted by IamFODI
I was getting FRC% numbers in the mid-50s with the stock setup. 
Guessing the calcs you're using are estimating ARB rates based on diameter and tubular vs. solid. Is that correct? If so, maybe that accounts for some of the difference.
I found an Eibach PDF that gave actual measurements for the stock ARB rates: 194 lbs/in front, 112 lbs/in rear. Attached it here. Dinan says their front ARB is 50% to 90% stiffer than stock, so 368.6 lbs/in max. Those are the values I used.
Again, not saying I did everything right. |
No worries. I'm not sure I am doing everything right either. I do find it hard to believe that the FRC is below 68% if the stock E46M3 is that.
https://www.fatcatmotorsports.com/FC..._M3_Online.htm
A few friends and I extrapolated FCM's spreadsheet and adjusted all the values that were required in blue for our own chassis purposes. I've been working on the E90M3 one this past week.
Davisca455 was kind enough to get measurements of the swaybar based on this image:
Rear:
A = 8.3125"
B = 29.00"
C = 13.00"
D = .900"
Front:
A = 9.625"
B = 23.50"
C = 11.50"
D = 1.05"
Of course I dont have the exact measurements of the Dinan or Eibach sways as most likely B and C are different by a bit.