• Compression zeta (c-zeta) is used to create target damping curves for both bv and mv compression force.
    • The bv and mv force is reverse engineered from the curve, then 2 lbs of target drag is added. 
    • This =  co wogas [target].
  • There are currently three c-zeta damping curves.  We simply call them  'a',  'b',  'c'.  
  • Curve  'a' (blue) is from (3253)f 4CS fork. This fork works extremely well.
    • 'a'  is softer than 'b' from 3-60ips, crosses over about 70ips then amps up more as velocities increase. 
    • This is due to the 20mm mv piston and small mv ports.
  • Curve  'b'  (red) is from (2151)f KYB forks.
    • 'b'  is stiffer at 3-60ips, then the comp force drops off as velocities increase.
    • This is because the KYB fork has larger mv piston with larger mv ports.
  probably 4CS only   KYB
ips bv aver a x 1.0 mv aver a x 1.0   bv aver b x 1.0 mv aver b x 1.0
3 2 .1   2.8 .1
10/20 5.6 2.2   6.9 3
70 16.7 19.4   16.6 19.5
100 20.9 35.2   20.2 32.2
150 28 62   26 53
400 66 195  

57

 158
  • Here is another look at curves  'a' and  'b'.
    • This compares  soft 'a'  vs  aver 'b'.
    • They start about the same at 1-2ips, then blue curve 'a' is softer and it will eventually catch and pass red curve 'b' at about 120ips.