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    Results 1 to 6 of 6
    1. #1
      Join Date
      Apr 2009
      Location
      Michigan
      Posts
      266
      Country Flag: United States

      Free suspension Kinematics and Compliance data - modern performance cars

      Hello all,

      I'm working on spring and sway-bar selections for my 1968 Firebird, and I wanted to benchmark some newer cars to see if my design was in the ballpark. Usually, real data is hard to come by, but I vaguely remembered seeing some kinematics and compliance (K&C) measurements for various cars in Car and Driver magazine a couple years ago.

      I dug though the archives on Car and Driver's website and finally came across the data I was after. Car and Driver had Morse Measurements do K&C measurements on several of their long term test cars that year. Morse Measurements uses a fancy kinematics and compliance rig to measure actual vehicle behavior, and I have high confidence in their data.

      I found the data very valuable, and I hope you do as well. I've attached the .pdf's I downloaded from Car and Driver's website below. I don't think there is any issue in sharing these since they're readily available online (if you know where to look).



      Useful data includes:
      • CG heights
      • Roll center heights
      • Suspension stiffnesses (so you can calculate ride rates etc)
      • Roll stiffnesses
      • Anti-squat / Anti-dive


      2014 CTS-V K&C.pdf
      2013 BRZ K&C.pdf
      2014 Focus ST K&C.pdf
      2013 Mustang GT K&C.pdf
      2013 Accord Sport K&C.pdf
      2014 Corvette K&C.pdf


    2. #2
      Join Date
      Nov 2016
      Location
      Sulphur, La
      Posts
      453
      Interesting info for sure, thanks for posting. I was surprised at the roll axis inclination of the mustang.

    3. #3
      Join Date
      Sep 2010
      Location
      Beach Park IL
      Posts
      2,533
      Country Flag: United States
      You can only get the panhard bar so low in a factory application. That is a large part of why those cars responds so well to the various aftermarket watts links.
      Donny

      Support your local hot rod shop!

    4. #4
      Join Date
      Apr 2007
      Posts
      172
      interesting the Corvette has under 115 lb-in wheel rate in front

      Also cars using 200% rear anti lift under braking... am I understanding that correctly? Isn't that trending toward removing the weight off the tire contact? ie picking the tire up off the road?

    5. #5
      Join Date
      Apr 2009
      Location
      Michigan
      Posts
      266
      Country Flag: United States
      Good question - I have to do some more reading to really understand anti-lift/anti-dive. Here's a link to a long thread on the topic if you have time to look into it: http://www.pirate4x4.com/forum/gener...h-twist-9.html

    6. #6
      Join Date
      Aug 2004
      Posts
      957
      I highly question the Anti -dive/squat numbers, they do not make sense at all.