Explanation of the overall suspension tune
Posted 05/31/2013 10:57 AM
The car weight after applying all weight reducing options came in around 1092 kg meaning the first place to start was the spring rates in order to control the weight transfer as well as tuning overall oversteer/understeer (as best as we can). Knowing the weight, the car's overall spring stiffness must be at least 12 kgf/mm or more both rear and front. This will explain the spring setting I have picked.
After that the ride height was adjusted next with the car sitting 4 mm lower than usual to reduce the amount of weight transfer under acceleration and braking. Also with a sight lower center of gravity the car handle better.
Next was the dampers, they were tuned in order to help maintain the tyre contact patch as well as to further control weight transfer. Note that I did not mess with the anti-roll bars. I felt as if the other components did enough to control overall weight transfer and the transition of over/understeer.