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Old 01-15-2020, 02:27 PM   #1
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This thread has a lot of discussion about various spring rates and their effect.
m030 spring rates

Different drivers like a different feel so there is no one perfect setup. BSR Spec race cars run 450/500 and a lot of guys like it but I don't want a car so tied down. Too much spring on a car without LSD results in wheel spin on corner exit. Wheel spin is slow.

On my 986 BSX dual purpose Time Trial car I went with 270F/370R and it was *just enough* spring to reduce roll and make quicker transitions while still having full grip on corner exit. That car was good for 5 TT Championships so it worked pretty well and was still reasonably comfy on the street. YMMV
Topless, I'm also curious about this topic. I learned to appreciate softer from a couple of Lotus'. What tires and bars did you use? Weight? Thanks.

Last edited by Hasbro; 01-15-2020 at 02:32 PM.
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Old 01-15-2020, 03:55 PM   #2
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Topless, I'm also curious about this topic. I learned to appreciate softer from a couple of Lotus'. What tires and bars did you use? Weight? Thanks.
The car was right at BSX class weight with no gas, 2950# w/driver

Tires: NT-01 225/255 (class tire)
GT3 Front sway, full soft
Tarret rear sway, full soft (disconnect for rain)

I sometimes ran 255 square on tight tracks or AX and would take a notch or 2 on the front sway to balance the car.
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