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So now that the 2014 season is over for me and I won't start back up again until spring next year I was looking to make some upgrades to my suspension to try and help get me to the top of TTD in my region at NASA.
Currently I'm running the Ohlins Road & Track coilovers with the default springs (~342 lbs/in). These have been great on the street and even the track with street tires, but I don't think they have been quite up to snuff when I throw the Hoosier R6's on. I get a fair amount of body roll which I'm sure isn't helping with the inside wheel slipping I've been seeing, which I'm also planning on getting an upgraded LSD to help fix that as well.
Now, I am looking to increase the stiffness of the springs significantly and am planning on sending the coilovers to Ohlins to get revalved (assuming the cost is reasonable). So, my question is how stiff should I go? I'm not really concerned with street comfort any more, and since I'm planning on getting them revalved, I guess the sky is the limit. I was thinking something like 650lbs/in front, 750 rear but am open to suggestions. I got these numbers from my current nemesis on track who uses these rates on his E36 M3 (~3200lbs race weight). I know you can't directly compare different cars, but I figured it might be a good starting point. I am not running any downforce and am planning on running either 225 Hoosier R7's or 225 Maxxis RC-1's for next year and my race weight is about 2900lbs.
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