Stock Spring Rate Change? What would you recommend?
07-16-2013, 09:46 AM
#17
Rennlist Member
All good advice--thanks. I agree with your "more aggressive" alignment set-up recommendation. I laminated the outside of a MPSC after only 12 HC, and the inner tread was nearly new--more negative camber!! I think I have -2.2 now. Car is going in end of week. Have to run on my MPSS (rain tires) for coaching day this week.
I remember looking at your tires and the wear is all on the outside of both front and rear tires. Not only will a more aggressive alignment give you more lateral grip, it will extend the life of your tires tremendously. 12HC with cording on the outside is nuts.
Talk with Aaron, but I think we will both agree you need something in the range of -2.7 to -3.0 front, -2.0 to -2.3 range for the rear. Test, then adjust from there. With a new alignment you will feel like you have a brand new car and springs will be the furthest thing from your mind.
08-09-2015, 10:09 AM
#18
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2010 GT3 (non-RS), 11,000 mi; the last half all track. It has GMG Tarmac series suspension components, magnetorheostatic engine mounts and bone-stock shocks. This is essentially a track-only car, trailered to events. Should I increase the spring rates, and if so, should I keep the stock shocks, exchange springs for slightly higher spring rate and leave the rest alone, or change springs and re-valve the shocks OR replace the shocks? I am not the guy who changes tons of things at the track--the regular and Sport settings are enough for me. I could also just leave things all stock--just wondering if I don't need any comfort factor since it is not street-driven, am I compromising performance at the track by using the street suspension? Thanks for any feedback.
I went with 850# upfront and 1100# in the rear with a revalve of the struts. To make the whole system work, i run either yoko or pirelli slicks w/ a very aggressive track alignment. I just added some additional front and rear downforce to the car with aero as well. I have data to share if you're an AIM user from VIR if you want to compare setups.
