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      04-24-2012, 09:02 PM   #75
HP Autosport
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Drives: F80 M3
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Performance Friction, www.hpautosport.com

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Quote:
Originally Posted by Texas F1 View Post
Neil, I'm getting a set of AST 5100s installed at Vorshlag in a couple weeks and I'm trying to decide on spring rates. They use the Hypercoil front and Swift rear springs for most applications. Some of the combinations I'm looking at are 450F/672R; 550F/784R; or possibly the stiffer 600F/900R. I'm leaning toward the middle combination of these three. Yours is closer to the softer selection.

For occassional track days, maybe some auto-x, and mostly recreational driving, any suggestions based on these options? I'll probably have the car lowered just slightly.
I would go with the softest of the rates you have there and even lower on the front, 400F is plenty for a car that don't see much track duty.