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S197 GT Spring Rates and Heights (no guessing allowed)
Trying to keep my car in F Street this year, but want to upgrade springs if legal. I want to get the benefit of the full 2010 track pack car if reasonably feasible.
Do any of you have the spring rate specs for a 2010 GT Track Pack II car? I have a vin for a 2010 Track Pack II car and my vin for the Track Pack I car (3.73 rear axle package) So far, the springs and sta-bars seem identical. Both cars call for AR33 5310 F (Yellow) for front and AR33 5560 D* (Tan) for the rear from the dealer catalogue. I know the rears have a rated spring rate of 156 lbs. I don't know the spring rate for the Yellows. Both have 36.4 mm sta-bars in the front. If this is true, the only difference seem to be the the strut assembly between a Track pack I and II car. Any additional info would be helpful.
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If the two Track Packs are calling out the same front spring by part number and tag color there is nothing to gain there, and even if there was I think you'd have to convert the rest of the car to match whichever Track Pack you picked the springs from. Aftermarket springs are out for FS and the 2014-only FSR class; they'll send you to STU, ESP, SM, or CP.
The strut assembly probably doesn't matter, since you're free to swap struts and shock absorbers (there may be some limits - I'm not entirely sure what damper allowances exist in F Street).
'08 GT/5MT (mine)
'10 Subaru Legacy 2.5GT/6MT (hers)
'01 Maxima 20AE/5MT (spare, my occasional winter driver)
'95 626/V6/5MT (still in the family but not at this address)
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