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Why do you say I wouldn't want Hoosiers for a full track? It seems to be the tire of choice for PCA races. Perhaps you're thinking of a different Hoosier tire. The popular tires are the A3S04's and and now S05's. https://www.hoosiertire.com/rrtire.htm
I just got my Cayman S yesterday. I do note that you have to be careful entering driveways and parking lots. I agree that I wouldn't be able to go a lot lower, but maybe another cm. One cm makes a substantial difference between PASM and non-PASM cars' appearances. If one cm is good, two must be better... Does anyone know how the US PASM equipped cars differ from the European versions? I am guessing that the European cars' ride height is lower, and if the PASM dampers and sway bars are the same, then a spring change and possible PASM recalibration could be all that is needed. Again, I am not rushing off to make any changes and won't make any changes unless I can get some solid info on tried and true setups.
Has anyone lowered a car with PASM? I searched the forums and only found one poster who lowered a 997S by 35 mm using H&R springs without any problems. Loren suggested in February 2005 that it might throw off the calibration of PASM, etc. I am taking delivery of a Cayman S and would love to lower it another inch or 2, both for looks and for track, but obviously need specific info. One curious question related to this and to PASM: Are the standard spring rates more suited to the sport damping setting or comfort setting? If they are relatively softer springs, it would increase the chances that a shorter stiffer spring will work without any PASM modifications.
For performance and comfort, get PASM and 18" wheels. There is a lot of debate, but I think most feel that the 18" wheels give better performance due primarily to lighter weight. The ride is also better. The 40 profile tires should give enough clearance to avoid many of the dings you get with other setups. (Note that the 40 profile 18" or 35 profile 19" makes for a very large diameter). The PASM gives better ride and performance as well. The Sport Chrono is nice, but less essential than the PASM. It does offer a sport mode that detunes the PSM to allow a little more oversteer, particularly in low speed turns, so if you will track the car, it's essential. The stop watch feature is strange in my mind. If they wanted to do something for the track junkie, they could have done so much more given the number of sensors in the car and GPS. You could have an awesome data acquisition system when integrated with PSM, but all they give you is lap times. But it's the only way to get the "Sport" mode, which is different from the "Sport" PASM setting. I haven't compared the sound systems, but I presume the Bose Surround is another "essential" item. In the interior, the $250 sport steering wheel is much nicer looking in my opinion than the standard 3 spoker. I have heard mixed reviews on the sport seats, so if you consider nonstandard seats, you would be well served to go to the dealership and try sitting in them. PCM/Navigation is a personal thing. Navigation is a fun gadget, but not essential unless you do a lot of traveling.
I am taking delivery on a Cayman S and want to get a set of track wheels and tires. I really want to run Hoosier S04's or S05's, but they are limited on available sizes. There are no 19 inch tires. The closest 18 inchers are 245/35 for front and 275/35 or 285/30 for rear. This is as compared to my stock 18 inch 235/40 front and 265/40 rear tires. The Hoosiers would end up with a tire diameter 1.5 to 2 cm smaller than stock. Any thoughts or alternatives anyone?