
06-18-2008, 01:49 PM
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Cayman Specialist
500 post club
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Join Date: Jun 2006
Location: Quebec
Posts: 636
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Ride height revisited...and more!
Hi guys,
I have another question regarding ride height as I am trying to get my car set up properly for the track after installing a new suspension. I'll be testing all weekend but would like to have some sound advice before I have to wrench too much at the track.
Ok.....ride height. Porsche recomends a 10mm rake from front to rear (rear should sit 10mm higher than the front) and at the moment I have set up my car that way. I am under the impression that Ernie from Mantis sets up his Cayman race car level (4.0" front and rear measured at the jacking points). I would think that Ernie has it right since we drive a mid engine car that has a near perfect 50/50 balance. Am I wrong? What are other track junkies doing?
Pre-load on helper springs:
The suspension I have (JIC cross) uses helper springs much like most other coil over systems that use linear rate springs that are quite short so as to keep tension on the spring at all times and not have the main spring get loose in the perch. How much pre load should there be on these springs (when sagging)? I have been messing with ride height and now the springs in the front (helper) are more pressed together...should I be adjusting the ride height at the bottom of the shock (shock body) and keep a certain pre load on the helpers? This would mean unbolting the shock from the knuckle and having to re-align the car (again)...
Suggestions?
Thanks
Chris
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'06 Cayman S -JIC Cross, Quaife, CCW C14 wheels,MPSC's, Milltek cat back, GT3 seats Schroth harnesses, TC design bar, Pagid yellows, GT3 cup brake ducts,de-snorked, vanilla air freshener
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