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There is a wealth of information on this board about the different suspensions available for a 996 and ride height (thank you Loren and members!) but I haven't been able to find much opinion/fact about how to set up a car when the ride height is entirely up to you as it is with the PSS-9.

My head is filled with so much data I need help from you guys to sort it out :help:.

The car is a 2003 C2 Cab with 18" wheels. It is driven "spiritedly" on the street with some auto-X. I like the functional benefits of lowering like a lower CG and reduced roll more than I care about the cosmetics (although they're pretty nice too).

It makes sense that as you lower the car the suspension geometry changes, not only statically but in its arc of travel as well (your normal range of motion is now in a different part of the design arc). How does this change your alignment settings and how do you communicate that to the alignment shop?

This topic has great info on the ride height and alignment differences between different Porsche standard suspensions. It also points out that you can't just set up a C2 like a GT3 because there are suspension component differences other than the struts, shocks, and springs.

I'd like to set the ride height to GT2 or GT3 specs but what alignment settings should I use? For instance, the choice of "toe difference angle" has me perplexed.

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Be careful going too low with that setup.

The PSS9 has internal lower bump stops. It you lower to GT2/3 height you may 'bottom' out the strut during hard driving.

Go here and search for "PSS9":


There's one guy that did what amounts to a PHD thesis on the PSS9 setup.



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