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PASM springs on non-PASM car


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I am looking to lower my Boxster slightly and I am not sure that the H&R or Eibach options are what I want as they are greater than 1" lower, and I need to clear an incline to get to my garage without scraping the front too much. I know that the PASM springs lower the car about .5" (10mm) and that is a better height, but are the spring rates not really a good match to the standard suspension? Any ideas (and the part numbers for the PASM springs)?

Randall

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I have a PASM Boxster and to be honest you can't really see the 10mm difference. As for the spring rates, the base Box PASM springs have the same rates as the stock S so I would say that the shocks would not have a problem with them. But if the reason you want the PASM springs is looks, you are wasting your money (IMHO)

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I think you are incorrect on the spring rates. The tech bulletin on the documents pages suggests the PASM springs are actually stiffer for PASM cars (the same PASM equipment fitted to S and 2.7 variants) at 30 newtons/mm on PASM versus 27 newtons/ mm on standard. The anti roll bars are also slightly bigger at 24.5 x 3.8 mm for PASM versus 24.0 x 3.8 on the S model or 23.6 x 3.5 on the base model . The PASM shock does more work in the PASM equipped car than in a standard set up , as it alters with road speed , driving style and switch operation between NORMAL and SPORT. In a nutshell the PASM car shares no common parts with a standard S or 2.7 model in terms of suspension components , springs, shocks or stabilisers (anti roll bars). If you are planning to change springs and are concerned about the clearance then a set of adjustable ride height springs and shocks suited for a non PASM equipped car would be your best option. Mix and matching PASM and non PASM parts is likely to worsen the ride quality and handling.

Edited by berty987
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That is what I was really concerned about, was a true mismatch of components. I was really trying to not go to a coilover type suspension for this, just a .75" drop in ride height through the easiest means. Thanks for the input and confirming one of my concerns.

Randall

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