ECS

Am curious if anyone has made this modification? One of the highlights of the 997.2 over the 997.1 was an improved suspension. Is it as simple as installing 997.2 PASM shocks and springs or should one be concerned with all sorts of other subtle differences in the 997.1 car vs the 997.2 that would make this change ill advised?

Supermode

When I was in the market before I bought my 997.2 C4S, I test drove both versions and found that the .1 had a stiffer ride with PASM on. Mine has SPASM and its a mucher stiffer ride than normal PASM on .2's. It actually reminds me a lot about the .1 ride. I never have it on unless Im on the highway. Its too much for the streets of Chicago.

Hella-Buggin'

You're best bet is the DCS from TRP Racing. It will give you the Three axis (vs. 997.1 Two Axis) modulation and un upgraded PASM control module.

Tom@TPC Racing

By changing to .2 shocks, springs, and even sway bars will not produce the exact same results as in .2 car because the commands for the level of stiffness to the shocks from the PASM module is different between .1 and .2 cars, and for different models and options. For example, .1 PASM Sport mode commands 75%, while .2 PASM commands 80%, .2 SPASM 90%, GT3 95% and so on... The factory PASM modules are coded for specific generation, model, and options so they won't function at all when its installed in the wrong car! It will display "PASM Fault" as soon as the ignition is turned on without even starting the engine.

Years ago, prior to DSC, I experimented with swapping PASM shocks, springs, bars, and then to Damptronic coilovers and then with different spring rates. Even gone as far as revalving Damptronics. While I was able to feel each change, the results were ultimately limited by the command to the shocks from the PASM module. I was able to work around some of the damper stiffness limitation to get the balance I wanted by using heavy sway bars like the TPC bars and by upping the spring rates. That was a lot of work! Now that DSC is available, the issue with damper stiffness commands is solved in a seamless manner.

If the shocks, springs, and sway bars are in good working condition then there's no need to change these items to exceed both the comfort and sport performance of that on a .2 car. Swapping out the PASM module with DSC module will do that. And DSC can be custom mapped by the user via free tuning software(with DSC tech support). .1 car requires an accelerometer since the factory .1 accelerometer is only 2-axis. Its 3-axis on .2 cars. In order to achieve 3D mapping on .1 car a 3-axis accelerometer is required.

If you must have original factory Porsche parts then the best you can do is swap to .2 shocks, springs. and sway bars for a portion of the difference in performance with 2D damping commands for .1 PASM module.

ECS

Wow, Hella Buggin and Tom-TPC. Great information. Thank you. I will look into DCS.
Erik

motopix

TPC, will my 997.1 DSC module move right over were I to buy a 991.X car?
How about other P-models with PASM?

ECS

Hella,

My one concern with such an active suspension system is that it will feel unnatural. Have you used it?
Thx

Tom@TPC Racing

997 and 991 module are completely different. See image below.

991 DSC module have extras pins for factory ride height sensors data for Suspension Velocity tuning function and dynamic engine mount tuning.


We could develop DSC module for other p-car, but currently we are focusing on sports cars(Porsche sports cars, C7 Corvette, SRT Viper, Nissan GTR, Ford GT350), next is resto mods. Crossovers, SUV's, and sedans are not on our radar at this time.

Tom@TPC Racing

My apology for answering out of turn. There are no shortage on threads and individual owner reviews on the DSC module here on rennlist and on 6speed forums. The only thing unnatural about DSC is that the handling and stability is so good that its uncanny. The damping management on the current DSC 2-mode version is seamless.

Hella-Buggin'

I haven't used the DCS unit but if you have pasmnyoure riding on a active suspension system already. One that's 11 years old. Think about whatnot would believe to have an 11 year old iPhone or laptop. I have a few friends with the tpc DCS unit and they like it.

ECS

Thanks all!