JR956678

I found this write-up on how to install a DSC V3 in a 991 cabriolet - post 6 on this page:

https://rennlist.com/forums/991/9069...available.html

pepinozaur

Guyts how do you reset the height sensors? Going to install my v3 soon

Jean

Good write up Randy, 1.5+ seconds is what I gained going to very expensive full competition suspension and setup data by Manthey..
I am only interested in fastest lap for time attack.

Do you know whether Mike runs the DSC in his Street Car Challenge?

Jean

Please do a before and after lap time test!

Randyc151

I know he does, and I use the same map, installed by him. He offers the DSC tied to a full race suspension option, too. Unfortunately, my TTS is back to stock now and for sale at Euroclassics Porsche, so no more data coming from it.

https://www.euroclassics.porschedeal...d40d65783c.htm

Randyc151

Reviving this thread, since there is some good discussion happening at the moment around the DSC boxes on other threads.

hcvone

Put these units in our two turbo s's, and what a HUGE DIFFERENCE, even better handling and a smooth ride on all road surfaces, wish I got these sooner

2fcknfst

I just received my Techart lowering springs, they will go in next month - this is of interest to me, and may very well be an addition I may want. Thanks for being the champion Randy.

JR956678

I've had a DSC V3 on my 2017 TTs since last September or so (as soon as the firmware to fix the old issue with sunroof and FAL) and about a month ago got the notice that the car was due for an intermediate service. I pondered whether to put the factory PASM controller back in but decided to talk with my Service Advisor before doing that. I explained what I had and what it did and he was very cool about it so I left the DSC in - not sure if they would notice it or not.

When I picked the car up my SA thanked me for letting him know about the DSC V3 - the tech had in fact noticed some sort of anomaly in PIWIS when he connected to the car but knowing about the DSC (the SA told the tech about it) saved him a lot of time trying to figure out what was causing whatever it was he saw. So to answer the question - "Can you see something in PIWIS when you have a DSC V3?" the answer appears to be "Yes you can" but as long as you have an understanding Service Advisor the dealer would be OK with it and you'd do them a favor by cluing them in.

Tfk

It's specifically this ^ that has me torn between keeping my 991.1tts on Techart springs (and adding dsc v3), or, swapping out the techart springs/oem shocks... for Ohlins coilers.
I'm happy with the ride height on Techart springs.
I'm not happy with the harshness, or the unpredictability which the progressive springs have brought into the picture.

Ohlins would entail PDCC delete; not necessarily a bad thing if a 'golden middle ground' - between ride quality/performance - can be found.

Thoughts?

2fcknfst

I suppose the answer revolves around what you want out of the car. I didn't even know about the DSC controller until this thread, so I'll start with the springs, get some feedback from the chassis and then decide on the DSC. I would think that if you are going to track it, those super sexy Ohlin's may be the way to go.

Tfk

I'm chasing ride quality/compliance/composure/connection.

I track the car once or twice a year.

Both my bikes run Ohlins suspension.
Took me some time to manually adjust compression/rebound/preload and geometry to my liking. But once that was done... Perfection achieved.
If that's anything to go by, then I'm pretty certain I'll be happy installing Ohlins on the tts.

DSC, I have experienced twice. Two different Porsche turbos; neither a 991.
1 997.1tt Stock suspension + DSC controller: Tried on track- Didn't feel a difference in ride/handling compared to stock. But the numbers do not lie. The numbers/lap times did improve; more than I expected (going by feel).
2 997.2tt Bilstein coilovers + DSC controller: Tried on the street. Couldn't believe the drastic improvement in ride quality. Total transformation. Left me in awe. Catch is, I never figured if that was the work of the coilovers or the dsc module. Hence, my predicament.

Regarding the (progressive) Techart springs *without dsc module*...
I can tell you that the aesthetic ride Height improvement is awesome. But it noticeably sacrifices ride quality and suspension travel/behavior predictability; which works against one's confidence while driving.
At slow speed they are harsh. The kind of harsh that almost makes me question why I traded my GT3 for the TTS.
At medium speed they are soft. Softer than stock. So soft they make me double and triple check that the lip spoiler is not extended. Otherwise goodbye spoiler (expensive on the turbo).
At high speed they are firm, yet not firm enough to drop my lap times around the track.
All in all, the springs seem to constantly transition between harsh-soft-firm making it harder for me to gel/sync with the car.

In my experience, the springs offer One clear benefit; aesthetic improvement.

For what its worth, I was advised to skip the springs and either leave my suspension stock, or, go to coilovers from the start. I didn't listen and I wish I had.
Proof: question stands...add dsc, or go Ohlins?

Randyc151

For a car you track once or twice a year, I can't think of a reason not to just do the DSC and declare it a victory.

JR956678

I think I would agree with Randy's post above - the DSC V3 with whatever springs you have or want would seem to me to be the best fit for your objective - it certainly delivers those objectives for me with stock springs.

hcvone

Having put this controller in my two Porsche's now, you can install and remove it in way under 5 minutes if you are worried about the dealer visit