TB993tt

Excellent..... May I ask what car is it going on and what spring rates you opted for ?

LateBraking

997.1 GT3. As for the spring rates, I'm not sure, I left the decisions in Tom's hands. I figured with their knowledge behind the Tractive shocks and DSC it'd be best to let them handle it.

Tom@TPC Racing

Thank you for your feedback and for the photo. I love how DSC seamlessly sets the damping on turbo cars getting on boost with the driver feeling the exhilaration but the chassis is so hooked up. The GT Sliver is stunning!

I test drove a stock PASM car today after doing routine service work. Man, I have been completely spoiled by DSC/Tractive suspension that driving this car was just no joy.

Tom@TPC Racing

On LateBraking's 997.1 GT3 we are installing the same spring rate as yours. Swift 60/100nm (336/616 in-lbs). These springs with our spec preload as they were set on your Tractive coilovers are lovely to drive on street and track.

Edit for typo: I meant Swift 60/110nm (336/616 in-lbs).

gasongasoff

Thanks for the thoughtful response, Tom. It actually prompted me to rethink what I was experiencing, and as it turns out, it was more complicated than I originally thought.

Stiffening the DSC in the front (relative to the rear) did make the initial turn-in feel sharper, but right afterwards, the front would come out (understeer). And so I went back to stiffer rear>front, and the understeer is gone.

I think I have everything dialed in where I want it now. Thanks, Tom and to everyone at TPC for making this wonderful product.

Tom@TPC Racing

Well done! Proper use of DSC to custom tune for corner entry and for exit.

LateBraking

I don't have quite as much power as you, so I wouldn't know about having to hook up turbo power. However, I do have a disk bulge in my spine, and on my 4.5 hour drive back home across all sorts of roads from rough to unpaved gravel paths (stupid Apple iPhone navigation took me on all sorts of dumb routes), I only had back pain on two instances, instead of two long sections of road. So far, color me impressed.

Also acted like a little bit of a goof on some curvy sections of road, it just feels like the car tightens up around you. I could write something more thorough but I'm not sure if this is the thread for it.

Stock is okay. DSC is much better than stock. So are JRZs, which are probably my usual go-to. DSC combined with Tractive is fantastic though.

Tom@TPC Racing

We are very glad to hear your return trip with the new suspension was noticeably more compliant than the drive in. It really means a lot to us that the new compliance will allow you to enjoy your GT3 more. Your impression of the results is of very high regard to me personally. Thank you.

User 52121

WOW I am glad I found this thread. 18 pages?!

I have a lot of reading to do (currently only on page 2). I just acquired a car (06 Cayman w/factory PASM) that appears to have a DSC sport box on it. I know it's not on the stock PASM shocks, I *think* it's Bilsteins but might be the DDA's (long story short about WHY I don't know... bought the car as a carcass, kept some parts, replaced a lot of others... shocks and the DSC box were kept, and I know the shop that did the build for me said "looks like Bilsteins... you want to keep these or you want us to toss in JRZ's instead?" I opted to keep what was there vs. spend more money on JRZ's.)

Is there perhaps a manual or something somewhere that I can download? I've been able to figure out there are different "modes", as well as opportunities for uploads, etc... but I have 0 idea on how to interact with it or do any of that.

Thanks in advance (and I'll keep reading....)

Jim

User 52121

So thanks to this thread, and the link to the 997 installation guide, I learned that the little black box with the "DSC Sport" sticker on it is actually the accelerometer... that is supposed to be mounted flat and oriented such that the little chevrons in the logo on the sticker are aimed towards the front of the car.

On my car, the little box is just dangling and bouncing around (from the previous owner who installed it).

At Road America over this past weekend I was having a hard time braking into T12 and T14, as there are bumps in the braking zones. Car would POUND over them and get into ABS unless I braked early.

I wonder if this little box bobbing around was part of the problem....

Larry Cable

TOTALLY! the accelerometer *NEEDS* to be statically oriented along the major axis (roll, pitch, yaw) of the car in order to provide the proper inputs to the
DSC for it to calculate the appropriate inputs to the PASM shocks ... given
that the accelerometer was neither attached nor oriented to the car properly
the inputs would pretty much like rolling a set of dice in a blender... my guess
is that in the presence of 'nonsense' inputs the behavior of the DSC would be
to put the suspension into full stiff

User 52121

Now I know what I'm going to mess with when I get home from work tonight LOL.

User 52121

Just looked at a pic I snapped of the box (so I could remember to research it later)... it was definitely mounted mostly backwards (chevrons pointed towards the rear) and otherwise just kinda wedged under a chunk of wiring harness in the rear hatch area.

The box applying suspension adjustments thinking the car was going in reverse is I'm sure gonna mess with things a little... not to mention right/left being backwards!

User 52121

Ok so there was actually some velcro buried under the harness, the DSC sport box was "affixed" but it WAS backwards. The chevrons were aiming towards the rear of the car vs the front. I flipped it around and made sure it was tight.

I did notice that there was a black wire on the harness to the box that had an eyelet crimped on it, but was not connected to anything. Based on the length, etc it looks like it went to a nearby grounding post.

Safe to assume that black wire is a ground?

I noticed if I pressed the shock button on the dash (it's always lit solid) it (repeatedly) blinks twice, and if I press it again, it (repeatedly) blinks three times. Press it again and the light stays solid.

I assume that's the 3 "modes"? Street, Sport, and Track?

LateBraking

Aye black is ground.

Aye. Solid is street, blink is sport, double blink is track. I think.

Send it in for an update. TPC now has only two modes, street and track, with each mode covering a larger range of activities. It also talks to the dash now so the PASM stuff shows up like stock.