Tom@TPC Racing

Here are two threads from different forums with a number of reviews for street and track. Different cars, same working principles.

http://www.6speedonline.com/forums/9...ension-12.html


http://www.planet-9.com/news-items/9...e-987-2-a.html

Here's a feedback from a customer who's not on forum-
Tom,

I wanted to give you a quick update. I’d been very unhappy with the Damptronic system since it’s installation. The standard mode was far too soft and the sport mode lacked a degree of refinement. The DSC unit seems to have addressed these issues nicely. I was especially surprised at how nice the car felt in base mode with the total elimination of the softness which had plagued the standard Bilstein system. The full track setting noticeably reduced front end dive under hard deceleration. In my mind the Damptronic upgrade isn’t complete until the factory control unit is replaced.

I can’t wait to see how the car feels once I’ve installed the upgraded springs and sway bars.

Thanks again for you help and for overnighting the controller.

JP.

I'm off for another 3-day track event. Have a great weekend!

chardonet

Tom:

Here is a relatively cheap mod that .1 owners did for rear brake cooling. We added the .2 OEM brake ducts onto the LCA. If you have aftermarket LCA's, you may have to tweak the ducts to secure them onto the LCA. Also, the shields should be cut for full air flow efficiency.

https://rennlist.com/forums/997-gt2-...olution-3.html

This mod may not address the outboard vs. inboard difference in temps. If I recall, there was some discussion on how the duct is aimed more toward the center of the disc, and how this may assist in dissipating heat from the inboard to outboard side of the disc. I do not know how they hold up under tracking conditions.

Part numbers are listed on post no. 1, and photos of the ducts and shield mod start on post no. 81.

Hope this may be a solution for your situation.

964Luftballoon

Fantastic thread! I'm very much a newbie when it comes to suspension geometry and settings so the discussion did go over my head a bit. I will learn though in time though with this thread as a reference. Great find on your car at a Chevy dealer no less. You are so fortunate to have a career doing what you enjoy and the wealth of knowledge learned along the way shows.

bmwtye

Will there be a group buy for us gt3 folks

John Chan

Tom,
Will TPC add manual mode just like Tenis can be adjusted at 16 settings front and back?

GT2rainge

Thanks very much for the reply I really appreciate you sharing your experience with us all.
I hope you don't mind I have a couple of other questions on the same subject.
Firstly, I have purchased a pair of rear 997 cup rear control arms, which I am fitted next weekend along with a pair of cup rear uprights (I already have the fronts), would you recommend leaving the castor pucks as there came delivered from Porsche Motorsport and just test the bump steer with the gauge with different spacers on the upright end of the steering arms. Then use the spacer with minimum change and adjust the castor puck after that if needed? Would you like to share a picture of the underside of your rear set up? I understand if you don't.
Also, do you just test one side and get it the best you can then just copy the set up for the opposite side or test that Independently?
Could you end up with each side slightly differently set?
Lastly, did you do the same with the front end set up?
I have the same adjustable castor pucks and steering arm ends with spacers for the bump adjustment.
Luckily I have usage of a hunter 4 wheel alignment rack and intercomp scales so I can adjust and tinker with my car at the weekend,also im borrowing a bumpsteer gauge.
Again I really appreciate all you help and insights to doing and working out all this stuff, your car is awesome.

Spyerx

I was just going to post a pic of the e39 m5 wheels. Remember those?Cool concept but ugly as hell looked like white walls! Your suggestion is much cooler.

Ur20v

I do and I am glad you left the photo off...Ugly!

Tom@TPC Racing

Thank you x 3.

Like any careers there are ups, downs, and challenges. This particular industry requires hard physical labor, sometimes in harsh environments. I will never become a millionaire doing this but it is rewarding in a different way.

Tom@TPC Racing

Thanks for sharing! Cooling the entire caliper will help even with the temp difference between in and outboard.

Tom@TPC Racing

Yes sir. 10% off.

Tom@TPC Racing

Likely not. Because that would take the Dynamic function out of DSC(Dynamic Suspension Control).

Tom@TPC Racing

Like I said before in post #261, there are many variables involved in determining the best clocking position of the pucks. The factory position is generally a good place to start as long as you have parts from matching generation of car. Yes I'd use spacers on the outter portion if you were to use TPC rear toe link. FYI, 997 Cup rear uprights will not fit 997 GT3/2 street car rear shocks. Or should I say they "should" not fit as the shocks have completely different mounting at the bottom.

I tested only one side. You could test both sides if you want but I wouldn't be surprised if the number deviate from one side to the other by just a little bit. If you have a reason to believe there will be a sizable difference from one side to the other due to bent part(s) or bent frame then you should be spending your time and money to make things right before you do bumpsteer.

No I didn't. At my current ride height, rate of front suspension travel, and available tire grip the front end works fine for me. I would like to map out the front toe curve in the future and see if I could make the numbers better but that's probably way overkill for a street car.

I'm afraid not. But thank you for asking. One time at a pro racing post-qualifying tech inspection the tech official told the top three qualifiers to take off one particular control arm for inspection while all three cars were in impound. The official then asked the rep from each team to a corral at a table. With all three control arms on the table(and the reps surrounding the table) the official looked at the arms for a few seconds and handed them back to each team rep. The first place and runner-up qualifiers had almost identical clocking of control arm puck and almost same number of shims. The third place guy had something completely different. We were all surprised that all were allowed to see each others setup. At that brief moment there was tension in the air and I think the official realized that he probably shouldn't have done that. To break the tension, one team rep pointed his finger at me and said "C for Cheater!". Then I pointed my finger back at him and said "SC for Super Cheater!" And then we all laughed, took our control arm, and walked away from the table. This never happen again. I'm sure the 3rd place guy made some changes because he picked up the pace. So the moral of the story is there are some things we just don't share...

GT2rainge

Thanks Tom I really appreciate you taking the time to read my questions then reply with so much useful information I've learned a lot from it
I fully understand not wanted to post a picture of you suspension at the rear, guarding the companies secrets is priority and a lot of time will have been invested in knowing a good set up that works.
With regards the rear uprights, my car is a 996 gt2 so I have the correct shocker fitment. I'm looking forward to getting them fitted hopefully this weekend, then setting everything up and trying it out.
I look forward to seeing the updates on your car and watching it evolve further.

Tom@TPC Racing

You're welcome.
Got it on the 996 rear shocks. You're correct they'll fit 997 Cup rear uprights.
997-type uprights on 996 is totally adapting parts from a different generation car.
This requires a lot of time to get right so best to just take your time and not rush it.
Will need to custom make hardware to mount the rear sway bar depending on whether you mount the drop links to the shock bodies or the new uprights.
Good luck.