TPC DSC
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Joined: Mar 2002
Posts: 1,930
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From: Greater Boston
Just got the TPC DSC installed on my '07 GT3 this week. I have only one day of street driving on it so far and won't get to the track for the season's first event until next month. My first impression on the street is that it's very different than the OEM PASM. There is much less bouncing up and down over bumps. Even the firmest setting feels acceptable on bumpy roads, which was not the case for factory PASM in the "firm" mode.
After I get in more driving time, I'll file another report.
After I get in more driving time, I'll file another report.
Instructor
Joined: Jan 2014
Posts: 134
Likes: 1
From: St Charles
Finally installed my TPC DSC unit in my 997.1 GT3. Initially attempting to install the DSC box was a PITA until I exchanged e-mails with Tom at TPC Racing. I just needed to add a little light under the kick panel to see and add a little more pressure on the tab to release the box. The exchange of the PASM box for the DSC unit took 3 minutes. Wiring the accelerometer was not bad at all. I had maybe 1hour and a half in the total install quick test of the wiring and reassembly.
This weekend I drove extensively on the Highway 583 miles to be exact to drive the 991 GT3 at the Extreme Driving Experience at the Autobahn Country Club in Illinois. I must say, the ride up I 55 was much more compliant and improved over bumps and the car also felt much more planted at speed as others have stated. Additionally, in the past, my GT3 would skip slightly taking off ramps aggressively, the skip has disappeared which I found shocking so I'm guessing more grip which brought a huge smile to my face versus the first time I felt the skip and my butt puckered. No dive on braking was also noticed. After all the reviews if you are STILL on the fence with the TPC DSC box, get off it and get one tracking or not.
This weekend I drove extensively on the Highway 583 miles to be exact to drive the 991 GT3 at the Extreme Driving Experience at the Autobahn Country Club in Illinois. I must say, the ride up I 55 was much more compliant and improved over bumps and the car also felt much more planted at speed as others have stated. Additionally, in the past, my GT3 would skip slightly taking off ramps aggressively, the skip has disappeared which I found shocking so I'm guessing more grip which brought a huge smile to my face versus the first time I felt the skip and my butt puckered. No dive on braking was also noticed. After all the reviews if you are STILL on the fence with the TPC DSC box, get off it and get one tracking or not.
Pro
Joined: Dec 2006
Posts: 567
Likes: 1
From: Bay area, California
I installed DSC with 3-axial accelerometer on my .1 GT3 RS last year and had posted a good review of the transformation of the stock PASM behavior on street. Car felt stable in corners and had less dive at aggressive braking. Bump was soaked up very well.
This year I finally have a chance to drive it on the track and have good news to report as well. Last year at the Thunderhill track my best time was around 2:15 with RE11 tires. I know the car can take more speed, but the stock suspension did not give me the confidence to push it in corners. The TPC DSC transform the damper behavior of the stock PASM and gave me the confidence to push the car more. Without changes to my camber setting (-2.3F/-1.8R), but with new tires (MPSC2), I was able to pull 1G at T2 and T3 at Thunderhill and achieve a 2:09 lap. This was done with mode 3 of the DSC unit. Car felt stable and boost my confidence quite a bit to push it. Definitely one of the best suspension mod ever for my street/track mixed use.
This year I finally have a chance to drive it on the track and have good news to report as well. Last year at the Thunderhill track my best time was around 2:15 with RE11 tires. I know the car can take more speed, but the stock suspension did not give me the confidence to push it in corners. The TPC DSC transform the damper behavior of the stock PASM and gave me the confidence to push the car more. Without changes to my camber setting (-2.3F/-1.8R), but with new tires (MPSC2), I was able to pull 1G at T2 and T3 at Thunderhill and achieve a 2:09 lap. This was done with mode 3 of the DSC unit. Car felt stable and boost my confidence quite a bit to push it. Definitely one of the best suspension mod ever for my street/track mixed use.
Drifting
Joined: Nov 2006
Posts: 2,027
Likes: 5
From: SF Bay Area
I installed DSC with 3-axial accelerometer on my .1 GT3 RS last year and had posted a good review of the transformation of the stock PASM behavior on street. Car felt stable in corners and had less dive at aggressive braking. Bump was soaked up very well.
This year I finally have a chance to drive it on the track and have good news to report as well. Last year at the Thunderhill track my best time was around 2:15 with RE11 tires. I know the car can take more speed, but the stock suspension did not give me the confidence to push it in corners. The TPC DSC transform the damper behavior of the stock PASM and gave me the confidence to push the car more. Without changes to my camber setting (-2.3F/-1.8R), but with new tires (MPSC2), I was able to pull 1G at T2 and T3 at Thunderhill and achieve a 2:09 lap. This was done with mode 3 of the DSC unit. Car felt stable and boost my confidence quite a bit to push it. Definitely one of the best suspension mod ever for my street/track mixed use.
This year I finally have a chance to drive it on the track and have good news to report as well. Last year at the Thunderhill track my best time was around 2:15 with RE11 tires. I know the car can take more speed, but the stock suspension did not give me the confidence to push it in corners. The TPC DSC transform the damper behavior of the stock PASM and gave me the confidence to push the car more. Without changes to my camber setting (-2.3F/-1.8R), but with new tires (MPSC2), I was able to pull 1G at T2 and T3 at Thunderhill and achieve a 2:09 lap. This was done with mode 3 of the DSC unit. Car felt stable and boost my confidence quite a bit to push it. Definitely one of the best suspension mod ever for my street/track mixed use.
Going on that.
I'm pretty consistent driver.
Last time out at thill.
I did back to back hot laps on oem unit vs TPC.
I have a set rev limiter at 7k ( I don't like revving to 8400 ) for me personally and I achieved 2:04 w stock pasm
2:02 w tpc unit... Ftw at thill.
Pro
Joined: Dec 2006
Posts: 567
Likes: 1
From: Bay area, California
This is an even better testimony than mine since your time is closer to the limit of the car, and 2 seconds at your level is pretty big, in my opinion.
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Joined: Mar 2002
Posts: 1,930
Likes: 14
From: Greater Boston
I'm just back from 3 track days at NHMS last weekend, my first test of the TPC DSC on the track. Those of you who have driven NHMS know how hard the bumps are on cars.
I started out with the softest DSC setting. My impression after the first run was that they fixed the bumps on the track. It was that different from stock PASM. I could have probably driven the entire event on that setting but I went up to the middle DSC position and left it there for the rest of the weekend. I felt that was the best compromise of compliance over bumps and chassis response in the corners and chicanes.
I think this product is a winner.
I started out with the softest DSC setting. My impression after the first run was that they fixed the bumps on the track. It was that different from stock PASM. I could have probably driven the entire event on that setting but I went up to the middle DSC position and left it there for the rest of the weekend. I felt that was the best compromise of compliance over bumps and chassis response in the corners and chicanes.
I think this product is a winner.
Rennlist Member
Joined: Aug 2013
Posts: 48
Likes: 0
From: Granite Bay, CA
That's encouraging to hear you feel that the TPC was attributable to 2 seconds at THill. I can consistently get 2:01's and 2:02's in my 997.1 GT3 with clean runs but have not been able to do sub-2:00. Are there specific turns that you are getting through quicker? I've been running NT-01's and was going to cheat and put on Hoosiers to see if I could get closer to 2:00. If the consensus is that it would help get a second or two, I'll order one this week. All I need is 1:59.99 (over the top of turn 5) to feel that my life is complete.
Drifting
Joined: Nov 2006
Posts: 2,027
Likes: 5
From: SF Bay Area
That's encouraging to hear you feel that the TPC was attributable to 2 seconds at THill. I can consistently get 2:01's and 2:02's in my 997.1 GT3 with clean runs but have not been able to do sub-2:00. Are there specific turns that you are getting through quicker? I've been running NT-01's and was going to cheat and put on Hoosiers to see if I could get closer to 2:00. If the consensus is that it would help get a second or two, I'll order one this week. All I need is 1:59.99 (over the top of turn 5) to feel that my life is complete.
That said, the transitions are a lot smoother with tpc unit. Turn 2-6 is were you really feel it working for you. Again going through the fast sweeper 8. Really helps getting close to throttle all the time.
Turn 1 it helps settle the front - makes it more poise under hard brakes. Gives confidence to take turn 1 upper 90'smph.
Prior to tpc unit i was lapping 157's. i'm sure if i give it a full max attack mode i can extract all its juice out of it but i stopped going for lap times and enjoying myself.
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Joined: Aug 2013
Posts: 48
Likes: 0
From: Granite Bay, CA
Hi Henry. Glad your tpc unit is okay - I helped you install yours after that one shop would not help
Their is one listed FS in the parts sections at a discount price atm. Contact me directly if you dont see it and i can put you in touch w the owner. He just went cup car route.
That said, the transitions are a lot smoother with tpc unit. Turn 2-6 is were you really feel it working for you. Again going through the fast sweeper 8. Really helps getting close to throttle all the time.
Turn 1 it helps settle the front - makes it more poise under hard brakes. Gives confidence to take turn 1 upper 90'smph.
Prior to tpc unit i was lapping 157's. i'm sure if i give it a full max attack mode i can extract all its juice out of it but i stopped going for lap times and enjoying myself.
Their is one listed FS in the parts sections at a discount price atm. Contact me directly if you dont see it and i can put you in touch w the owner. He just went cup car route.
That said, the transitions are a lot smoother with tpc unit. Turn 2-6 is were you really feel it working for you. Again going through the fast sweeper 8. Really helps getting close to throttle all the time.
Turn 1 it helps settle the front - makes it more poise under hard brakes. Gives confidence to take turn 1 upper 90'smph.
Prior to tpc unit i was lapping 157's. i'm sure if i give it a full max attack mode i can extract all its juice out of it but i stopped going for lap times and enjoying myself.
1:57's in a stock 997.1 is impressive!!
Rennlist Member
Joined: Feb 2009
Posts: 1,368
Likes: 245
From: Tampa, FL
Anyone have this installed with a monoball suspension?
I was planning on taking out the monoballs and putting back the stock bushings, but if this can make it somewhat bearable on the street, that would be awesome...
I was planning on taking out the monoballs and putting back the stock bushings, but if this can make it somewhat bearable on the street, that would be awesome...
Pro
Joined: Dec 2006
Posts: 567
Likes: 1
From: Bay area, California
I agree with you that I was able to pick up time from 1 to 6, especially 2 and 3, where I used to lose pace to other cars. I was also more confident at using full throttle at 7 and use more throttle at 8.