So last night I took my tt out for a quick run on the 1/4 track. I tried to convince myself not to launch the car hard because whenever I've done this I smell the clutch smoking. So anyway I click off 13.0@111.

The time slip looks like this
2.2 60
5.7 330
8.6 1/8@86
11 1000
13@111

It seemed like I came out of the hole hard and the power just kinda dropped off, later on the street I tested it again and it was fine. I didn't get a chance to look at the bar on the track but off the track I hit 1.0 in 3rd and 4th. I've been drag races for about 4 years and those times match what my 996 n/a with exhaust did. It almost felt like the traction control was kicking in and slowing the car. Any ideas?

 

I would turn the TC off for a drag run myself.

 

I just red the manual, I guess I didn't realize the the psm will reduced power.

 

PSM will kill your ET and Trapspeed, I've forgotten to take it off on my Stage 4 TT and ran a 12.6 then come right back and run with it off and ripped an 11.8.

 

Do you remember what the difference was in your trap speed?

 

it cost me 4-6 mph

 

TC will pull timing significantly generating the differences that others have already noted. Depends on how you try to launch I have seen as much as 10 mph.

 

Just thinking outloud here...but you sure you didn't bog on the launch? It's usually pretty sticky out there and I would think PSM would kick in if you had wheel spin so am wondering if it just actually hooked up with your conservative launch and bogged a bit.

 

I have an 02 TT with the X50 and tip trans how does the PMS affect the take off? My car seems to take off hard if I just take off with about 1/4 throttle. When I floor it with or without the PMS it takes off slow then after about 30-50 ft it it will flat out roll. Don't mean to hijack a thread but how do you get the most out of a car like mine; I am new to Porsche?

 

No insult intended here, but a 2.2 60' isn't "coming out of the hole hard". Get that into the 1.7's and you will see a nice drop in your ET.

 

Definatly take the psm off!

 

No bog on launch

 

Exactly the psm was on. It prevented a good 60 ft and cut back my good launch.