OK, so I tried to Dyno my Supercharged car today, but we had some problems. First off, has anyone with a Tiptronic dyno'd their car and if so how?

I brought it to the Dyno place, hooked it up and ran it. The results were terrible. It seems that with a Tiptronic there is a built in torque converter? Something was happening that did not allow my car to show it's full power. In fact the Dyno result came in lower than a stock C2 would have. I guess the car senses the front tires not moving and cuts some of the power for safety reasons?

I do not have PSM so that wasn't the issue. Does anyone know how to Dyno a Tip?

 

No no and no. Tiptronics HATE the dyno... One front diff later and crappy dyno experiences I gave up The tip just aint meant to be dyno'd....

 

If you don't have PSM, what else in a 996 is doing the sensing and cutting?

 

Wouldn't the EVO guys know?
I'm sure must have dyno'd a tip before.

 

This is from Loren at Renntech.org...

Here is an excerpt from a TT TSB on dynos:

If the vehicle is run on a two-wheel roller dynamometer, sufficient inner-cooling cannot be ensured. As a result, boost air temperatures reach excessive values. This will lead to loss of engine power and damage to the engine due to overheating.
The considerable amount of heat generated may damage the transmission. The significant amount of slip at the wheels caused by the high power output may lead to incorrect output measurements and damage the tires.
Note: Tire damage may not be immediately recognizable.

http://www.renntech.org/forums/index...topic=2894&hl=

 

That's nasty.

 

wouldnt that apply ONLY to TT cars...? Also, you have a C2, not C4, and I "think" that the speedo/odometer is routed thru the tranny, not the front tires, so the ECU doesnt actually know whats goin on from front to rear.....

 

nope that torque converter says "screw this" on a dyno...