Lolol, you have a good point there.
![Big Grin :D :D](/styles/default/xenforo/vbSmilies/Normal/biggrin.gif)
An answer would have helped, wouldn't it.
![RedFace :o :o](/styles/default/xenforo/vbSmilies/Normal/redface.gif)
If by triptronic you mean it is a normal automatic with a torque converter then yes it will not be as accurate as could be due to the losses within the converter the dyno cannot account for. There are functions on the dyno which I never use that somehow calculates these losses. If you want to be the guinea pig (as long as it isn't turbo charged) I'm quite happy to have a play about with it.
![Big Grin :D :D](/styles/default/xenforo/vbSmilies/Normal/biggrin.gif)
I can quote you words from the manual on the subject later if you like (still in bed at the moment).
Either way, it'll be no more or less accurate than any other automatic that uses the same design.
If it's an auto that has electronic clutch plates doing all the work, I can run it as a manual car and you can ignore all the above.