kevintari

Does anyone know for sure the hp/tq limitations of the tiptronic?

CMC

<ul><li><a href="https://www.audiworld.com/bbs/archive/9807x4/messages/474.shtml">Old post here on Audiworld w/ specs on the tip tranny</a></li></ul>

kevintari

What is the KO4 hp/tq rating at the tranny? Don't the numbers get watered down the farther down the drivetrain you go?

BigDog

only "output" from the engine). Of course, there are losses anytime you have moving parts to heat up and dissipate energy. And moving the actual internal parts takes energy (a function of friction), so yes, the losses increase as you increase the size and complexity of the system, all else equal. An auto tranny dissipates more energy because it converts more mechanical energy from the flywheel to heat energy. The torque converter is an inefficient way to transfer mechanical energy from the engine to the tranny gears compared to a clutch. But just like a clutch, you could probably replace the torque converter if you want to run more torque. It is very common to do with American muscle cars. Then the question is: how robust is the actual gearbox in the auto?

Perpetual Novice

It should be noted there are some here running a supercharged 2.8 through the auto and not having any trouble. The supercharged version is something like 290 HP.

I think Audi uses the 5HP24 (beefier than the 5HP19) in S4's I think, so it's clear that Audi and Zf don't think this is a good idea, but it has been done