Mihnea

It would be a better idea but Audi just didn't do it at that time unfortunately, otherwise maybe they wouldn't have dropped the project...

But don't forget that at that time, doing a proper boost management for 2 sequential turbos was a real nightmare for Bosch's and Audi's top notch engineers, right now it sounds kind of easy (although....) but I guess it's also the reason why they didn't pursue with the project.

The other problem must have been the heat generated by 2 hot sides and also the room to fit them properly, though I might be wrong and they might have dropped the project for totally different reasons...

Cheers,

Mihnea

AKrlic

How much work goes into those super/turbo-charged hybrid set-ups? Each time I try to look it up on google, I find everything but what I'm looking for. The idea is appealing, as it would improve low/mid response, which would in turn would help a large turbo take over at the top-end. You could even employ one of those clutches on the supercharger pulley, which "turns off" the supercharger, such as the one Mercedes Benz uses.. [only, for this application, the s/c would "turn off" when exceeding a pre-set RPM or boost level or something].

I could only imagine that this sort of endeavor would cost tens of thousands of dollars in engineering, production and tuning. But it certainly is an interesting idea.

quattro90S6

Supras have twin turbo 6 cyls, have alwasys wondered how the hell works