Audi LMP1 Discussion

[chernaudi]

Originally Posted by johnyardley

Hi,

I was listening to a youtube video of the new peugeot 908 hdi fap:

http://www.youtube.com/watch?v=446bW0Z2zSk


and it sounds like they are running waste gated turbos not vg.
Surely that would make for a narrower power band?

Best wishes

john

That's the old 908, the 2007-'10 car, which had conventional turbos. The Audi R18 for sure has VTG turbos or turbo (depending on who's sources you trust), and I don't think anyone's sure that the new 908 has VTGs or not--Audi proved that they can work on the R15, though reports of the Pug drivers saying that the R15s out accellerated them out of the corners at Sebring may support the thought that the new 908s might still have conventional turbos, or prove the theory that the open cars can out accellerate the closed cars that I've heard, which is just a theory.

VTG's don't have turbo lag, while normal wastegate turbos can if they're not set up right for a circuit or track conditions. That could be part of the reason for the old 908's wet weather handling issues (stiff springing, bad traction control, more of a peaky power band, and perhaps, turbo lag if in too high a gear).