Originally Posted by AF
The NVH problem/reliability was probably solved in part by destroking the engine from 2.4 liters to 2.3 liters. Audi was forced to do that with their bi-turbo 2.7 liter V6 in the S4/A6 as it originally started out as a 2.8 liter V6. The increased cylinder wall strength adds durabiltiy and probably eliminates some of the NVH associated with a normal four cylinder. A four cylinder with forced induction tends to be even worse. Ever drive something with a 4G63? The "variable" turbo sounds pretty interesting though.
And way to be on AIM like, never.
I'm always on AIM, ass. The problem is I work 10 hours a day.
I have actually never driven a turbo'd vehicle. Variable geometry turbos have been around for many years but have only been recently implemented. It's cool stuff...many different ways to do it. Most turbodiesels for big rigs use them.