Quote:
Originally Posted by red-sauerkraut
Get this... I was told this yesterday by a close friend of mine, returning from a trip to the BMW plant in Munich, that a new high revving 4 cylinder in development may have 3 Turbos.
|
They have been "playing" with a tri-turbo diesel and petrol, and no offense to your friend they will not tell you this on a factory tour.... the people giving the tour have less knowledge of what goes on behind the scenes than most people on this forum.
If your friend had a behind the scenes tour, that is a different story.
BMW is trying to get the most power and efficiency out of the least fuel, so anything is fair game.
A tri-turbo makes sense as one can supply the engine with air at higher RPMS- in gas to keep it going and diesel to raise the red line.
The big down fall is expense and weight.
BMW eliminated a turbo on the N54 to create the N55 to save money without losing performance, so the idea of the 3 turbos has always left me a bit puzzled in the grand scheme.
A turbo and super charger (with a electromechanical clutch) makes more sense to me from a cost and design concept.
-M