Quote:
Originally Posted by swamp2
This has been a point of criticism all along concerning the throttle response desired in an M engine. However, direct injection will largely mitigate turbo lag, when the two are carefully integrated and matched by BMW M (boy I am sure glad Sticky isn't reading here...). Member enigma has rightfully pointed out that you can't beat physics and the rotational inertia of the turbo fans can not be made to disappear. However, DI cleverness WILL help significantly. Before a large throttle depression the DI system will be operating in a lean burn mode, thus the exhaust gas mass will be higher than that of a port injected engine turbo charged engine. The rpm of the fans can be maintained 2-3x higher! Yes not 50% higher 2-3x! This combined with a rapid shifting DCT transmission for super fast downshifts will go a long way to making the next gen M have very minimal turbo lag and something we will all likely want to drive.
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Imagine such an engine in combination with KERS. Turbo lag...what's that?
Best regards, south