Quote:
Originally Posted by hector
it would seem so since it is contrasted in the sentence to a"high pressure" application. a high pressure N54 from the factory would be great particularly if they can engineer out excessive turbo-lag- maybe the cascade/vnt will accomplish that but i'm wondering how such an engine producing lets say 330-350hp and similar torque would be subordinated to the S54 derived M1 engine??
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But if that is the case then doesn't cascade charging sound more like the traditional sequential turbo? This would certainly take care of boost threshold issue, although as long as they use a big turbo (or two small ones for that matter) for high RPM, throttle resonse will never be instantaneous.
As far as I understand, VNT is the same as variable geometry turbo, in which case I don't think the price of such engine can come down to 3-series level anytime soon. The only petrol car that uses this is the 997 turbo. And if BMW does use this technology, it will be one of the most advanced engines that have, and will be very unlikely to be positioned below anything but the most outrageous NA engines.
I guess the confusion comes from the term cascade charging, which I've never heard of. Hector, do you have a link that connects this term to VNT?