Originally Posted by aus
I haven't read ths whole thread, but does it look like 2 air boxes on opposite sides of the engine? Possible electric supercharger?
Bottom line is, those S engines revved like an //M engine is suppose to rev. No N engine was close to 8,000 RPM, let alone 8,250. They were leaps and bounds better than the standard engine. You can tune an N54 to around 400wHP on pump gas now with bolt ons and a tune.
isn't the speculated engine tri-turbo, one of which is electric to minimize lag?