BMW are the only company that right now can afford to make such an engine (though like the K1300 engine I suspect Ricardo did most of the engineering). Expect it to appear in the next K-xxxx-LT and perhaps in something else. Also expect a monster price tag attached.
And it was about time somebody put out an inline six again!
Looking at the engine pic it appears to breathe through a single throttle body, not cool. Based on my experirence with a Rotax 1170 cc four-stroke triple used in some Ski-Doo snowmobile models, it makes for less than ideal low-speed response (response is somewhat sluggish until air velocity gets high enough through the large single venturi to liven things up). May be good for fuel economy (the reason given by Doo engineers for their choice) but it certainly doesn`t respond like individual throttle bodies.
Looking at the engine pic it appears to breathe through a single throttle body, not cool. Based on my experirence with a Rotax 1170 cc four-stroke triple used in some Ski-Doo snowmobile models, it makes for less than ideal low-speed response (response is somewhat sluggish until air velocity gets high enough through the large single venturi to liven things up). May be good for fuel economy (the reason given by Doo engineers for their choice) but it certainly doesn`t respond like individual throttle bodies.
This would explain why so many car motors have, and are, using single throttle bodies I guess
__________________
Steven
2008 Triumph Sprint ST
2001 Yamaha YZ426F
Motorcycling is not, of itself, inherently dangerous. It is, however, extremely unforgiving of inattention, ignorance, incompetence, or stupidity
Looking at the engine pic it appears to breathe through a single throttle body, not cool. Based on my experirence with a Rotax 1170 cc four-stroke triple used in some Ski-Doo snowmobile models, it makes for less than ideal low-speed response (response is somewhat sluggish until air velocity gets high enough through the large single venturi to liven things up). May be good for fuel economy (the reason given by Doo engineers for their choice) but it certainly doesn`t respond like individual throttle bodies.
It looks like the throttle is a single, but there appears to injectors right above the intake valves. If this is an engine that is intended for production, I have confidence BMW will have resolved these issues before selling one. There is probably some trickery we cannot see in the intake system.
Throttle body injection is virtually obsolete now with injectors being located in the ports for emissions purposes. As for the trickery, while I wish tehm well, there is a certain amount of physics involved and the need to have a single orifice large enough to feed six cylinders is bound to create air velocity problems at low speed (this is the essentially the same reason why two-valve designs were replaced with four-valve configurations, the two smaller intakes creating better airflow at low speeds and on initial lift). If they get around it by making the orifice smaller, then top-end suffers. While more economical to produce than having individual throttle bodies, it is a poor design for a high performance application.
think bmw get now money realize this bike.
initial the have to sale the S1000RR as good to bring a new bike like this.
first they will do the nex concept boxer (think you read about it) before everything else.
sorry hat my english didn`t become better
Throttle body injection is virtually obsolete now with injectors being located in the ports for emissions purposes. As for the trickery, while I wish tehm well, there is a certain amount of physics involved and the need to have a single orifice large enough to feed six cylinders is bound to create air velocity problems at low speed (this is the essentially the same reason why two-valve designs were replaced with four-valve configurations, the two smaller intakes creating better airflow at low speeds and on initial lift). If they get around it by making the orifice smaller, then top-end suffers. While more economical to produce than having individual throttle bodies, it is a poor design for a high performance application.
I always thought that four valves, with each valve being lighter, could be snapped open and closed easier than two large valves. Also easier to have compact head design without two valves the size of your palm, and instead four valves mounted around a central spark plug. Not really relevant to this dicsussion I guess though.
What if BMW has variable inlet cross-sectional area. At low engine speeds it "contracts" and at high speeds the area opens up. Just a thought.
I wonder what this BMW sounds like...
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