Quote:
Originally Posted by SkullWorks
NOW throttle bodies are becoming obsolete in the wake of cams that are so variable in lift duration and LSA that they are throttle controlled and the TB is only used for IDLE air control and engine deceleration...BMW, Nissan, Toyota, not to mention Ferrari, have variable height and duration systems (i'm sure there are others these are the only ones i've looked at enough to know for sure what is going on as far as valve event)
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True, but cost/reliability will delay the adoption of these systems in favor of easier ways to improve economy. Toyota didn't want to use variable lift on the LFA for example.