Quote:
Originally Posted by Exage
No not the K24Z7, the K20Z3. The K24 requires a light to tell you that it switched cams...
Not really. VTEC in the tradition sense is a cam-switching system. VVT is a cam-phasing system.
To put it very simply; VVT was widely adopted by the automotive industry. Engines produced today without a intelligent VVT system are stone age basically (I don't know if there are any). An intelligent VVT system is included with VTEC engines as current i-VTEC.
Most VTEC cam switching was not as widely adopted. Toyotas' 2ZZ-GE is the only Toyota engine to mimic the VTEC system with the single cam swap VVTL-i. Many manufactures are looking into variable that control valve lift variably rather than a cam switch. And many didn't even explore a cam switch system in it's prime.
|
I think you missed some of the systems that came out that weren't as widely used as Vtec, for instance the nissan NEO-VVL (Nissan Ecology Oriented Variable Valve Lift) Subaru had some dual pattern cam system that opened one valve before the other then locked both together...i-AVLS maybe.....I'm too lazy to look.
Did you know there was an 8 injector 1.6l four cylinder from nissan that was knocking on the door to 9K rpm and made 200 HP? they out Vtec'd honda bro
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)