Quote:
Originally Posted by RedAndy
On the Fit vtec is always on >= ~3400 rpms. Below that it may or may not be depending on throttle input and other factors.
BTW, unless I'm mistaken, the current gen Fits do NOT have variable valve timing at all (only 1 cam profile). This will be available in the the 09's. VTEC, as used in the 07 and 08 fits, refers to how many valves are opening - the valve timing/cam profile is not affected at all:
At low RPMS, only 1 intake valve/cylinder opens.
In VTEC/high rpms, both intake valves/cylinder open.
So at any given time, the engine is running with either 12 or 16 valves opening. I'm pretty sure that's it - no cam profile changes in the current engine.
I'm sure someone will let me know if I'm missing someting.  |
Reinforcement: (
The Truly Amazing Honda Fit/Jazz)
"If we look at this principle in relation to whether a VTEC mechanism is full 16valve 3-rocker arms or a 12v/16v 2 rocker system, then we can see that there is no physical law that dictates that one must be for power or the other must be for fuel economy. The 16v 3-rocker system adjusts valve
timing whereas the 12v/16v system actually adjusts valve
sizing."