Originally Posted By: Schmoe
Hasn't Honda been using something similar with the VTEC but adding another valve when VTEC is engaged? Didn't know that vvt was oil pressure activated.
i-VTEC is VTEC with VVT (cam phasing).
there is the VTEC-E, which on the regular economy cam profile, it shut off one of the intake valves per cylinder. The performance cam profile used all of the intake valves.