SC V6 wrote:VVti is similar to Vtec, and the problem with that is that at higher RPM's the camshafts slide over and make the duration for exhaust and intake greater... they overlap a bit which is what causes the delima for boosting a Vtec or VVTi... the overlaping of the intake and exhaust duration makes it damn near impossible to hold any boost in the cylinder
In fact VVT-i is different from VTEC...VTEC control both exhaust and intake valve..VVT-i only intake valve. VTEC is engaged only at a specific RPM...VVT-i is permanently engaged and verify if you ask for power or for fuel economy.
VTEC-i and double VVT-i (like in 2GR-FSE) are the only "identical" system that Honda and Toyota are "sharing"
If I'm wrong just ell me cuz I read a lot about it...I just want to learn what is version.
