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Originally Posted by 454Casull
Thanks for clearing that up, SaabJohan. I have a question, then; if a continuously-variable-lift valve actuation assistance mechanism is installed so that the lift is ideal for all RPM, is intake timing/duration a very big factor (in the production of torque at any given RPM)?
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Is your question "if we can control lift, then do we need to worry about timing?"
If that's what you're asking, then the smart-alec answer is "no, just use zero lift for the times when you'd like to have the valve closed."
Barring the smart-alec response, then yes, intake and exhaust timing are still important. Overlap period is probably the most critical factor to look at (EVC-IVO), but EVO and IVC are important as well.
To be honest, if I had to choose between two systems that worked equally well mechanically, where one allowed me to control valve timing, and the other allowed me to control valve lift, I'd choose the valve timing mechanism every time.