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Originally Posted by fa1
What about the one in the k20a3 where only 12 valves are open below some certain rpm. That's another kind also I think.
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its really just a sub-type. I'm sure over time, each major type of i-VTEC will have a subtype for efficiency or for performance. But, its the basic premise of what the i-VTEC does...for DOHC 4-cyl engines, it does the same...VTEC+VTC for intake/exhaust.