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Right, a lot of us have engines with variable valve systems - my xA has a VVTi 1.5L, which is essentially the same thing. The idea is to broaden the power band -- at lower RPM's fewer valves are actually better, and at higher RPM's more valves are used to improve power. So, the engine can have better efficiency at lower RPM's than it could w/o the VTEC.
All ecodriving techniques still apply.
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