I am not sure what Honda considers the "normal" vtec motor. Maybe its the design that opens the second set of intake valves at 2500 rpms? They have had quite a few series of operations.
Typically dual valve timing technology is something new for economy vehicles with both intake and exhaust has adjustments made during the power band. Im guessing in this case dual vtec doenst mean that, but its still on the intake cam switching from 1 valve to 2, then to another lobe.
Toyota recently went to dual vvt on the scion xd when it was released as well as the carolla and a few other vehicles from that model year. Same with honda.
Of course honda has added VCM, the ability to switch cylinders off and on. Previously they were limiting valve openings like on the gen 2 insight. It either leaves the valves in neutral or close, opens them fully or opens they partly depending on mode and its both intake and exhaust. Some say the "vtec" lobe is flat.
Id like to take it to a machine shop and get it reground to an economy ground, ported, polished and milled for a higher cr.
Here is what I was talking about with the piston upskirting oil jet.
