nice car mate.
what spec is she 96 or 98?
and as you mentioned you have the spoon "ecu" and vtec kicked at 4300 rpm, actually as far as i know on spoon ecu V-Tec Point 5,100`5,400 and the Rev. Limit 9,000 ,so you must have other mods to your car if she is going all the way to 9300 rpm or else the needled must be moving Quicker.:homer:
Vtec profile only works with high RPM! so lowering the vtec You will lose so much low down torque and power when you shift the vtec that low.
and lads vtec defiantly should be left as Honda sets them as few of ya stated above. or if you do want vtec to kick in earlier you must make few changes to Ignition timing and fuel mapping needs precision dyno tuning. Simply telling your ecu to engage vtec at a lower RPM without ignition and fuel system modification actually causes you to run LEAN, not RICH, thus GREATLY increasing the RISK of "detonation." No offense,
However vtec is not meant to add alot of power, it just adds top end grunt for just that little bit more to give a nicer pull, Honda manufactured vtec to be up there so that it IS NOT used on every shift.
Vtec essentially changes the duration of the lifters of intake and exhaust. Proportionally to the duration that a lifter is open on the intake/exhaust side... more flow or more air/charge more air means for fuel can be consumed, more consumed fuel means more powa!!!