just set the vtec changeover to 4700rpm and set your fuel settings to aroun -5% bottom and top end, and taper it up to -2%for midrange and leave it at 0 at 4700rpm....it will help gas mileag a bit, won't hurt anything and a leaner mixture makes more power....but really, it's not enough of a change to make a big difference....and yes, changing the vtec changeover point is helpful..it's too high in stock form....power is already falling off when it changes over.....and the h22a's run too rich anyway