raising the acis to 4500rpm-5000rpm would be a larger benefit, to see what it would be like for it to kick in there, drive down the road, in say 3rd gear... 2nd whatever... get the engine to wherever u want it to activate at then Nail it, the higher the rpm the harder it'll kick in.... But a good way to know how high u should raise it is watch how low your rpms go after u shift from the redline.... u want the activation before where your rpms drop to so your always in Short Runner mode for High Rpm Power. when it activates it opens the valve to activate the Short Runner mode, before the kick in the valve is closed to make Long Runner mode for Torque at low rpm.... Long runners for torque and short for high rpm mode.
