canuck

I want to raise the VTEC crossover on my b16 with the use of my VAFCII. When i did the swap i chipped a p28 but they set the vtec crossover to 4800rpm. In my opinion that is way too low.
Now, since the ecu is chipped and i am raising the vtec crossover [V/T Cont] via the VAFC do i need to set the fuel correction at VTEC unmatch [V/T Unmt] to anything.
I figured if anything it would probably be a (-) number b/c the ecu would think vtec has crossed over at 4800rpm, while really i would change it to 5200-5500rpm, so it would be sending enough fuel vtec but really it wouldn't have crossed over yet.
If i left the [V/T Unmt] at 0% would i be running too rich and be hurting performance more than just having the ecu crossover vtec at 4800rpm?
I know its kinda stupid to have a chipped ecu and a vafc but it was a present, so i figured i could use it to lower vtec x-over.