Curious...how many racers run an alternator?

I run a slant six (low horse power compared to a V-8). Use a Denso 90 amp alternator. If my battery is low, I have seen a 300 rpm difference in idle rpm between having the field wires connected, or disconnected. So I use a micro switch on my throttle to open the alternator field at WOT. System charges normally at all times except at full throttle. The micro switch also activates the NOS system. I have twin electric fuel pumps, MSD 6a, electric fan and WP (Moroso belt drive style). NOS solenoides, Lights for night racing. I don't need to do anything between rounds, except go pee. Even the fan and WPO shut off automaticly, at 140 degrees.