I race the car quite often in the summer and I talked to one of the tech's at the track today and he said if the battery is in the trunk then you need a shut off switch. No problem I said, he replied that many people put the switches in incorrectly. If you have an alternator, which I do, then the alternator must cutout when the switch is activated. How do you go about doing this? I always thought if the rpm was below 1000 (idle) the alternator wouldn't keep the motor running without some help from the battery?