With a water/meth system such as a Snow stage 2 , is it run "on" all the time or just when towing and givn 'er ? Don't tow heavy , but with my ID tow file , if I try to run over 60mph , I'll see 1200+ easy. I have a VGT-ss , tuned ficm, DDP 90's , fass95, Airraid , Banks bonnet and tubes ...