n20 and timming

I highly reccomend a fuel psi safety shut off switch, plug it in the fuel supply and if it drops below 5psi wire it to shut down the nitrous noid. MSD also makes a dial operated timing controller that can be wired to work with the N2O, works well. The rule of thumb is 2* retarded per 50hp and you need to be sure you're tuning at the proper bottle and fuel psi or you'll be chasing your tail. A seperate fuel system is a great idea for spraying 150hp or more but most electric pumps will cope with a smaller shot of spray.