most of the kits recomend 43 or 45 or even 40psi because you are using a line off of you exsisting fuel system. I have herd you would have less problems with a lower psi. like if you are using a .026 jet which is around 30.5hp at 43psi your fuel jet would be a .014 which is so small it's hard to see light through if a piece of dirt gets in it some how it would clog. anyways i will call a few differnt nitrous vendors in the morning and let everyome know what they say.