Nitrous works on bottle pressure to drive the N2O through the lines since there is no pump. So, increase pressure and you increase performance ... to a point. Optimal bottle pressure is 950 psi ... anything lower and you are not getting 100% performance that you could ... any higher and you will likely weaken fitting and cause possible damage to the solenoids. In the winter, the bottle pressure can drop drastically ... below 500 ... might as well not run the nitrous below 800 because it will turn a 75 shot into something more like a 30 shot.