There are alot of factors that will help with the speed on your airride system. The closer the valve is to the bag, the faster it will fill. The higher the pressure, the faster it will be. If you are running a bottle, helium is a lighter gas and will lift the vehicle twice as fast as nitrogen.The compressor is for system recovery. The higher the CFM rating, the faster will fill your tank. The higher percent duty cycle, the longer that it can run. And of course, you need to pay attention to the PSI rating. If it is a 150 PSI pump, you can expect problems if you are running at 180PSI! The compressor doesn't have anything to do with the speed of the vehicle lifting or lowering.