bigjim
Guest
Depending on the size of drill the fan requirement to reach higher speeds is different between a 45' and a 33'. I think the 45' requires 15 gpm at 2600 psi and the 33' is 12 gpm at 1800 psi. These are different because the bigger the drill the wider the fan has to be. These numbers are very close but if you need I can get exact numbers for you.