Can anyone explain the pump sizer loop circuit for me? I understand it will allow me to get rid of a little fuel but trying to wrap my head around how the jet size works in conjunction with the main pill size. Is the sizer loop the same thing as a hi speed mechanical lean out with just a lower PSI setting on the poppet? We just upgraded the blower and Injector and added a riser on our setup with Hammer, the additional boost from where we were at looks like we will run out of pump as it would stick us around a .065 pill on are average day of 1500"DA. The old pump is a 990 @15.5 and now Rage suggested going to a pump at 18gpm but he says we will need to add the sizer loop to get rid of a little fuel.