Quote Originally Posted by jerry clayton View Post
I guess you could make up some rotors that actually had a skinnier center that allowed a largerdiameter lobe on the same center line gears, etc, but i think that the displaced volume is what passes thru the middle ---
Jerry, if you're saying air passes from atmosphere to the intake valve through the middle of the blower, then one of us is confused. I believe the air is moved from atmosphere around the inner diameter of the case, between the lobe and the case, but I could be wrong.