I've tried searching for this, but I'm not sure how to word it...
I found some rebuilt Gast 1/2hp rotary vane vacuum pumps locally for 120 bucks each. These pull high vacuum but only about 6cfm @10"hg. What I'm wondering is what would happen if I used one of these pumps in combination with something like one of the Ametek vacuum pump/blower motors? Gast pump pulls high vacuum and the other motor makes up for the flow. This makes sense in my head but I'I really have no background in any of this to know if it would actually work. I'm kindof assuming for some reason that it wouldn't work, or I would have found other people trying this by now.