dust collector

ok if you have one dust collector hooked up to existing duct work, and get a draw of some degree. if you were to hook another identical motor and impellor setup to the same duct work threw a double wye and exhaust it out threw said bags or directly outside.. would you have more draw at the...

OK, I have a 3 H.P. Leeson motor hooked to a 11" impeller which works decent for some machines. The machine trhat it does not work on is the molder/planer(25"). T he impeller has a straigth blade that is cast alum. Was thinking of trying a larger impeller maybe a 13"(14"x 3-1/2" clearance in...