I replaced the blower motor on my 75 280Z w/ a 02 honda civic motor as is an upgrade discussed on this forum. It feels like I am getting more air than before but far less than I had expected. Works fine , several speeds, quiet but not enough air flow for my liking. I have replaced all the duct hoses and have tight seals at joints. Wondering if perhaps the original wiring doesn't provide enough juice for the motor, I have an actuator door hanging open. or the duct work design won't let it happen??? I have an 98 Acura and on high it wants to blow me out of the car.