Fuel pump speed controller

[Olav]

What do they do....lowers the voltage so it goes slower. If, is it possible to lower the voltage and have a switch for low and hi mode? And what voltage? I think Aeromotive's is a bit high priced..... any other make?

http://www.cardomain.com/ride/2233875
www.texasgutten.net

[Andrew Starr]

Olav,

fuel pump controllers use a frequency to pulse the voltage to the pump. If you were to decrease the voltage instead, the amperage would increase and therefore burn out the motor, I would not consider doing that.

Weldon Pump makes a controller:
http://weldonracing.com/dialaflow.html

Although I have never used the dialaflow, if it is anything like the rest of there product line (which I am quite familiar with), it should be a pretty nice piece.

If you would like to call Weldon Pump (440-232-2282) ask for Jim Craig. He is the man when it comes to fuel systems and I am sure he will give you all the information you are looking for.

Andy

[Charley Lillard]

The Weldon controller does not work on all pumps so check with them on your application. It would not work on the Bosch pumps on the Mule.

[Olav]

I have a A1000 pump. Anyone know the cost/ price on the Weldon unit?

[Fuelie Fan]

Olav,

fuel pump controllers use a frequency to pulse the voltage to the pump. If you were to decrease the voltage instead, the amperage would increase and therefore burn out the motor, I would not consider doing that.

That is not correct. The resistance of the pump is fixed. Lowering the voltage does lower the supplied current. I = V/R

THe reason motor controllers use pwm instead of directly lowering the voltage is that it's both easier and more efficient that regulating voltage.

[DeltaT]

I use the Aeromotive pump controller to cut my pump speed (via pwm to take the duty cycle to 50%) in half under 2000rpm. It has helped my fuel heating problem. I got the unit used but in great shape for $140. New, they are like $279 which I'm not sure they are worth. They are pretty in the red billet case though, and they match the A1000.

Jim

[Olav]

Must look on e-bay try to find a used one or a new.....

[andrewb70]

I have heard that Walbro pumps do not like being slowed down. I can't comment on other pump designs.

Andrew