Controlling fuel pumps with M800 and DHB

[DJDINO]

I have a M800 PNP and want to control 2 Deatschworks D350 pumps on an external surge tank, I'd like to run one slower at idle and then bring in the 2nd pump at a certain RPM, would this be possible with the Motec DHB ?

[stevesingo]

DHB has a total current of 20A, your pumps draw a minimum 11A each.

[DJDINO]

Thanks Steve, yes did read those specs afterwards. Would it be possible to control one pump (2nd pump) with the DHB or is it easier to just switch a relay via the ecu ? Not that keen on having 2 pumps running flat out all the time.

[stevieturbo]

I've been running a pair of 044's on mine for over 10 years.

Never a problem, and it keeps things simple.

I keep saying I'll get around to some PWM control for them....just never bother trying lol.

I will if I add a 3rd pump though

[DJDINO]

Thanks Steve, yes the KISS principle seems a good one