MSefi.com read only forum (Jan.15,2018)

My Merkur used a resistor wire on the ground side to reduce the delivery rate of the supply pump. I want to use a high pressure pump as a supply pump on my swirl pot system (because I have one).

I have an ignition ballast resistor to use, it is a beefy heat sinked unit. Should I wire it on the ground side, or the 12v side of the pump, or does it matter?

It shouldnt matter which side the resistor is on. If it was on the ground side and it overheated and shorted to the chassis at least it would still run (at full power). If that happened on the + side it would be a bit more messy.

Are you sure the pump you are using is rated to run at the voltage that would result with a resistor? Or are you trying to run the factory pump? You should also do the math and make sure the ballast resistor has a high enough continuous current rating to run a fuel pump, some of those things draw quite a bit of power.

What did you use for a swirl pot?

Thanks for the reply. I found a resistance value for the old resistance wire, and I'm going to source up a length of suitable resistance wire to duplicate it on my new install. The ballast resistor was too much. In the meantime, I'm going to run it full bore. I just want to cut down the heat and pressure a tad.

I used a GE whole house water filter as a surge tank. I got the idea from a Mustang guy. Details are on my webpages.

Jim