Looking for input regarding electric fuel pump choice

[Mike D]

Trying to decide which type of fuel pump to replace the OEM on my '85 500SEL which was converted to MegaSquirt. I'm using 19LB. injectors from a standard Ford 5.0L, a custom fuel rail and an aftermarket fuel regulator.

It was running fine with the original unit but the pump is wearing/worn out. Still puts out the pressure but has developed a bad spot on the armature or worn out brushes. Upon occasion it needs a bit of a "rap" on the pump to get it spinning. Not a problem to me as I keep a small rubber mallet in the trunk but I doubt the Missus would enjoy crawling under the beast for the required action. She's funny that way. I'd imagine if she had to do it then the next place she'd use the mallet would be in my cranial area. She's not a fan of cars which have "quirks".

There seems to be three types available which will fit. The "rolling cam", the "gerotor" and the "turbine".

It's been awhile since I've had one apart but it seems to me the OEM is the "rolling cam" type which has vanes which drive the fuel.

The "gerotor" type seems to deliver the most/highest fuel but requires the highest voltage/amperage. Up to 15 amps depending on manufacturer/model.

The "turbine" is the newest on the market. It has the advantage of the lowest current draw with what seems to be a comparable fuel delivery between the other two types.

They are in the same ball park regarding price and all are Bosch units.

Anybody have any experience with the different types? Opinions regarding their advantages/short comings?