MPi fuel pump upgrade

Started by MtyMous, July 24, 2022, 12:00:18 PM

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MtyMous

So I'm installing an MPi fuel tank and in-tank pump setup on Tink. Flow rates and pressures all seem to be right for theninjection setup I'll be running, so I figured I should bench test it.

Here are some figures for yall when considering wiring and controllers for fuel.

Brand new pump pulled 5.5amps (@13.8v) peak on startup and full clog condition. I mechanically plugged the line to only let a small amount of fuel through to simulate a line blockage but not completely blocked to cause cavitation or an artificially low reading.

Nominal operation was 3.0-3.2amps (@13.8v) pumping a full tank on a recirculating loop. Small restriction added to simulate pressure regulator and in-line filter. Your amps will be lower if you run less restrictions.

Dry pump when out of fuel pulled 2.2amps (@13.8v) and was steady at that reading for 5 seconds. Stopped to prevent pump damage.

I'll be operating this on a fuel pump controller with a 7amp max. It allows for a 3 second prime then shuts off until it receives a signal from the tach. This prevents pump burnout and unnecessary loss when not running. The controller also turns the pump off if tach signal is lost in event of accident, engine shutoff from fuel starvation, etc.

Any other specs y'all  are curious about before I pop it all in the car, let me know.

94touring

What injection setup are you going with?

MiniDave

What fuel pressure and flow volume are you getting with that pump?
Complete failure at retirement

1989 Cooper Racing Green
2009 Clubman S
2014 Audi Allroad

MtyMous

I can't measure pressure right now, but the MPi was rated at 3bar at the rail I believe, so it should be more than adequate for that. I'm sure it over performs that number, but I'll be regulating it down to 3.5bar as recommended by Specialist Components for their 5 port Fuel Injection kit

I was able to get flow measurements. I measured the flow for 30 seconds 3 times at an unrestricted flow from one container to another and measured the output. 1800ml, 1775ml, 1800ml on all 3 tests. Average of 1792ml.

Change to 60 seconds for 3584ml/minute or 3.58 Liters/minute or 0.95US Gallons/Minute

So, accounting for my not so scientific test bench setup, I'd say it flows 1 Gal per minute at full flow rate.

MiniDave

Way more than that tiny engine will ever need!
Complete failure at retirement

1989 Cooper Racing Green
2009 Clubman S
2014 Audi Allroad

MtyMous

Dan, I'm using the SC 5 Port injection kit with some small modifications for the other things I want to run on the car and gauges for IAT etc. But for the most part, it's the 5 Port kit and ECU from them.

tmsmini

#6
I suspect it will be fine.
At one time I had a specification sheet for the Rover WFX100810 pump which crossed over to a VDO/Bosch pump. I found the specs on an Australian Bosch site. I can't find it now though.

One guy on the UK Mini Forum says he is using it with an engine that has 150 HP plus.

I found the part numbers, but not the specs.
VDO   X10-736-002-009
DELPHI   FE20031-12B1

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