Mounting a Facet style pump in the same location as an SU original electric pump

[gs.davies]

Has anyone done this before? Was wondering if there’s any tips on making this as simple as possible, ideally using the original pump bracketry or mounting holes?

[johnv]

I've done it but I kind of wish I hadn't as its too noisy and clacks constantly when the ignition is on. It's on my list to replace it with an SU sometime.

[Fanfaniracing]

I have done it and it works superbly for me. I used the barrel type Facet pump: http://minispares.com/product/Classic/F ... o%20search

I used the existing holes and made a little bracket. Needs to be powdercoated:

IMG_4273.jpeg

IMG_4274.jpeg

I have to add that i use two Webers with a Filter King Fuel Filter/Regulator in the front wich is set to the correct Pressure for the Carbs...

[Polarsilver]

What concerns me with the Facet Pump is with the Float Chambers "full" after being primed when you turn on ignition ..In this situation the Facet Pump seems to keep on pumping?..( not like the SU Pump that stops pumping when float chambers are full with the ign; on) .. i assume the Float Chamber Needle Valve is the only fuel delivery stop when using a Facet Pump when the engine is Not running & Ign; Is On ?

[johnv]

What concerns me with the Facet Pump is with the Float Chambers "full" after being primed when you turn on ignition ..In this situation the Facet Pump seems to keep on pumping?..( not like the SU Pump that stops pumping when float chambers are full with the ign; on) .. i assume the Float Chamber Needle Valve is the only fuel delivery stop when using a Facet Pump when the engine is Not running & Ign; Is On ?

Yes. I was continually having problems with leaking floats chamber even though everything is new, until I fitted Burlen's new anti-leak floats. Everything is fine now, but I'm still going to change it. I have the little square solid state one, which is a lot noisier than the round one I think.

https://sucarb.co.uk/float-chambers-spa ... valve.html

[Exminiman]

I would watch the pressure as well, may well need a regulator for an SU

[whistler]

I use these Ecco pumps (made in New Zealand) on both our minis. Same characteristics as the SU. It only ticks when fuel is being pumped, unlike the facet pump.
Comes complete with fixing bracket and goes on rear subframe.
https://simonbbc.com/fuel-flow-su-repla ... tallation/

[atm92484]

What concerns me with the Facet Pump is with the Float Chambers "full" after being primed when you turn on ignition ..In this situation the Facet Pump seems to keep on pumping?

Facet pump selection is very critical to prevent this. I forget the number of the cube pump I've used on several Sprites but it only outputs 1-2 psi. It works fine with SUs but there are other parts numbers that appear to be the same but they output too much pressure.

[EAVB]

I use these Ecco pumps (made in New Zealand) on both our minis. Same characteristics as the SU. It only ticks when fuel is being pumped, unlike the facet pump.
Comes complete with fixing bracket and goes on rear subframe.
https://simonbbc.com/fuel-flow-su-repla ... tallation/

I have the same pump, can't fault it, no float chamber leaks (I had these with my Facet).

[whistler]

I use these Ecco pumps (made in New Zealand) on both our minis. Same characteristics as the SU. It only ticks when fuel is being pumped, unlike the facet pump.
Comes complete with fixing bracket and goes on rear subframe.
https://simonbbc.com/fuel-flow-su-repla ... tallation/

I have the same pump, can't fault it, no float chamber leaks (I had these with my Facet).

I've read posts of guys who've had these Ecco pumps for over 20 years with no problems, mostly on MGB's.

[twc641]

I'm using a Facet 40104 1.5-4psi ,pump works fine with my 2 HS2 carbs on my 63 Austin Mini
As far as being a bit noisy at start up it all goes away once the engine is running!!!!!!!!!

[Peter Laidler]

I've been reading this thread with a bit of interest regarding the pressure. An SU float chamber can only leak/overflow (down onto the exhaust.....) when the incoming FUEL pressure exceeds the pressure limit of the float activated needle valve. (think toilet cistern float and lever). Unlike your toilet cistern, there's not a lot of leverage to hold the needle up. So even a tiny bit more load/pressure that it can sustain WILL cause it to unseat. That excess fuel will eventually by-pass the valve and vent through a little hole that's hidden underneath a shaped piece of aluminium wrapped around the intake.

Have a little look......, it's just below the brass intake pipe. Yep...., that's the one, just above the exhaust.

If you are using SU carbs, then the pressure of any pump output should be just below that of the stop-valve pressure in the fuel bowls . Just like your toilet cistern at home.

You could most reasonably say that this is a good case of '.....if it ain't broke, then don't fix it.....'

[gs.davies]

I've been reading this thread with a bit of interest regarding the pressure. An SU float chamber can only leak/overflow (down onto the exhaust.....) when the incoming FUEL pressure exceeds the pressure limit of the float activated needle valve. (think toilet cistern float and lever). Unlike your toilet cistern, there's not a lot of leverage to hold the needle up. So even a tiny bit more load/pressure that it can sustain WILL cause it to unseat. That excess fuel will eventually by-pass the valve and vent through a little hole that's hidden underneath a shaped piece of aluminium wrapped around the intake.

Have a little look......, it's just below the brass intake pipe. Yep...., that's the one, just above the exhaust.

If you are using SU carbs, then the pressure of any pump output should be just below that of the stop-valve pressure in the fuel bowls . Just like your toilet cistern at home.

You could most reasonably say that this is a good case of '.....if it ain't broke, then don't fix it.....'

It is broke. There’s only so much battering of fuel pumps I can withstand.

[gs.davies]

I'm using a Facet 40104 1.5-4psi ,pump works fine with my 2 HS2 carbs on my 63 Austin Mini
As far as being a bit noisy at start up it all goes away once the engine is running!!!!!!!!!

That’s a nice installation. Did you use the isolating bobbins or is this all solid mounted?

[twc641]

I just used a solid 1/2x1/2 strip of rubber ,as i had not received my bobbins(insulators) at the time of installation ,the solid rubber works well though! amazon had the insulators set of 4 for $9.00
4pcs 25 x 25mm Rubber Mounts Rubber Vibration Isolator Mounts Shock Absorber with M6 x 19mm Studs Vibration Isolators
I will probably install them at a later time
Cheers
John