Classic cars forum & vehicle restoration.

[Ray White]

Perhaps someone could explain what is going on here and how it is wired?

This XPAG engine is being supplied with two petrol pumps and two coils. Seemingly two condensers are needed as well?

[DM]

The second coil is not wired, it is in place as a spare allowing the wires to be quickly swapped over.
Can’t see the wires and pipes on the second pump but expect it is a spare as well.

[Ray White]

[Ray White]

It looks like the low tension of the two coils are connected (via two condensers) somehow.

The two pumps are also in tandem.


Worth doing? or overkill?

[Rick]

Maybe used for long-distance rallies?

RJ
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[Ray White]

[Peter_L]

Personally, I don't see anything more than installed redundancy with a very simple changeover system. The unused coil has no electrical connection.

[alastairq]

It seems typical of a vehicle used on events focussed on 'reliability' [such as , classic reliability trials?] where the first objective is to 'finish'...regardless of one's performances during the event.

Motor sporting events such as the one I mentioned above do not permit backup support, such as a convoy of vans and posh gazebos to service, maintain & repair competing vehicles.
In fact, aside from the friendly co-competitors help, one is very much on one's own.
Hence, to enhance the ability to finish, all weak points which prevent onward motion are duplicated...preferably sited to avoid spending too much time conked out.
In the above mentioned type of events, competitors often carry a spare differential or two in the back...possibly the odd replacement alternator [engines can be bump started].....and duplicated ignition & fuel components..

Throttle cables duplicated, etc etc....
Nowt worse than knowing one can fix it and get going again...if only one had that simple, easy to carry component.
[Often a fellow competitor can help one out, but don't bank on it.]
I believe these posh classic rallies operate on a similar principle, but cost one heck of a lot more.
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Dellow Mk2, 1951 built, reg 1952.
Fiat 126 BIS
Cannon special [1996 registered. Built in 1950's]
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Ford Pop chassis, Ashley 1172 bodyshell, in pieces.

[Ray White]

What I see is a wire connected to the lower post of the top coil that joins the lower post of the bottom coil. It seems to be connected to two condensers.

The petrol pumps are plumbed together but I can't confirm their electrical connection.

[Peter_L]

To utilise Coil 2, move the LT cable and HT Cable. Ignore the capacitor, only one is in circuit.

SU Pumps. The male spade connector on the one nearest the camera has no cable, part of the spade is visible.

It is all what it is, there is nothing other than redundancy and easy change over.
I had a Mini with which we did considerable long distance trips across West and East Europe then a much modified Cortina Estate that did similar and North Africa. Multiple redundancy and spares were order of the day. Example: The Mini also had three petrol pumps. Two connected to the two isolated fuel tanks, installed as per the Mini Cooper and a none connected spare.

[ukdave2002]

In this set up there won't be a reliability improvement ; if either the coil or pump fail, it still involves stopping, opening the bonnet and swapping a wire.

To change a coil or fuel pump (with the spare unit in the boot) is a 5-10 min job, so the only benefit in having them fitted this way is where speed is important, as Alastair comments its probably originally from a competitive set up where 5 mins time saved could be critical.

For authenticity they could loose the modern blue B&Q plastic crimp on the fuel pump!!

Dave

[Ray White]

[lowdrag]

C-types always had two coils, ready for a swap if one failed:-

[peter scott]

[Ray White]