Part number for mk1 LC fuel pump?

[MLI]

Would anyone on here know the AC Delco part number for a mk1 LC fuel pump?
Apparently, there should be a 3 digit number on/underneath the lower part of the pump, this number is supposed to be the last 3 digits in the AC Delco part number.

Also, I've read somewhere that the spring inside the pump is special to the Lotus Cortina/Elan, and colour coded blue, giving slightly lower pressure than on the standard Cortina (the Weber DCOEs require a lower fuel pressure than the single carbs used on standard Cortinas).

According to http://www.carburettorspecialists.com/CHLAUG2002015A.htm and their fuel pump list, the standard Anglia/Consul/Cortina fuel pump has AC part no 7950695, while there is also a later standard one with part no 7971280 / XP1280.

 

[Michael Winstock]

The subject of fuel pump pressures has come up several times before on this forum.
According to the official workshop manuals, the standard car has a fuel pressure of 1 - 2 psi and the Lotus has a pressure of 1.25 - 2.5 psi, albeit that the diaphragm spring test lengths and test pressures are identical as are the pump rocker spring test lengths and pressures.
Although the difference in the two fuel pressure ranges would appear to be very small in absolute terms, the difference in percentage terms is considerable.
Whilst none of the above answers the original question concerning fuel pump part numbers, it does suggest that perhaps the two pumps are not strictly interchangeable.

 

[David Baldock]

I have the number 8FO 695 stamped on the bottom of my original pump. It also has the number XP0695 LB stamped on a bracket which is secured by two of the bolts that secure the upper part of the body to the lower part.

I replaced the pump some twenty five years ago so the memory's a bit hazy now but I only have one spring & I seem to remember being told I would have to re use my original one.

According to the parts manual the pump is 'Lotus supply' & the spring, as a spare part, has it's own number which indicates it can operate with a standard pump.

Does anyone know what effect using a standard spring would have on the running of the car?

Dave B

 

[L2Man]

Webers love 3psi so lotus part is about right.

A standard pump of 1.2psi would lead to weber's taking forever to fill from cold and the associated poor starting and possibly displaying the effect of fuel starvation under spirited driving.

The opposite problem also occurs where electric pumps are added with a higher psi possibility without a regulator and the false assumption is made big carbs need as much pressure as possible to keep full.

This is then represented by over fuelling the plugs and then fuel being pushed out via the front vent holes or the valve underneath the carb, which is tough to see if the car has the standard airbox and in warm weather where the fuel will smell for a while and then quickly evaporate.

Risk of under bonnet fire would be a real issue.

so worth making sure the pressure is about right with an unobtrusive regulator??

ATB


Brendan