AP Fuel pump

[Geoff Dowdle]

Peter & Graham ,
further comments
1. you need one paper filter between the pump & the rear carb ,not two on the suction side , this could be a part of the problem with the pump having to suck through two filters that could be partially blocked.
2. An Electric pump at the rear will push the fuel through the original AC pump , my AC Ace Bristol was set up like that .
2. I agree Graham a pressure regulator might be needed at 4.5 psi or the needle & seat could flood the carbs .
More Problems ,Polarity another problem .

3.I'd buy a low pressure SU pump as a temporary fix (even a used one )which will give 2 - 3psi for the wedding then fix the AC Pump , as I have mentioned before they are a very simple forgiving design .
Geoff

[peterg]

I am loath to put a filter between the pump and carb as it is the original solid copper pipe.

The casting number on the lever is 822N3 (or the N could be 8).

Incidentally both filters are new. Location of the cam is an interesting issue that I haven't considered before. The polarity isn't an issue as it has been rewired negative earth.

[Geoff Dowdle]

Peter,
you might have the wrong pump lever fitted.
The two original pumps I have are fitted with levers of casting number "1524280"

The Standard Vanguard pump I have uses 1524043 which is quite different .

I've attached a photo of the pump lever and sketch which shows the angle between the working surface on the cam and the machined surface between the locating tit of the spring and the pivot point hole of the lever is approx. 60 degrees .

http://www.bristolcars.info/forums/a...1&d=1397080785

If you have the wrong lever I doubt that it will work except at idle .

Geoff

[flyinghorse1]

This is the fuel pump from the Bristol manual (400) its a UG as previously indicated. I assume you have both springs.

[flyinghorse1]

Peter-Did you all get to the church on time?

Graham