Which fuel pump with stromberg carby ??

[olmate]

I have been told today that my Landrover fuel pump does not pump at high enough pounds to allow the holden carby to function correctly; hence running out of fuel and poor performance at times. Aparently the Landy one pumps at 1 pound whilst the stromberg carby needs 5 -6 pounds.

It is true that I have previously had the problems where it seems to run out of fuel and backfire etc but I was wondering if others know this issye to be true.

If so - I spose I will have to fit an elec pump.

[Fusion]

Howdy Troy , I could be wrong ( happens a lot :D ) but i thought thats why people rejet the carby to suit .

[olmate]

Mick - I have an adjustable main jet and its set pretty well. The dyno bloke today was telling me that the carby needs more psi to run correctly (i.e. needle and float functioning as intended). Aparently the low psi wont necessarily be enough to move the needle and allow fuel in.

He lost me as I thought the fuel would get through anyway - as the Landy pump still pumps more fuel than my S2 can use. :confused:

[Bisho]

hey ol mate. not sure if this helps but, before i bought desmond, there were some fuel problems i think and so it was fitted with a weber carbie and an electric fuel pump, which works well. I do seem to be using a lot of fuel (for a series, i think!) which to me raises some questions, as ive heard of smaller main needles being fitted which reduce consumption, fumes and enhance performance ( i know series' are sluggish, but mine seems a bit over the top?). How did you go about your adjustable main jet?
I do have a stromberg in the shed, not sure if it was the original carbie or what, but electric fuel pump might be the way to go.

cheers

john

[olmate]

John,

The adjustable main jet has been on the carby for years but I always seem to be changing things as it never seems quite right. I am thinking that the std fuel pump doesn't delivery the pressures required and I may have to put on an elec pump (as per Mr Dyno's points). I have one - so there is no excuse.

What confuses me is that the pump delivers heaps of fuel and I would expect pressures to build up so the stromberg can operate well. But this may not be the case. I spose I should just stop thinking about it and put the elec pump on.

I shall see how I go.

[Bisho]

yeah maybe just fit it and bite the bullet!

[UncleHo]

G'day Olmate :)

That is a new one on me:confused: as over the years I have seen 100's of Holden Carbied Landrovers, and that is the first time that I have heard the fuel pressure bit,:confused: the best Holden Carby to use is the old grey motor one,48-63 years FX-FJ-FE-FC-FB-EK-EJ :) then rejet it to 51main jet the Landrover motor is 139 Cubic Inch and the Holden Grey is 138 CI so there is not a large volume difference, just the jetting between 4 and 6 cylinders.

The problem could well be in the fuel pump, as if the pump has excess wear in it, it may be not giving full stroke, or if the diaphragm repair kit has been fitted incorrectly it will only give a short stroke, if you have a workshop manual, you could replace the kit yourself,but take notice of the method of assembly, the AC fuel pump repair kit part No is 966VKT (Goss) or genuine No's 8G2039, R272069,AEW2760;) there is a Fuel Miser kit but I don't have the No. there is a small mesh filter in the top section of the fuel pump glass bowl and if that is dirty it will restrict the fuel delivery to the Carby:( or a piece of flake rust in the tank will intermittently block the fuel pick up pipe;) (common problem,drain tank,blow out with compressed air,strain fuel & reuse) also the Holden Stromberg BXU type carby has a small fuel bowl compared with Landrover Solex or Zenith, and will starve the motor in offroad situations, it is also subject to fuel vapourization from the exhaust manifold if run hard, or the re-routed fuel pipes to it will vapourise in the line from heat. BTW. float bowl level on a Holden carb is 5/8inch below top of bowl;)

cheers

[olmate]

Thanks for that UncleHo,

I have drained the fuel, blown out the lines and (you guessed it) I got a fair bit of crap with it. Thanks for the tip as I was wondering what was going on as the car had performed well enough in the past. I haven't looked at the level in the carby as yet but will do tomorrow night.

I will look into a carby off a grey motor as you have suggested and go from there at a later date. The car even sounds better now. You know, I would have thought that the dyno bloke would have checked the line for crap (maybe I am wrong) but I did specifically tell him that the car performs like it is running out of fuel. I could have done what he did (actually I did) as he only confirmed that my setting were right with all my mods and then advised me about the fuel pump. Anyway - all seems fine now. :D

[UncleHo]

G'day Olmate :)

Don't forget about the strainer gauze in the top part of the pump fuel bowl, it is standard fuel gauze, if it is full of----, then it will give you symtems of starving, it usually get a thin film of corrosion on it from either the tank crud or water that is in suspension, if you think there is water in the tank, tip in a cup full of Metho;) it puts the water in suspension and it will burn with the rest of the petrol:) also ULP and super ULP only has a life of 12-16 weeks, before it starts to breakdown:( as there is not fixed chemical recipe for petrol, ?? knows what's in it:mad:
it burns and they make PROFIT:wasntme:

cheers

[olmate]

So true indeed. I have done the metho trick before but this time it appears that the original tank has let go of a lot of crud the isn't appreciated by the system or by me :o

Fingers crossed - it will be good now. Shall watch it for the next few days.