Weber carby problems, Urgent help req'd!

Hi Phillip A, Mark2, have had a mechanic mate look at the float, and agrees that it should be around 6 - 7 mm gap from float to carby body, no the float is not upside down. We've bent it up to suit, and he seems happy that it is functioning properly, and suggests maybe using a low volume electric fuel pump to assist with constant fuel supply, rather than the 'pulsing' of the (new and working) mechanical fuel pump. Maybe the 34ich is a little underwhelming for this engine, but am unsure as to which carby should be considered, as I would like to try to have a little bit of economy with the consumption of fuel, I know that this can be hard to accomplish with the Landy. Again, am willing to hear all pro's and con's. Ben.

I doubt the "pulsing" of the fuel pump would have any effect - after all the caburetter is designed for it, although it does strike me that since it is a new pump, is there any possibility that it is the wrong one? In particular the diesel one is identical - except that it has a much more powerful spring (which is what actually delivers the fuel) and if it is the wrong pump the fuel pressure will be too high.

The problem with this engine is that when it was designed, fuel consumption was about at the bottom of the list of desirable features - it was designed for flexibility, durability, and tolerance to lousy fuel. Add a vehicle with zero attempt to reduce aerodynamic drag and a large frontal area, plus a drive train designed for ruggedness and simplicity, and you have a recipe for high fuel consumption. The only thing that could have been done to make it worse would have been to try and get high performance as well (see Stage 1 or even the six!).

Apart from getting everything working properly, the most effective way of improving fuel economy will be to increase the compression ratio, particularly if you have a 7:1 head. This is relatively cheap and simple, and will have only a minor impact on flexibility while improving maximum power, and should yield a modest decrease in fuel consumption provided you do not make full use of the extra power. (some models had an extra spring that came in at half throttle - I haven't tried it, but it is said to be effective)

John

Hi John, thanks for your reply, have taken all on board, I realise the Landy's is as aerodynamic as a block of flats, but we still love the old girl, and with all the ribbing I recieve at work, it makes us want to hang on to it even more, and not go to the 'dark-side', and buy a Toymotor troopie! Thanks, Ben.:D

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Originally Posted by LandyBen

Hi John, thanks for your reply, have taken all on board, I realise the Landy's is as aerodynamic as a block of flats, but we still love the old girl, and with all the ribbing I recieve at work, it makes us want to hang on to it even more, and not go to the 'dark-side', and buy a Toymotor troopie! Thanks, Ben.:D

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In 1966 I shepherded a flock of Landcruisers from Alice Springs to Brisbane - fuel consumption varied from 4-12mpg, depending on how sick the carbie was, and how lead footed the driver. So one of them won't be any better.

But of course, while there are plenty of Landrovers still about of this vintage, you will have to look hard to find any Toys that old still in daily use.

John

After trying the Weber, a Zenith and a Solex, I ended up using a Stromberg from a holden six which bolts straight on. Its essential to fit an adjustable main jet (about $25 from Repco). This gave me much better power and driveabiltiy than all the others I tried and fuel economy was as good as anything else. These carbs can be had for $10 from a wrecker and are extremely simple. With this carb, a new Ducellier distributor and a set of extractors I could cruise on 110. It used to surprise a lot of peope...........

G'day LandyBen :)

This carby wouldn't have a Electric Solenoid on the side of it by any chance, on the engine side, round thing about 1inch long with a wire coming out of it:) if so, it is the fuel Cut Off solenoid, connect it to the Ign side of the coil,(when Ign On Power) mine has, took me a while to work that out,just use a piggie back type spade connector, then if you rebuild your Zenith you just remove the connector:)


The Weber 34ICH has a smaller bowl, and they do tend to vapourise after a long run, short stop(cup of coffee) and restart, will go 100metres then start starving, just pump like &&%**## and it will refill, and away you go;) I am in the process of getting my Zenith Rebuilt, main problem with them is the throttle shaft , they wear and need re-bushing, I have a quantity of Carby Gasket Sets (Minor O/haul Kits)for the Zenith 36IV available.reasonable.

cheers

Hi UncleHo, thanks for the reply, unfortunately no, it does'nt have the solenoid on the side, and yes, it does seem to run out of fuel then pump, pump, pump, and refill the bowl, usually with a line of traffic behind me, single lane, up through the Mountains, as the Landy lurches and coughs and farts until all is right with the world again! I am considering another carby, (current one is a Weber), if the previous suggestions indicate a stromberg, I am happy to try anything, Cheers again, Ben.:)