What have you done today with your Austin Seven

[AustinWood]

A modern filter element is available to replace the brass mesh on the inlet to the Zenith updraught.
I found in-line filters obstructed the flow too much.

[Jack in the Box]

Many thanks for the responses.

Jim, do you have experience of the “modern” filter and know where they can be obtained please? That seems like a good way to avoid an unsightly arrangement.

Alan

[David.H]

Yes what is this replacement? I found a little Wipac filter (same as fitted to the RK saloon) It fits below the tap& looks the part! I would still like a mesh in the banjo ( on ebay at the moment there is one that might be ok)

[JonE]

"What’s the general view about fitting in line filters. Alan"

I use one of these:



150 Micron filter, designed for systems without a fuel pump ( I have a gravity feed system), Briggs and Stratton part number 298090S, 5 quid or so online.

Stops all the chunks reaching the carb but you will need a bit of 1/4" rubber fuel line to put it in somewhere. Clean it out every spring.

Solved all my problems!

P.S. Don't use filters that are designed to be used with a fuel pump, on gravity systems because they cause fuel starvation...…..

Unless you have a new tank, these things are surely going to fill up and then block with rusty particles pretty quickly? I've got one sitting here and it has no spare volume to retain what it filters. The oversize versions of the cheap plastic inline filters have a huge surface area of filter and don't seem to impede flow...

[Mark McKibbin]

If you were lucky enough to have a foot of head between the tank outlet and the carby inlet that is only about 0.3 psi, most pumps put out at least 1.5 psi and most do more, so most filters are useless.  Motorcycle filters should be OK but they will not have much capacity, I think they should at least be clear like this one so you can see what is going on.

[AustinWood]

The filter for updraught carbs is from A7Components.
Item is: "BE24f Filter for Zenith 22FZ carburettor"
On my car the brass union onto which the filter goes was worn and I used some PTFE tape.

[Adrian Payne]

How did you create the 3 D model,Adrian ?
Most of these I have seen are either cracked, broken or,worn where the bearing fits.To be expected at 85 year old I suppose.

Very careful measurement of the original and then modelled in a very old version of ProDesktop

Awesome work there Adrian.

You're most kind.

Adrian.

[Parazine]

"Unless you have a new tank, these things are surely going to fill up and then block with rusty particles pretty quickly? I've got one sitting here and it has no spare volume to retain what it filters. The oversize versions of the cheap plastic inline filters have a huge surface area of filter and don't seem to impede flow... "

Life was challenging for the first few years that I had the Chummy on the road and I used a glass/plastic in-line filter like this:

   

However, the tap kept getting blocked, usually on a hard uphill thrash, so I cleaned the petrol tank with a handful of brass shrapnel, while turning it, strapped to a concrete mixer drum!


That certainly helped but the tap still got blocked occasionally, so I cobbled together a brass mesh filter cage to go over the inlet to the tap and put the 150 micron filter further down the line. That way, anything big enough to block the tap is stopped by the mesh and 150 micron is dust sized. Providing they are both serviced yearly, they don't seem to give problems and I don't have any more petrol blockages. The 150 micron filter just washes out in petrol..... I do carry a spare in the car though, just in case!

The flow rate is fine, supplies enough petrol to do Porlock and Countisbury, mostly flat out in 1st gear on a half full tank. If you google the filter's spec, it's designed for gravity feed.

TR

[Paul Nott]

Decided to clean up radiator header tank and repaint. 
Found under layers of old paint an interesting
makers/ repairs name plate.
Does any one know if this is indeed a repairers stamp or was it supplied new like this (1927).
Many thanks.

[Dave Mann]

  B & G filter 690612.jpg (Size: 4.22 KB / Downloads: 204) I found the Briggs and Stratton filter 690612 more in keeping with the car's age.