Weber 24/24 progressive carb

[EVfun]

Sometimes people offer odd VW stuff to me. In this case it is a new in box single Weber 24/24 progressive single carb and manifold for a 1500 single port engine. The center section is unique because the 2 barrels feed into the top part like normal and then part way down split into 2 individual runners. The center is case aluminum while the single port end pieces are steel. It doesn't use VW boots between the center and ends but strait hose sections and comes with 8 hose clamps (2 for each end of each connector, I guess.)

It looks quite a bit smaller bore than the common Weber progressive. It has a mechanical secondary and a manual choke. Are regular Weber progressive parts used inside this thing? Would it be a good carb setup for a near stock 1600 single port engine?
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[Alstrup]

Its a Weber which is originally made for the Brazilian market. Not sure if they had a licenced production of it. Most likely.
On a 1600, - dont bother. Unless you want to use it to dare to be different. When both barrels are open it barely equals a regular 34 Pict3. But If you invest some time in dialing it in I´m sure you could make it do very good fuel efficiency. If you had a 1200 cc engine there could be some idea in it.
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https://www.thesamba.com/vw/forum/viewtopic.php?t=435993

[raygreenwood]

Thi sounds strangely similar to the carb they had on the VW dasher for the 1.5L.

With the air cleaner off it "looks" at a glance like a single barrel. Look down the throat and its two equal sized barrels that were progressive.

Ray

[oprn]

My '76 Rabbit came with a Solex/Zenith 2 barrel progressive carb. By the time I got it to work properly the throttle shaft bores were worn enough to cause erratic idle. I still have it and have wondered how it would have worked on an air cooled 1600.
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Our cars get old, we get old but driving an old VW never gets old!

[modok]

It could be a good carb for a stock or very mild 1600 Dp

I don't think it would be good for a SP, but the larger manifold ends (if they are larger) are good for a SP

[raygreenwood]

[EVfun]

It is a mechanical progressive carb with the typical pin on a bracket attached to the primary throttle shaft running in a slot in a bracket on the secondary throttle shaft. Early movement of the primary doesn't move the secondary throttle but that setup doesn't look very efficient. I didn't play with the throttle except to see it moves freely, but I think the secondary starts to open slowly then quickly as the linkage moves farther.

Alstrup has a very good point. 2 barrels that are 24mm each add up to about the same area as 1 barrel that is 34mm. Since a 2 into 1 increases the plenum space it is perhaps not a great plan for a stock cam engine, and way to small for much else. It was interesting to look at. If it had 40 horse end pieces I might have bought it and tried to find it a big bore 40 horse home.
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[raygreenwood]

[modok]

I suspect.... the venturis are 24mm, the throttles are 32mm

[oprn]

It is a bit of a complicated little beast. The secondary seems to be vacuum operated with a mechanical lock out from the primary it looks like. Ya, been many years since I looked at this thing...

Throttle plates measure out to be 32mm. I am with Modoc on this that it would not benefit a single port engine much if any but might work alright on a dual port. It would be a challenge to fit as is though with all it's warts and gizmos. Pretty bulky.

When I went turbo I pulled it, went to a '75 Sirocco intake because it had a Solex PICT 34 so had a simple single hole instead of the plenum for the progressive. Then I went Weber 40 DCOE draw through.

This carb hasn't seen service since then.
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Our cars get old, we get old but driving an old VW never gets old!

[EVfun]

[modok]

Near zero supply, near zero demand.

So it's priceless

[Max Welton]

[oprn]

I suppose if someone's life ambition was to collect an example of every carb Weber ever produced and put it on display...

I don't know of anyone doing that though.
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Our cars get old, we get old but driving an old VW never gets old!

[modok]

IMO they should be equally valuable as what people here call a "normal progressive"
so, around 20$

There is also model with the float bowl located around the primary barrel instead of off to the side, THAT would actually be the correct one to use on the flat four.
(the float bowl is supposed to be forward)

collect the whole set!

[oprn]

I started collecting an example of every "produced for general sale" 4 cycle model airplane engine 0.30 cu in and smaller, even the ones that were failures. None of these little engines are in production anymore and you would be surprised at what some people want for the ones that were duds!

Just missing one now and I will not pay what is being asked for that particular dud! To me they are worth $40 if new in box or $20 if they have run but guys think they are worth new price because they are out of production! You only got 3 or 4 runs out of them before the valves leaked.
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Our cars get old, we get old but driving an old VW never gets old!

[Alstrup]

[GlobalTune]

i have a dual setup of these brazilians ony my 71' (from denmark) they dont run very well and im a beginner so its abit of a tough spot for me hahaha

[BFB]

ive seen those 24/24's on several dual carb set ups.
I'm pretty sure I have one of those set ups in my parts 'pile', too. picked it up just for the vintage nostalgia .... I figure I'll try it on something one of these days. i also dont think the just because something isn't in use nowadays doesn't mean it didnt work, it could be that, but its more than likely predominately based on product marketing
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