Swap meet webers...need help and ideas (pics)

[in2hotrods]

I picked up two weber carbs at a swap meet yesterday. The price was nice. I need help finding out what they are. They appear to be matching and one still had the plastic caps on it like it was new or at least serviced.

The marking on the base says 28/30 DHTA but I'm having very little luck finding information online about them. They are the down draft style and on top only one opening has a choke flap.

Pictures:





Questions:
Is this a progressive 2bbl? I have a stock 170 in my car currently but was thinking of swapping it out, would one or both of these be suitable on a stock 200? How 'bout a stock 250?

I am unfamiliar with the weber carbs but willing to read up and learn. Any help is appreciated.

 

[wallaka]

The DHTA might be good in a double configuration on a 250 or 200, but is really a very small carb. It was made for 1.3/1.4L engines in the late 70's. Not sure if it's progressive but I doubt it. work the throttle while looking at the butterflies. If they open at the same time, it's not a progressive carb. Since it was made for four-cylinder cars, it is probably not progressive.

The DGAV or its twin Holley 5200 is a good bit larger (32/36 mm bores) and is a much better match. On a slightly modified 250, a DGV bored out to 36/36 or 38/38 DGS would be even better.

 

[in2hotrods]

[/quote]It was made for 1.3/1.4L engines in the late 70's.[/quote]

Hmmm...Thanks for the info, where do you find out things like that?

[/quote]Not sure if it's progressive but I doubt it. work the throttle while looking at the butterflies. If they open at the same time, it's not a progressive carb. [/quote]

The butterflies don't both open at the same time, the secondary seems to be controlled by the item highlighted in the picture below. Is this some kind of vacuum control or damper?




Any online sources for reference would be greatly appreciated.

 

[Bort62]

Well, I can't see your picture but I would bet that's a vacuum operated secondary.

 

[wallaka]

My Google-Fu is strong. Plus I have a friend that has a rusty old Fiat X1/9 that has that carb, and we replaced it with a 32/36 a while ago. Much peppier than stock.

 

[in2hotrods]

Well, I can't see your picture but I would bet that's a vacuum operated secondary.

Hmm....

Here's a direct link:

http://i252.photobucket.com/albums/hh33 ... 1440-1.jpg

Anybody else having trouble viewing?

 

[Bort62]

It's my problem, not yours.

 

[wallaka]

He's at work behind a content filter.

 

[Bort62]

I love how everyone knows my situation. That's a sign I might spend a wee bit too much time on fordsix.com

 

[in2hotrods]

He's at work behind a content filter.

Bummer.

I'm trying to ID some of the connections so I labeled this picture:



I believe 1&2 are for the choke, but don't know which is in/out.

I have no idea what 3 is but looks like an electrical hookup of sorts.

Number 4 appears to be vacuum, but what kind and is it necessary?

I believe 5&6 have to do with fuel, but again...in/out?

There are various other ports/connections in the other views. I have no problem plugging things up but would like a better understanding of what they are for or if the carb depends on them.

 

[powerband]

TO join in the discussion: The two carbs look like a small progressive like the 5200. Only the primary needs a choke plate since the secondary is closed. Also they have the water heated choke setup like the 5200/HW's.

Two working small progressives would be cool on a modified head. No need for progressive linkage if you use progressive 2Bbl's.

Here's a few 5200's, note similaritys:

PB

 

[in2hotrods]

Only the primary needs a choke plate since the secondary is closed. Also they have the water heated choke setup like the 5200/HW's.

Thanks for the info on the choke. Does it matter how the water is hooked up as far as in/out?

Two working small progressives would be cool on a modified head. No need for progressive linkage if you use progressive 2Bbl's.

Yeah, after hearing these are too small I started thinking about putting them both on. I didn't even think of the benefit of using progressive carbs instead of a progressive linkage. Cool, that would be a bit easier.

 

[powerband]

Only the primary n.... Also they have the water heated choke setup like the 5200/HW's.

Thanks for the info on the choke. Does it matter how the water is hooked up as far as in/out?

e 2Bbl's.

. Cool, that would be a bit easier.

As far as the choke, for the H/W's you can swap in an electric element if you need. My '63 wagon with a 5200 has the water choke removed. It starts and runs fine without choke.

PB

 

[HARVEY LIGHT]

Fiat used these on their 128 and X1/9 during the mid to late 70's. (1280 cc motors up through 1500 cc) so for a 3.3 you would probably want the pair. Since the H/W is a direct descendant of the Weber - you are talking about a cheap but effective solution to fuel management.