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sebgi1
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Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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 Posted: Mon Aug 09, 2021 2:32 am Post subject: Collecting parts for '73 dual carbs |
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I started collecting parts to switch from center Weber progressive to dual carb. However I do not found lot of information on this setup. Ratwell has a great page on dual carbs but it covers more the '72 setup which seems quite different.
I take some pics do you see something missing. I think I can find elbows et hoses pretty easily.
What is suppose to be there?
Is the seal to the air snout available somewhere?
Thanks!
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'73 Neptune blue safare camper
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busdaddy
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Joined: February 12, 2004
Posts: 51163
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Mon Aug 09, 2021 7:55 am Post subject: Re: Collecting parts for '73 dual carbs |
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The EGR crossover pipe went there, you can fabricate some blanking plates and gaskets to seal them up.
I don't recall seeing the seals available new, good used ones turn up now and then, a big fat O ring, or a slice of large diameter radiator hose also works if you can't find the real deal.
The elbows are available from many vendors, if you weld a nipple into the crossover pipe for the aircleaner valve you can avoid buying the oddball RH elbow. Or put a nipple in the EGR block off.
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sebgi1
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Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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| Posted: Tue Aug 10, 2021 9:06 am Post subject: Re: Collecting parts for '73 dual carbs |
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Ok thanks! No bits missing? Then I just need to have these rebuilt and swap them.
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busdaddy
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sebgi1
Samba Member
Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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| Posted: Tue Aug 10, 2021 11:15 am Post subject: Re: Collecting parts for '73 dual carbs |
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I run a svda right now, will have to check for the exact number. I may also have one with the avance/retard can in the part bin, again will have to check numbers.
Which distributor is the best with this setup?
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busdaddy
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| Posted: Tue Aug 10, 2021 12:05 pm Post subject: Re: Collecting parts for '73 dual carbs |
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The DVDA works well with those, but it has to be the correct model to match the base numbers on the carbs. A SVDA can be made to work, but you will likely have to modify the throttle plates (close up the bleed holes) to get it to idle below 1500 RPM.
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Vanapplebomb
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Joined: November 03, 2010
Posts: 5418
Location: Holland, MI
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| Posted: Tue Aug 10, 2021 7:34 pm Post subject: Re: Collecting parts for '73 dual carbs |
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The central idle circuit you have is incomparable with the manifolds. That is a ‘72 central idle circuit crossover tube, for the short ‘72 manifolds. You have the tall 73/74 manifolds. Things will not long up because the drivers side carburetor sits higher on the 73/74 manifolds. The inlet to the later manifolds is more horizontal than the earlier ones which angle downwards a bit…and again, the port on the later manifold is slightly higher than the 72 short manifolds.
Find a 73/74 crossover tube to use with your 73/74 manifolds. 
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aeromech
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Joined: January 24, 2006
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| Posted: Tue Aug 10, 2021 7:59 pm Post subject: Re: Collecting parts for '73 dual carbs |
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sebgi1
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Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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| Posted: Wed Aug 11, 2021 4:32 am Post subject: Re: Collecting parts for '73 dual carbs |
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Is it the one am looking for?
https://www.thesamba.com/vw/classifieds/detail.php?id=2458281
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Ceckert64
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Joined: September 16, 2015
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Location: Manitowoc, WI
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sebgi1
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Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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| Posted: Wed Aug 11, 2021 4:20 pm Post subject: Re: Collecting parts for '73 dual carbs |
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| Ceckert64 wrote: |
Yes, that is what you’ll need, let me know  |
Yes!! 
I take the numbers on the carb
021 129 031N
021 129 032N
I think a saw a page somewhere with information about distributor numbers versus carburetor, but could not find it now. Is it in the Bentley?
What this numbers tell you?
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sebgi1
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Location: Quebec, Canada
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| Posted: Sun Aug 15, 2021 6:15 am Post subject: Re: Collecting parts for '73 dual carbs |
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From what I found the carbs numbers match a '74 year bus. Engine code is CB. Any idea what distributor number I am looking for?
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Dogs are the most precious and valuable possession of mankind. VWs are second!
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busdaddy
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Joined: February 12, 2004
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| Posted: Sun Aug 15, 2021 8:40 am Post subject: Re: Collecting parts for '73 dual carbs |
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VW 021-905-205N (Bosch 0231 181 005) is what it should pair with, but as I mentioned earlier you can also use a SVDA with a few mods to the carbs.
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sebgi1
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Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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| Posted: Sun Aug 15, 2021 8:52 am Post subject: Re: Collecting parts for '73 dual carbs |
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Thanks! Not sure I want to mess something modifying the carbs.
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sebgi1
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Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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| Posted: Mon Sep 20, 2021 7:11 am Post subject: Re: Collecting parts for '73 dual carbs |
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Im about to install the new (old) setup. There is and advance port on both carb. Left one is connect to the dizzy advance can what about the right one? Is there a T fitting or something?
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SEB
Dogs are the most precious and valuable possession of mankind. VWs are second!
'73 Neptune blue safare camper
'71 Neptune blue tintop |
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busdaddy
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Joined: February 12, 2004
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Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Mon Sep 20, 2021 8:53 am Post subject: Re: Collecting parts for '73 dual carbs |
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The port on the RH carb is for the EGR, if you aren't running that system cap the port.
_________________
Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
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sebgi1
Samba Member
Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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| Posted: Mon Sep 20, 2021 9:02 am Post subject: Re: Collecting parts for '73 dual carbs |
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Thanks!
_________________
SEB
Dogs are the most precious and valuable possession of mankind. VWs are second!
'73 Neptune blue safare camper
'71 Neptune blue tintop |
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sebgi1
Samba Member
Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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| Posted: Mon Sep 20, 2021 10:56 am Post subject: Re: Collecting parts for '73 dual carbs |
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Double post!
_________________
SEB
Dogs are the most precious and valuable possession of mankind. VWs are second!
'73 Neptune blue safare camper
'71 Neptune blue tintop
Last edited by sebgi1 on Tue Oct 12, 2021 7:00 am; edited 1 time in total |
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sebgi1
Samba Member
Joined: September 19, 2005
Posts: 169
Location: Quebec, Canada
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| Posted: Tue Oct 12, 2021 6:59 am Post subject: Re: Collecting parts for '73 dual carbs |
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Can someone tell me what is the hardware needed for the throttle cable?
How the connecting rod is attached to the barrel on the linkage? Also if there is a spring on the end of the connecting rod, where is the other end attached to?
Any pics?
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Dogs are the most precious and valuable possession of mankind. VWs are second!
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'71 Neptune blue tintop |
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jtauxe 
Samba Member
Joined: September 30, 2004
Posts: 5780
Location: Los Alamos, New Mexico
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| Posted: Tue Oct 12, 2021 8:35 am Post subject: Re: Collecting parts for '73 dual carbs |
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| sebgi1 wrote: |
I started collecting parts to switch from center Weber progressive to dual carb.
<snip>
Is the seal to the air snout available somewhere?
Thanks! |
That seal was the hardest part for me to find. In fact, restoring three sets of these carbs I never did find the proper seal.
Also hard to find is the little three-way rubber hose join, shown in this crappy photo from a deleted ad.
https://www.thesamba.com/vw/classifieds/detail.php?id=733230
I may have one.
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