| Author |
Message |
kevinh94
Samba Member
Joined: January 04, 2007
Posts: 268
Location: Nolanville, TX 76559
|
 Posted: Mon Apr 27, 2009 9:39 pm Post subject: What does Pict Mean? |
 |
|
I have a 1600 DP Motor for my beetle and I am currently in the market for a new carb. I believe I have a 34 PICT 3 carb. I have looked at new carbs and ran across PICT 1 and 3.
What are the differences? What is PICT exactly?
For those of you that want to know why I am buying a new one, I have an air leak in my throttle shaft. Pretty nasty if you were to ask a Rookie.
Thanks For your help in advance.
Kevin
_________________
Low and Slow is the only way to go!!! |
|
| Back to top |
|
 |
keifernet
Samba Search & Rescue
Joined: May 11, 2002
Posts: 19395
Location: Samba Center for Behavioral Science
|
|
| Back to top |
|
|
kevinh94
Samba Member
Joined: January 04, 2007
Posts: 268
Location: Nolanville, TX 76559
|
| Posted: Tue Apr 28, 2009 7:54 am Post subject: |
|
|
Ok that tells me what it means, thanks.
BUT I don't know what the 1 or the 3 is. Is that the specification number they were referring to?
_________________
Low and Slow is the only way to go!!! |
|
| Back to top |
|
|
keifernet
Samba Search & Rescue
Joined: May 11, 2002
Posts: 19395
Location: Samba Center for Behavioral Science
|
|
| Back to top |
|
|
glutamodo 
The Android
Joined: July 13, 2004
Posts: 26498
Location: Douglas, WY
|
| Posted: Tue Apr 28, 2009 9:16 am Post subject: |
|
|
Specification numbers, well that sheet listed on that other page, that's from South Africa and I'm not sure how the carbs that Solex made there
were stamped and labelled.
When VW/Solex were making them for production line cars, that dash-1, dash-3, etc, that was a general series revision number. (I've seen aftermarket carbs not made by Solex that don't always use the correct numbers.) Those threads of mine that Keith posted have a lot of info on little variations. Now, minor variations in the same model of carburetor were known as "modifcation state" changes, and indicated by a series number stamped at the base flange of the carb. I've been trying to made as complete a listing of the different modification states as I can find info on. I'm always willing to add info to my master chart, the latest revision of which I try to keep available here:
https://www.thesamba.com/vw/archives/info/glutamodo/temp/CarbBaseFlangeNumbersA.doc
The dash-1, dash-2, dash-3 thing, here's a synopsis:
The first VW/Solex PICT carburetor came out for model year 1961, the 28PICT. A couple of years later they altered the top of the carb with a different choke pull-off diaphram, and changed the model to the 28PICT-1. When the 1300 came out, they slightly enlarged the carburetor but otherwise it was about the same, and that was the 30PICT-1. Then for 1968 they altered the idle circuit with a fixed metering screw, to make for finer emissions adjustments and that redesign was the 30PICT-2. That wasn't the greatest design, which they re-did again for model year 1970, and made it so the throttle has to be totally shut for the idle circuit to engage, with a dedicated volume (mixture) and air bypass (idle speed) screws, and that was the 30PICT-3. The next year, the dual port came out and for that they made larger versions of the PICT-3, the 31PICT-3 for the 1300DP(not sold in the US) and the 34PICT-3 on the 1600DP. They added the plunger style idle cutoff valves to these carbs, which in itself might have been a major enough change to warrant a new revision number, but for whatever reason they did not do so... The final revision was for California models in 1974, the 34PICT-4, again, with changes to the main jet and accelerator pump.
-Andy |
|
| Back to top |
|
|
kevinh94
Samba Member
Joined: January 04, 2007
Posts: 268
Location: Nolanville, TX 76559
|
| Posted: Tue Apr 28, 2009 9:43 am Post subject: |
|
|
| glutamodo wrote: |
Specification numbers, well that sheet listed on that other page, that's from South Africa and I'm not sure how the carbs that Solex made there
were stamped and labelled.
When VW/Solex were making them for production line cars, that dash-1, dash-3, etc, that was a general series revision number. (I've seen aftermarket carbs not made by Solex that don't always use the correct numbers.) Those threads of mine that Keith posted have a lot of info on little variations. Now, minor variations in the same model of carburetor were known as "modifcation state" changes, and indicated by a series number stamped at the base flange of the carb. I've been trying to made as complete a listing of the different modification states as I can find info on. I'm always willing to add info to my master chart, the latest revision of which I try to keep available here:
https://www.thesamba.com/vw/archives/info/glutamodo/temp/CarbBaseFlangeNumbersA.doc
The dash-1, dash-2, dash-3 thing, here's a synopsis:
The first VW/Solex PICT carburetor came out for model year 1961, the 28PICT. A couple of years later they altered the top of the carb with a different choke pull-off diaphram, and changed the model to the 28PICT-1. When the 1300 came out, they slightly enlarged the carburetor but otherwise it was about the same, and that was the 30PICT-1. Then for 1968 they altered the idle circuit with a fixed metering screw, to make for finer emissions adjustments and that redesign was the 30PICT-2. That wasn't the greatest design, which they re-did again for model year 1970, and made it so the throttle has to be totally shut for the idle circuit to engage, with a dedicated volume (mixture) and air bypass (idle speed) screws, and that was the 30PICT-3. The next year, the dual port came out and for that they made larger versions of the PICT-3, the 31PICT-3 for the 1300DP(not sold in the US) and the 34PICT-3 on the 1600DP. They added the plunger style idle cutoff valves to these carbs, which in itself might have been a major enough change to warrant a new revision number, but for whatever reason they did not do so... The final revision was for California models in 1974, the 34PICT-4, again, with changes to the main jet and accelerator pump.
-Andy |
Thanks That's awesome! That was all I was wanting to know. They are the same carb just have been MORE fine tuned, if you will. Well I think I will go with a PICT 3 again then. It is serving me well but the throttle shaft is worn letting in air.
Thanks for the info and the help. Now I can wait to buy my new and get it here.
Kevin
_________________
Low and Slow is the only way to go!!! |
|
| Back to top |
|
|
glutamodo
The Android
Joined: July 13, 2004
Posts: 26498
Location: Douglas, WY
|
| Posted: Tue Apr 28, 2009 9:49 am Post subject: |
|
|
| kevinh94 wrote: |
Thanks That's awesome! That was all I was wanting to know. They are the same carb just have been MORE fine tuned, if you will. Well I think I will go with a PICT 3 again then. |
Well, remember, if you stray to a different "modifcation state" than you had before, the carb may not run as well, it happens. Generic replacement carbs, sometimes they are great, sometimes not. If you like how your current carburetor is running, you might consider getting it re-bushed. Keifernet (Keith) above does it, although it sometimes takes a while as he gets backlogged. |
|
| Back to top |
|
|
kevinh94
Samba Member
Joined: January 04, 2007
Posts: 268
Location: Nolanville, TX 76559
|
| Posted: Tue Apr 28, 2009 10:07 am Post subject: |
|
|
So you are saying spending about the same on a rebuild as new is worth it? I have a guy here in Salina that will rebush it for me I just though if I am going to spend a hundred why not add 75 bucks to is and buy new?
The new carbs that bad?
_________________
Low and Slow is the only way to go!!! |
|
| Back to top |
|
|
Max Welton
Samba Member
Joined: May 19, 2003
Posts: 10972
Location: Black Forest, CO
|
|
| Back to top |
|
|
Blue69Baja
Samba Member
Joined: September 04, 2008
Posts: 1115
Location: Fair Oaks
|
| Posted: Tue Apr 28, 2009 10:26 am Post subject: |
|
|
Kevin, what ever you do don't get rid of that old 34!!!!! If you buy new and it ends up a POS you can get your old one rebuilt.
New 34's can be problematic....
You can search this forum and others for 34-3 problems....It will take you hours to read all the difficulty folks have with these carbs. 
I would use Kiefernet if you need your carb rebuilt!!!
http://www.thesamba.com/vw/classifieds/detail.php?id=429441 |
|
| Back to top |
|
|
|
