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Mon Mar 28, 2016 4:37 pm

Dear friends,

I'm hoping you can help with my Dizzy/Carb Combo questions.

I have a 69 T2a with a 1600 single port engine. When I bought it it came with a 30/31 carb (poor quality reproduction) and a reproduction SDVA.

I want to go back to Bosch and Solex.

I already found out that the stock carb is the PIC 30-2 and the stock disrtibutor is a Bosch Vacuum advance only. Can you tell me the Bosch or VW part number for the correct distributor?

Also, what other Solex/Bosch Carb/Dizzy Combo's would work well on my 1600SP?

I know the PICT 28 is too small and the PICT 34 doesn't fit my single port manifold.

That leaves me with the PICT 30-3 and 31-3 carbs. Would either one or both of these work with a later Bosch SDVA distributor such as found on 1600DP engines? Or is the vacuum signal not correct?

I believe a 31-3 was originally fitted on 1300DP engines and Bosch SDVA dizzy (in beetles in Europe) and should wirk with my 1600SP engine if jetted correctly. Do you agree?

Not sure about the 30-3. What kind of distributor does it require?

I would prefer to go stock if I can get the parts but I would be happy to run any Solex/Bosch combination that works as well as the stock set-up.

Your help is very much appreciated.

Stefan

Mon Mar 28, 2016 5:09 pm

First you'll need to read this: http://www.thesamba.com/vw/forum/viewtopic.php?t=185095 , if there's any doubts as to exactly which carb base number is for you contact Glutamodo the OP. Then to aquire the carb contact samba member Volkzbitz, he usually has what you need in his core pile and rebuilds them to as good as new, finally Samba member Tasb can likely supply the distributor you need.

Mon Mar 28, 2016 5:13 pm

Carburetor/Distributor Matchup
http://www.vw-resource.com/carb_dist.html

Comparing stock Solex carbs to each other, and to the H30/31
http://www.thesamba.com/vw/forum/viewtopic.php?t=185095

Mon Mar 28, 2016 8:19 pm

I'm running the German, Solex 30-2 and a 113905205T Bosch distributor on my 69 convertible with a single port 1600. Both items have been refurbished. This carb and distributor combo is what was on the 1969 bugs when they were new. It is a really nice combo that works very well.

Some folks are not fans of the Solex 30-2 carb but I've always liked them and have had no issues with the carb.

For a 1600 single port, you have many good carb choices for that motor. The 30-1 with the high speed enrichment, 30-2 or even the 30-3. The other carb that wasn't delivered on USA delivered VW's is the 31-3 that the H30/31 was copied from. It has a bit bigger venturi as well. As it was mentioned already, just get a carb that's been rebuilt and had the throttle shaft bushings done.

For a single port and a 30 series carb, you simply can't beat the 113905205T distributor. They just work flawlessly after they have been taken apart, cleaned, re-greased, lubed and shimmed. They are very plentiful and they are inexpensive to purchase a refurbished one.

Tue Mar 29, 2016 12:10 am

Thank you everyone for taking the time to reply. It's much appreciated.

I just cannot believe ho many different versions and variants of distributors and carburetors VW (Bosch, Solex) came up with over the years.

Bonus question: The later European 1300cc DP beetle engines (AB) also used SDVA (and DVDA) distributors together with the 31-3 carb. So, if jetted correctly(!) for the 1600SP, that 31-3 and SDVA combo should also work well on a 1600SP....? At least the vacuum signal form the carb should match the distributor.

My guess would be that those parts would be much more available in Germany where I am from but I thought I'd ask the question here anyway.

Thanks again guys.

Tue Mar 29, 2016 5:49 am

StefansBus wrote: Thank you everyone for taking the time to reply. It's much appreciated.

I just cannot believe ho many different versions and variants of distributors and carburetors VW (Bosch, Solex) came up with over the years.

Bonus question: The later European 1300cc DP beetle engines (AB) also used SDVA (and DVDA) distributors together with the 31-3 carb. So, if jetted correctly(!) for the 1600SP, that 31-3 and SDVA combo should also work well on a 1600SP....? At least the vacuum signal form the carb should match the distributor.

My guess would be that those parts would be much more available in Germany where I am from but I thought I'd ask the question here anyway.

Thanks again guys.

The key is to insure whatever carb you choose has the correct base flange number for the distributor you decide on. I also would stay FAR away from any "new" SVDA distributor and look for a pro refreshed original Bosch one.

Re-read Andy (Glutomoto)'s excellent threads posted all ready. There's ton of fantastic information in them.

Tue Mar 29, 2016 2:00 pm

If the carburetor signal and the vacuum advance are a match you should have no advance problems. I'm not familiar with when the dual port 1300 cc engines were issued in Europe but the first Bosch SVDA's after the 36 hp of course- were installed on the auto stick cars. The data I have shows the first DVDA distributors to have been issues in October 1969 for smog regulations.

Tue Mar 29, 2016 2:53 pm

StefansBus wrote: Thank you everyone for taking the time to reply. It's much appreciated.

I just cannot believe ho many different versions and variants of distributors and carburetors VW (Bosch, Solex) came up with over the years.

Bonus question: The later European 1300cc DP beetle engines (AB) also used SDVA (and DVDA) distributors together with the 31-3 carb. So, if jetted correctly(!) for the 1600SP, that 31-3 and SDVA combo should also work well on a 1600SP....? At least the vacuum signal form the carb should match the distributor.

My guess would be that those parts would be much more available in Germany where I am from but I thought I'd ask the question here anyway.

Thanks again guys.

Hi Stefan,
It sounds like you want to try the 31 PICT-3 and are trying to get a feel for whether it would work?
I am hoping the same thing. I have got hold of a 31-3 in good condition that I plan to refurbish for the 1600SP in my Ghia (with a 113905205T). As it was the model for the H30/31 it will fit the SP manifold, but has a slightly larger Venturi. My understanding is that the 1600 engine pushes the airflow limits of the 30 series carbs.
The good thing is the 31-3 carbs are readily available in Europe, so you should be able to pick one up cheaply!
My naïve guess is that it can be rejetted to work with the 1600. I hope with my wideband and the Samba wideband thread it will work.
Interesting thread, as the 31 PICT-3 is one carb (most of) the Americans aren't that familiar with.

Tue Mar 29, 2016 3:13 pm

I don't think I can link to a live auction, but there is more than one NOS Solex H30/31 on German EBay...

Tue Mar 29, 2016 4:05 pm

tasb, yeah, in Europe they tried the DVDA but later went back to the SDVA as the DVDA didn't work so well (I think higher fuel consumption).

The later European 1300cc (AB) DP engines had a 31-3 and a Bosch SDVA dizzy. That's the combo I would try (rejetted) on my 1600SP if I can't get a hold of the original carb/distributor combo. But right now it loos like I will be able to go stock. :D

mcdonaldneal, thank you. The H30/31 are not really NOS but new licensed built carbs form Brosol in Brasil (I think) using the Solex name. They are not the same as NOS Solex 31-3. I also don't think that the 31-3 would work so well with your original single advance (vacuum only) 205T distributor which, if I am not mistaken uses the larger diameter vacuum can as opposed to the smaller one found on the SVDA (single vacuum, dual advance) distributors originally used with those carbs. As has been said by tasb, the DVDA distributor was also used with the 31-3 but that combination was not popular and didn't last long. If you are going to try a 31-3 I think(!) you would also need to get the proper SDVA to go with it (from a 1300, AB engine). That's just my guess as I think the carbs vacuum signal would match that distributor.

If you want to keep your vacuum only 205T, then you should stick to those early PICT 30 carbs which were built for vacuum only distributors. That's my understanding anyway, after some preliminary research. Happy to be corrected, though.

Tue Mar 29, 2016 9:31 pm

It's SVDA not SDVA. SDVA would = single dual vacuum advance which is confusing.

Wed Mar 30, 2016 12:21 am

StefansBus wrote: tasb, yeah, in Europe they tried the DVDA but later went back to the SDVA as the DVDA didn't work so well (I think higher fuel consumption).

The later European 1300cc (AB) DP engines had a 31-3 and a Bosch SDVA dizzy. That's the combo I would try (rejetted) on my 1600SP if I can't get a hold of the original carb/distributor combo. But right now it loos like I will be able to go stock. :D

I also don't think that the 31-3 would work so well with your original single advance (vacuum only) 205T distributor which, if I am not mistaken uses the larger diameter vacuum can as opposed to the smaller one found on the SVDA (single vacuum, dual advance) distributors originally used with those carbs. As has been said by tasb, the DVDA distributor was also used with the 31-3 but that combination was not popular and didn't last long. If you are going to try a 31-3 I think(!) you would also need to get the proper SDVA to go with it (from a 1300, AB engine). That's just my guess as I think the carbs vacuum signal would match that distributor.

If you want to keep your vacuum only 205T, then you should stick to those early PICT 30 carbs which were built for vacuum only distributors. That's my understanding anyway, after some preliminary research. Happy to be corrected, though.

Thanks Stefan, I have a spare 021 905 205P, which is an SVDA distributor. (From our '78 bus!) If I can find the 'correct' distributor reference number for a 31-3 I could compare the vacuum curve on the Oldvolkshome site. I also have an 009, but I don't think that would be a good pairing.
I get your point about the vacuum only distributor not being a good match.

Wed Mar 30, 2016 5:56 am

Thanks tasb. Yes, I did mistype SVDA. Thanks for clarifying. It wasn't my intention to confuse anyone. I am however aware that its a single vacuum, dual advance.

neal, I Think you are right that the 009 is not normally a good choice for any kind of stock Solex single carb setup. If (!) the vaccuum signal of your 31-1 works for your SVDA dizzy, then it should work. However, my guess is that the late model 1600DP SVDA dizzy needs the vacuum signal form the stock 34 carb to work properly. That's why I think that the only workable (non-stock) combination would be a 31-3 and a Bosch SVDA from a late 1300DP as they were used together. Then the carb would only have to be rejetted for the 1600SP.

Another way of putting it is that the best way to ensure the carb and dizzy are a fit is to choose a combination which has been used by VW in a stock setup on at least one engine.

Wed Mar 30, 2016 6:23 am

Sorry if this is a thread hijack, but I think it's still along the same lines as the original post... :?

For info, this is a pic of the stock SVDA from a Euro 1300DP from another thread

And a chart from Glutamodo, listing some of the distributors compatible with the 31-3. Again, from another thread. He clearly knows a thing or two...

Looks like 113905205 AJ or AL works with the 1300 DP and 31-3
glutamodo wrote:

FYI - here's a collection of specs that the 2nd generation 30PICT-3 (1200) and the 31PICT-3 and 31PICT-4 carbs used from 1971-74. These are all carbs set up for DVDA or SVDA distributors, not vac-only like the 1970 carb was and the H30/31PICT aftermarket carb.

[img][/img]

Wed Mar 30, 2016 9:18 am

Yes, that combination does indeed look like it would work.

My original reservations were based on the following info from one of your posts:

I have a spare 021 905 205P, which is an SVDA distributor. (From our '78 bus!)

The 205P from your 78 Bus probably won't work with the 31-3. The one in the last post should.

Good luck and maybe let us know how it worked out for you.

All the best!

Stefan

Wed Mar 30, 2016 10:39 am

I'm going to chime in late here.*

A 1584 single port engine is an excellent match for a 30pict3 and a 205T distributor. Jet it exactly as in the "Without Guesswork" book for 1970, though you may need to up your main jet one size if you have 10% ethanol blend gasoline.

*My chime in is late, because I've been driving my bus everywhere with the same setup. It delivers crisp throttle response, excellent acceleration, and good fuel economy in all climates. I put the same setup in my mom's bug, but with a different jet setup, and it runs like a dream. There are probably hundreds of setups that make these cars run well, but this one was vetted by Volkswagen back in the day, and it still holds up with new-car drivability today.

Robbie

Wed Mar 30, 2016 2:39 pm

Thanks Robbie,

Stock for my 69 is the 30-2 and I can get a like new (rebuilt) unit here in Germany, so I think I will give that a try in conjunction with the correct vacuum advance only distributor VW 111 905 205 AA, also rebuilt, which is the VW replacement for all the different distributors originally used on the 1600SP (engine code B).

Very good to hear that you are happy with your set-up. Should mine end up not working well (although I don't see why that would be) I now know what does work.

So, thanks again everyone!

Stefan

By the way: On a German forum I was told about this link

http://www.amescador.nl/documenten/VW_T2_%20BUS%20.pdf

It's a complete Early Bay VW parts catalog. It's one way of finding out which carb or distributor was originally installed on each engine (amongst many other things of course). It's in German but there are drawings :-)

Wed Mar 30, 2016 11:08 pm

The 30pict2 is great as well; I prefer the pict3 for long highway flogs, since it has an extra "enrichment circuit," or "power" jet tube for keeping exhaust valves happy with a richer mixture under full throttle conditions.

Robbie