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bnam
Samba Member
Joined: July 02, 2006
Posts: 3542
Location: El Dorado Hills CA/ Bangalore, India
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 Posted: Wed Jan 17, 2024 12:08 am Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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| Frank Bassman wrote: |
Uh, I'd be more worried about where the two throttle plate screws went...
Is this an optical illusion or are they AWOL?
-Frank |
Why? No illusion. It should be pretty obvious that the likely reason was I had removed the screws while trying to understand what was going on. That pic was after I had removed the screws (which are visible - though blurred - in the second pic) to remove the plate and see what was up and then tried to get it back to close as flat as it could.
_________________
1971 1302LS Convertible (RHD) owned since '74
Click to view image
1965 Karmann Ghia Coupe - under restoration
1966 Fiat 1500 Cabrio (with 1600 Twin cam)
1952 Citroen TA 11BL |
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Frank Bassman
Samba Member
Joined: July 01, 2012
Posts: 904
Location: Miami
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| Posted: Tue Jan 16, 2024 11:39 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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Uh, I'd be more worried about where the two throttle plate screws went...
Is this an optical illusion or are they AWOL?
-Frank |
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bnam
Samba Member
Joined: July 02, 2006
Posts: 3542
Location: El Dorado Hills CA/ Bangalore, India
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| Posted: Tue Jan 16, 2024 11:15 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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Andy,
I'm trying to troubleshoot a friend's car which is fitted with a 30Pict3 carb (VW226_1). The distributor was advance immediately when connected back after setting timing (which was done hose plugged). I suspected throttle plate was not set properly so tried to do that and was a bit alarmed that for the screw on throttle arm to touch the lowest step required it to be screwed in nearly all the way - made me think that throttle plate was not returning to the correct position.
On removing the carb and inspecting, I noticed this:
Even with the plate fully "closed" the lower of the 2 advance drillings remains exposed. My understanding is that the lower one should be closed when the plate is closed and just exposed when the throttle is cracked open. In this case, it is always open.
One thing that could cause it is if the throttle plate was replaced with an incorrect one at some point. Any thing else that could cause this?
_________________
1971 1302LS Convertible (RHD) owned since '74
Click to view image
1965 Karmann Ghia Coupe - under restoration
1966 Fiat 1500 Cabrio (with 1600 Twin cam)
1952 Citroen TA 11BL |
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glutamodo 
The Android
Joined: July 13, 2004
Posts: 26627
Location: Douglas, WY
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| Posted: Sun Jul 03, 2022 11:50 am Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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Yes, this very thread really started all those years ago to answer the question as to which distributor, if any, was ideal for the H30/31PICT and the answer was more or less the 113905205M or 113905205T. Although most of the vacuum-only distributors from the mid 60s to 1970 are going to work with it.
_________________
Andy T.
"What is Glutamodo, Horror of Toyko, besides total, fiendish, quality-a-you brain!" |
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Moperkont
Samba Member
Joined: November 02, 2021
Posts: 21
Location: Kelowna, BC, Canada
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| Posted: Fri Jul 01, 2022 11:50 am Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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Thanks. I’ve saved those charts.
I guess I will see how this 113 works with my Solex 28 for now. Can’t be worse then my Empi 009 right now hopefully. Haha
I have already been considering going the route of a Solex 30 or Brosol h30/31 anyways. Would you recommend the h30/31 then if I run that 113 distributor? |
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glutamodo
The Android
Joined: July 13, 2004
Posts: 26627
Location: Douglas, WY
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Moperkont
Samba Member
Joined: November 02, 2021
Posts: 21
Location: Kelowna, BC, Canada
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| Posted: Thu Jun 30, 2022 5:47 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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| glutamodo wrote: |
| Moperkont wrote: |
Alright, I went through the bulk of this post but figured I would just ask in case I missed it.
I have a 1200cc 40HP with a Solex 28 and an Empi 009 installed by PO. I have had some running issues with it.
I found a VW 113-905-205M (Bosch ZV/PAU 4R3) distributor with the vacuum canister that I purchased. All the info I found said a 4R1-4R6 would work. Does that seem correct.
The other thing I am considering is a rebuilt Solex 30/31 or a Brosol H30/31.
Does it seem like I’m on the right track? |
Do you mean a 111905205M? The 113 version was used on the later 1500 engine.
The 113 is more a spot on match for a Brosol H30/31 (DVG never made a 30/31 carburetor, by the way. Those are all dregs from the aftermarket)
The 111 was a 40HP distributor matched to the 28PICT-1. |
Here is a photo of the carb I purchased as well as the info that I used to determine it was the proper distributor to use with either a Solex 28, 30 or a Brosol h30/31.
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glutamodo
The Android
Joined: July 13, 2004
Posts: 26627
Location: Douglas, WY
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| Posted: Wed Jun 29, 2022 6:22 am Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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| Moperkont wrote: |
Alright, I went through the bulk of this post but figured I would just ask in case I missed it.
I have a 1200cc 40HP with a Solex 28 and an Empi 009 installed by PO. I have had some running issues with it.
I found a VW 113-905-205M (Bosch ZV/PAU 4R3) distributor with the vacuum canister that I purchased. All the info I found said a 4R1-4R6 would work. Does that seem correct.
The other thing I am considering is a rebuilt Solex 30/31 or a Brosol H30/31.
Does it seem like I’m on the right track? |
Do you mean a 111905205M? The 113 version was used on the later 1500 engine.
The 113 is more a spot on match for a Brosol H30/31 (DVG never made a 30/31 carburetor, by the way. Those are all dregs from the aftermarket)
The 111 was a 40HP distributor matched to the 28PICT-1.
_________________
Andy T.
"What is Glutamodo, Horror of Toyko, besides total, fiendish, quality-a-you brain!" |
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Moperkont
Samba Member
Joined: November 02, 2021
Posts: 21
Location: Kelowna, BC, Canada
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| Posted: Sun Jun 26, 2022 1:10 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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Alright, I went through the bulk of this post but figured I would just ask in case I missed it.
I have a 1200cc 40HP with a Solex 28 and an Empi 009 installed by PO. I have had some running issues with it.
I found a VW 113-905-205M (Bosch ZV/PAU 4R3) distributor with the vacuum canister that I purchased. All the info I found said a 4R1-4R6 would work. Does that seem correct.
The other thing I am considering is a rebuilt Solex 30/31 or a Brosol H30/31.
Does it seem like I’m on the right track? |
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herbie1200
Samba Member
Joined: April 27, 2006
Posts: 836
Location: Rome - Italy
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| Posted: Thu Oct 07, 2021 9:37 am Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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| tb03830 wrote: |
This is a great post. I had mine on "A" I placed it on "B" and most of the Hesitation went away. I say most. "B" had a strong Vacuum. So you are saying "D" is stronger than "B"? I put my finger on it and got little or was a I mistaken about "D". I will test "D" for strong vacuum as soon as the throttle is slightly opened. Thanks for this. |
The vacuum on B is strong but I think is not OK for the advance. If the vacuum advance should be always at max, the vacuum advance has no function, the same result could be obtained with a fixed rotagion of the distributor.
The B port produces ALWAYS a good vacuum because its purpose is to provide constant vacuum to the air filter thermostatic control; it has to work at all conditions.
The D port, in my case, was the best; no vacuum at idle and a variable vacuum during normal rpms. Those engines work well when advance is minimum at idle and at full load, maximum at intermediate conditions. |
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Lingwendil
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Joined: February 25, 2009
Posts: 3999
Location: Antioch, California, a block from the hood
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jarmchairpilot
Samba Member
Joined: March 04, 2013
Posts: 492
Location: GALWAY,IRELAND
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| Posted: Fri Nov 27, 2020 1:03 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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| For most stock applications would the brosol h30/31 pic performance improve simply by adding the biggest vacuum advancing cannister to the stock Bosch 034 style distributor or is it just the airflow through the carb throat that needs to be modified? |
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bnam
Samba Member
Joined: July 02, 2006
Posts: 3542
Location: El Dorado Hills CA/ Bangalore, India
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| Posted: Thu Nov 26, 2020 5:42 am Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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I've often wondered what exactly are the differences across the various 34PICT3 flange numbers/models. Others seem to have similar questions. So I thought I'd consolidate what I've read in this thread and observed myself.
The variables seem to be:
1. Differences in sizes of various removable jets (these can be replaced to match)
2. Differences in sizes of the two air-bleed drillings (if drillings can be enlarged if needed)
3. Power jet size (most seem to be 100, bus ones seem to be 95 and perhaps they can be drilled to 100)
4. Configuration of throttle lever - with/without provision for damper, with/without provision for throttle delay mechanism (these don't really matter for interchange unless you want to retain damper or delay and the carb you are considering does not have them)
5. Configuration of accelerator pump linkage - generator vs. alternator (alternator type will fit all, generator type will require spacer or grinding alternator for clearance)
6. Number/location of vacuum ports (all have advance port, not all have the other 2)
7. Number (and size?) of advance drillings
8. Throttle plate hole size. Most (all?) DVDA ones had the larger holes. Did the SVDA ones have smaller holes? I have seen Bocars with smaller holes, but I'm not considering Bocars in this discussion. (the smaller holes can be made larger by drilling and the larger ones reduced with a rivet I believe)
Any I've missed?
Of these variables, which ones are most relevant for matching with a given distributor? Is #7 the most critical from that perspective? Of course, if you want to use the DVDA retard function, then #6 also becomes important.
_________________
1971 1302LS Convertible (RHD) owned since '74
Click to view image
1965 Karmann Ghia Coupe - under restoration
1966 Fiat 1500 Cabrio (with 1600 Twin cam)
1952 Citroen TA 11BL |
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dougstr
Samba Member
Joined: February 02, 2015
Posts: 1
Location: Coquille
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| Posted: Tue Aug 18, 2020 12:39 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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| Just found this thread, what a wealth of good info. Thank you for keeping at it all of these years! |
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wcfvw69
Samba Purist
Joined: June 10, 2004
Posts: 13699
Location: Arizona
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| Posted: Wed Apr 03, 2019 4:44 am Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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| e-square12 wrote: |
You are right; meant to type 205AN. Just edited my comment for future reference.
Do you test both ends on the DVDA with the pump? |
Correct. 
_________________
Contact me at [email protected]
Follow me on instagram @sparxwerksllc
40+ years of VW repair, and VW parts and vehicle restoration experience.
The Samba member since 2004.
**Now rebuilding throttle bodies for VW's and Porsche's**
**Restored German Bosch distributors for sale or I can restore yours**
**Restored German Pierburg fuel pumps for sale or I can restore yours**
**Restored Porsche fuel pumps or I can restore yours**
**Restored Porsche distributors or I can restore yours** |
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e-square12
Samba Member
Joined: February 19, 2010
Posts: 88
Location: Waterford, MI
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| Posted: Tue Apr 02, 2019 9:52 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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You are right; meant to type 205AN. Just edited my comment for future reference.
Do you test both ends on the DVDA with the pump?
_________________
1974 Super Beetle
1974 Beetle Std Sun Bug
https://www.thesamba.com/vw/forum/viewtopic.php?t=709766&highlight= |
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wcfvw69
Samba Purist
Joined: June 10, 2004
Posts: 13699
Location: Arizona
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| Posted: Tue Apr 02, 2019 9:03 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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| e-square12 wrote: |
| Quick question... I have a carb stamped 325-2 which makes it a 1972 34 PICT 3 based on the table in page 1. Is it ok to use that with the matching 305AN distributor on my 1974 Beetle or would that cause issues? |
I think you meant 113905205AN DVDA distributor. There were two basic versions of the German Solex 34-3 carbs. The DVDA version (most common) and the SVDA version in 1974.
The DVDA's distributors will work with any of the DVDA German Solex 34-3 carbs.
When I check vacuum canisters, i use a hand vacuum pump with gauge. I pump them up to 300mm hg and insure they do not leak down. If they do, they're done. The suck and hold test just doesn't work with any accuracy.
_________________
Contact me at [email protected]
Follow me on instagram @sparxwerksllc
40+ years of VW repair, and VW parts and vehicle restoration experience.
The Samba member since 2004.
**Now rebuilding throttle bodies for VW's and Porsche's**
**Restored German Bosch distributors for sale or I can restore yours**
**Restored German Pierburg fuel pumps for sale or I can restore yours**
**Restored Porsche fuel pumps or I can restore yours**
**Restored Porsche distributors or I can restore yours** |
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H2OSB
Samba Member
Joined: April 14, 2013
Posts: 1549
Location: Modesto, CA
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| Posted: Tue Apr 02, 2019 7:27 pm Post subject: |
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| wcfvw69 wrote: |
| I think this should be a sticky!! |
Uh, yeah.
Great work!
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(o\_i_/o) Funny thing about pigs, they're cleaner than you and me. Well....you. |
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glutamodo
The Android
Joined: July 13, 2004
Posts: 26627
Location: Douglas, WY
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| Posted: Tue Apr 02, 2019 4:27 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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Yeppers, that's about it - put a hose on the retard side, apply suction to it, watch that the breaker plate moves accordingly, then pinch off the hose and see if it holds.
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Andy T.
"What is Glutamodo, Horror of Toyko, besides total, fiendish, quality-a-you brain!" |
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e-square12
Samba Member
Joined: February 19, 2010
Posts: 88
Location: Waterford, MI
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| Posted: Tue Apr 02, 2019 3:32 pm Post subject: Re: Comparing stock Solex carbs to each other, and to the H30/31 |
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Thanks for the feedback. Is there a way to check the retard side of the canister. Suck on it and see if it holds, maybe? I don't have the distributor yet...
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1974 Super Beetle
1974 Beetle Std Sun Bug
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