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Shanedante0917
Samba Member
Joined: December 20, 2010
Posts: 13
Location: Redding
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 Posted: Mon Dec 20, 2010 3:39 pm Post subject: SVDA or DVDA |
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| Okay, so when I went buy the local Volkswagen mechanic. They overlooked everything and he said I was going to want to change my distributer to an electronic ignition, so I was looking how to do that up and I have been noticing a lot of the 009, SVDA or DVDA distributer. I already decided I don't want the 009, but what distributer would be best for a 1973 bus with a single carburetor? I read that the 1973 should have a DVDA? Not sure about anything though. |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50348
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| Posted: Mon Dec 20, 2010 3:45 pm Post subject: |
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| If you have gone to a not stock carburetor you might as well use a SVDA distributor as you will not have all the correct hook ups for the DVDA distributor. |
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Randy in Maine
Samba Member
Joined: August 03, 2003
Posts: 34890
Location: The Beach
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Shanedante0917
Samba Member
Joined: December 20, 2010
Posts: 13
Location: Redding
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| Posted: Mon Dec 20, 2010 6:26 pm Post subject: |
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| Can you buy one like that with an electronic ignition? |
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51144
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Mon Dec 20, 2010 6:29 pm Post subject: |
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| Quote: |
| Can you buy one like that with an electronic ignition? |
| Randy in Maine wrote: |
| an get the petronics installed by them. |
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Randy in Maine
Samba Member
Joined: August 03, 2003
Posts: 34890
Location: The Beach
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| Posted: Mon Dec 20, 2010 6:32 pm Post subject: |
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For the record they are a "points replacement module", not really a true electronic igniton.
But that is what you want to have so that you don't have to fuss with points. |
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SGKent 
Samba Member
Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Mon Dec 20, 2010 8:49 pm Post subject: Re: SVDA or DVDA |
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| Shanedante0917 wrote: |
| Okay, so when I went buy the local Volkswagen mechanic. They overlooked everything and he said I was going to want to change my distributer to an electronic ignition, so I was looking how to do that up and I have been noticing a lot of the 009, SVDA or DVDA distributer. I already decided I don't want the 009, but what distributer would be best for a 1973 bus with a single carburetor? I read that the 1973 should have a DVDA? Not sure about anything though. |
Take a picture of your carb and post it. Pay special attention to what vacuum nipples it has.
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Vanapplebomb
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Joined: November 03, 2010
Posts: 5411
Location: Holland, MI
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| Posted: Tue Apr 22, 2014 5:47 pm Post subject: |
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| Wildthings wrote: |
| If you have gone to a not stock carburetor you might as well use a SVDA distributor as you will not have all the correct hook ups for the DVDA distributor. |
I thought the vacuum retard ports on the carbs were just bellow the throttle plates, which is just the intake manifold vacuum, right?
So, if you are using carbs that do not have the retard port, won't connecting the retard line to an intake manifold have the same effect?
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1800 Type 4 Berrien 295
http://www.thesamba.com/vw/forum/viewtopic.php?t=487021 |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50348
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| Posted: Tue Apr 22, 2014 7:12 pm Post subject: |
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| Vanapplebomb wrote: |
| Wildthings wrote: |
| If you have gone to a not stock carburetor you might as well use a SVDA distributor as you will not have all the correct hook ups for the DVDA distributor. |
I thought the vacuum retard ports on the carbs were just bellow the throttle plates, which is just the intake manifold vacuum, right?
So, if you are using carbs that do not have the retard port, won't connecting the retard line to an intake manifold have the same effect? |
By correct hook up I would be meaning the correct vacuum single. I suspect with some carbs using the DVDA dizzy would be plug and play, while with others most people would never get the idle and progression correct. The carb and dizzy have to work well together for the engine to run well across the board. |
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richparker
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Joined: November 24, 2011
Posts: 6982
Location: Durango, CO
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Vanapplebomb
Samba Member
Joined: November 03, 2010
Posts: 5411
Location: Holland, MI
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| Posted: Tue Apr 22, 2014 8:22 pm Post subject: |
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| Wildthings wrote: |
| Vanapplebomb wrote: |
| Wildthings wrote: |
| If you have gone to a not stock carburetor you might as well use a SVDA distributor as you will not have all the correct hook ups for the DVDA distributor. |
I thought the vacuum retard ports on the carbs were just bellow the throttle plates, which is just the intake manifold vacuum, right?
So, if you are using carbs that do not have the retard port, won't connecting the retard line to an intake manifold have the same effect? |
By correct hook up I would be meaning the correct vacuum single. I suspect with some carbs using the DVDA dizzy would be plug and play, while with others most people would never get the idle and progression correct. The carb and dizzy have to work well together for the engine to run well across the board. |
So for something like an IDF that plays well with svda distributors, it should then also play well with the dvda if the retard line is hooked to the intake manifold ?
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1800 Type 4 Berrien 295
http://www.thesamba.com/vw/forum/viewtopic.php?t=487021 |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50348
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| Posted: Tue Apr 22, 2014 9:47 pm Post subject: |
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| Vanapplebomb wrote: |
So for something like an IDF that plays well with svda distributors, it should then also play well with the dvda if the retard line is hooked to the intake manifold ? |
A DVDA distributor is going to require that the carb pass more air at idle than what would be required with a SVDA dizzy. If this requires opening the throttle plates too far, you may get a bog coming off idle. I can't say how it will work, but can say that most people don't try to make it work. |
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airschooled
Air-Schooled
Joined: April 04, 2012
Posts: 12722
Location: on a bike ride somewhere
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| Posted: Tue Apr 22, 2014 9:48 pm Post subject: |
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| Wildthings wrote: |
| Vanapplebomb wrote: |
So for something like an IDF that plays well with svda distributors, it should then also play well with the dvda if the retard line is hooked to the intake manifold ? |
A DVDA distributor is going to require that the carb pass more air at idle than what would be required with a SVDA dizzy. If this requires opening the throttle plates too far, you may get a bog coming off idle. I can't say how it will work, but can say that most people don't try to make it work. |
The 34pict3 had a hole drilled in the throttle plate for this reason. Perhaps that could be drilled out on your setup?
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udidwht
Samba Member
Joined: March 06, 2005
Posts: 3779
Location: Seattle, WA./ HB, Ca./ Shizuoka, Japan
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| Posted: Tue Apr 22, 2014 11:31 pm Post subject: |
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| Vanapplebomb wrote: |
| Wildthings wrote: |
| Vanapplebomb wrote: |
| Wildthings wrote: |
| If you have gone to a not stock carburetor you might as well use a SVDA distributor as you will not have all the correct hook ups for the DVDA distributor. |
I thought the vacuum retard ports on the carbs were just bellow the throttle plates, which is just the intake manifold vacuum, right?
So, if you are using carbs that do not have the retard port, won't connecting the retard line to an intake manifold have the same effect? |
By correct hook up I would be meaning the correct vacuum single. I suspect with some carbs using the DVDA dizzy would be plug and play, while with others most people would never get the idle and progression correct. The carb and dizzy have to work well together for the engine to run well across the board. |
So for something like an IDF that plays well with svda distributors, it should then also play well with the dvda if the retard line is hooked to the intake manifold ? |
That's a crap shoot these days. Plenty of those out there who went and ponied up for an SVDA to run with their IDF's and found out the vacuum side has no effect rendering them to what's essentially a 009.
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1972 Westy Hardtop/Type-4 2056cc
96mm Biral AA P/C's~7.8:1CR
Headflow Masters New AMC 42x36mm heads w/Porsche swivel adjusters
71mm Stroke
73 Web Cam w/Web solids
Dual 40mm IDF Webers - LM-2 - 47.5 idles/125 mains/190 air corr./F11 tubes/28mm Vents - Float height 10.45mm/Drop 32mm
Bosch SVDA w/Pertronix module (7.5 initial 28 total @ 3400rpm)
Bosch W8CC plugs
Pertronix Flamethrower 40K coil
S&S 4-1 w/Walker QP 17862
3 rib 002 Trans
185R14 Hankook tires |
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Vanapplebomb
Samba Member
Joined: November 03, 2010
Posts: 5411
Location: Holland, MI
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| Posted: Wed Apr 23, 2014 3:57 pm Post subject: |
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Pertronix distributors perhaps? I know a lot of people have had issues with the advance on them... Never heard of anyone having that sort of trouble with other distributors.
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1800 Type 4 Berrien 295
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