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shiningstar76
Samba Brewer
Joined: July 12, 2003
Posts: 2689
Location: Savannah
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 Posted: Mon Nov 11, 2013 7:14 pm Post subject: 1700 CB Distributor Question |
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My current bus came with a 009 as they seem to, and I've never been impressed. I see that according to old volks home I should have the 205E but am having a hard time finding one. Any harm in running one of the other 205 distributors?
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KK4NTP
96 Tacoma
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tasb
The Distributor Distributor
Joined: April 27, 2002
Posts: 6371
Location: Pentwater, Michigan
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| Posted: Mon Nov 11, 2013 7:44 pm Post subject: |
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The first "205" distributor was manufactured in 1965 and there are over 100 variations of the "205" used in VW's. So, yes it matters.
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dr.bones
Samba Member
Joined: August 27, 2007
Posts: 105
Location: jasper,Ga
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| Posted: Mon Nov 11, 2013 7:51 pm Post subject: |
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| I run a electronic single vacume advance from oriellys ands its awesome on my 1800 and besides the 009 retards a few degress on #3 cyclinder,and yes I also was not impressed on a type 1 engine its fine,but the type 4 engine needs a single vacume advance like it came from the factory,it was good then and should be now.i have had no problems with the one from oreillys,its better than the crappy hei kits here or the petronix ones,besides everything on it is new and warrantied. |
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shiningstar76
Samba Brewer
Joined: July 12, 2003
Posts: 2689
Location: Savannah
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| Posted: Mon Nov 11, 2013 8:24 pm Post subject: |
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| tasb wrote: |
| The first "205" distributor was manufactured in 1965 and there are over 100 variations of the "205" used in VW's. So, yes it matters. |
Glad to hear an expert chime in.
-Are there some close options, perhaps from other 1700 engines? Perhaps 205J or N?
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KK4NTP
96 Tacoma
86 4Runner
My bus caught on fire and is now on the other coast with someone who gave me money for it. |
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dr.bones
Samba Member
Joined: August 27, 2007
Posts: 105
Location: jasper,Ga
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| Posted: Mon Nov 11, 2013 8:32 pm Post subject: |
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| I forget the specific #'s but for example the difference is either single vacume advance or dual vacume advance,basically the 205 stays the same its just the end is diiferent.but ones thing for sure I love the distributor its built by a company that specialiizes in foreign like Hondas,toyota,mitsubishi,etc but it really is the way to go,its only $100 and it comes with a coil as well. |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
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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 Nov 11, 2013 10:01 pm Post subject: |
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| read the specs on your distributor at old volks. Ask if you need help understanding the numbers. Make sure whether it is a SVDA or DVDA, and that you still have the same ported vacuum sources as when the bus was new. For example - if the bus came with dual carbs and a SVDA, do you have the same dual carbs and vacuum setup. If not then even if you got the correct distributor it might not work right because it relies on vacuum signals from the carb(s) that tell it how far to advance. |
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shiningstar76
Samba Brewer
Joined: July 12, 2003
Posts: 2689
Location: Savannah
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| Posted: Wed Nov 13, 2013 10:32 am Post subject: |
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It has a weber dfav for right now. Is the stock 205E still a good choice?
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KK4NTP
96 Tacoma
86 4Runner
My bus caught on fire and is now on the other coast with someone who gave me money for it. |
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1967250s
Samba Member
Joined: May 02, 2007
Posts: 2137
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| Posted: Wed Nov 13, 2013 12:03 pm Post subject: |
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| I think OG was a 205P |
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borninabus
Samba R&D Dept.
Joined: May 18, 2006
Posts: 4539
Location: Arizona Highways
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| Posted: Wed Nov 13, 2013 4:07 pm Post subject: |
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| shiningstar76 wrote: |
| It has a weber dfav for right now. Is the stock 205E still a good choice? |
no 
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shiningstar76
Samba Brewer
Joined: July 12, 2003
Posts: 2689
Location: Savannah
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| Posted: Wed Nov 13, 2013 6:48 pm Post subject: |
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| borninabus wrote: |
| shiningstar76 wrote: |
| It has a weber dfav for right now. Is the stock 205E still a good choice? |
no |
Care to elaborate?
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KK4NTP
96 Tacoma
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My bus caught on fire and is now on the other coast with someone who gave me money for it. |
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borninabus
Samba R&D Dept.
Joined: May 18, 2006
Posts: 4539
Location: Arizona Highways
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| Posted: Wed Nov 13, 2013 7:37 pm Post subject: |
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No ported vacuum 
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shiningstar76
Samba Brewer
Joined: July 12, 2003
Posts: 2689
Location: Savannah
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| Posted: Wed Nov 13, 2013 8:49 pm Post subject: |
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It does have a plugged hose stub, which i can only assume to be a vacuum port. The dgev in my brat has one as well. Any other reason?
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KK4NTP
96 Tacoma
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SGKent
Samba Member
Joined: October 30, 2007
Posts: 41031
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Wed Nov 13, 2013 9:20 pm Post subject: |
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205E is DVDA
| Quote: |
Distributor: VW 021-905-205E, Bosch 0231 173 005
Timing Set At:: 5deg ATDC @ 800-950rpm w/strobe, vacuum hose(s) connected
Advance/Retard Range: Vacuum: 8-12deg Adv, 11-15deg Ret; Centrifugal: 13-16deg @ 2000rpm, 23-26deg @ 3600 rpm |
Let's compare a 1975-78 FI bus with SVDA. All number maximums. Initial is 7.5, mechanical is 24.5 @3400, and VAC is 11 = 43 degrees advance in the worst circumstances. FYI - this is too much advance and it causes the engine to run hot so we back it off actually to about 39 or 40 degrees total (28 or 29 at full in + 11)
Now the 205E. Initial is ?? because you don't have the original setup so let's say 7.5 to make it idle smooth+ mechanical 26 @ 3600 + 12 vacuum = 45.5 max. The FI bus will have near identical mixtures while the progressive will be leaner on 2 of the cylinders when in cruise. Burning or scuffing a piston may be in your life if you hook up the ported vacuum. You'll have to set the initial timing back to about 2 degrees BTDC and that will leave you with a flat spot coming off idle.
That is why. Look for a SVDA and time it 28 BTDC at 3600 RPM with the advance hose off. Then add ported vacuum. If that vacuum is not ported (make sure it is before you buy a SVDA) get a genuine German Bosch mechanical advance distributor with timings for a driven bus and not an industrial engine that is constant speed. |
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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: Wed Nov 13, 2013 9:37 pm Post subject: |
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Let's not forget, comparing one SVDA to another SVDA is like comparing one 009 to another 009.
Or go this route better than both...
http://www.cbperformance.com/ProductDetails.asp?ProductCode=2013
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50352
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| Posted: Wed Nov 13, 2013 10:19 pm Post subject: |
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| SGKent wrote: |
| The FI bus will have near identical mixtures while the progressive will be leaner on 2 of the cylinders when in cruise. Burning or scuffing a piston may be in your life if you hook up the ported vacuum. You'll have to set the initial timing back to about 2 degrees BTDC and that will leave you with a flat spot coming off idle. |
The vast majority of progressive set ups run too rich on all cylinders. If someone has jetted their carb rich enough to get rid of the off idle bog then fuel wash is probably way more likely to be a problem than running lean. These engine run just fine with an initial of 7.5*, plus 20-22* of centrifugal and ~12* of vacuum advance. |
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 51153
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Wed Nov 13, 2013 10:35 pm Post subject: |
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It sort of depends on the distributor because the DFAV makes alot of vacuum on the advance nipple even at idle, the 77-79 021 905 205P is likely the better stock choice as it's already designed to operate off plenum vacuum but then again the midrange curves may be way off. I used to have a Pinto motor that had what looked like a Bosch DVDA distributor on it, I wonder what the specs for that one were as it had a Weber progressive clone of some sort on it right from Ford.
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