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hillsci
Samba Member
Joined: May 10, 2007
Posts: 17
Location: St. John's, Newfoundland
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 Posted: Tue May 20, 2008 3:42 pm Post subject: Dual Advance & Retard Vacuum Can Testing |
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Hi All,
I'm testing a dual - Advance and Retard - vacuum can from a '73, 1700 Westy. With the mighty vac I have good vacuum on the Advance side but the Retard side leaks a bit. This occurs on 2 cans I have. Is this normal or should it hold vacuum on both sides? Thanks
Dave |
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keifernet
Samba Search & Rescue
Joined: May 11, 2002
Posts: 19395
Location: Samba Center for Behavioral Science
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| Posted: Tue May 20, 2008 3:49 pm Post subject: |
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| it should hold vac on both... |
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busdaddy
Samba Member
Joined: February 12, 2004
Posts: 52606
Location: Surrey B.C. Canada, but thinking of Ukraine
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| Posted: Tue May 20, 2008 4:28 pm Post subject: |
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Look over the retard nipple closely, they get dinged often (vulnerable spot on a type 1) and get loose and leaky. JB weld is your friend here. There's only one diaphram in there so if it leaks one way it should leak the other.
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keifernet
Samba Search & Rescue
Joined: May 11, 2002
Posts: 19395
Location: Samba Center for Behavioral Science
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| Posted: Tue May 20, 2008 4:39 pm Post subject: |
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| busdaddy wrote: |
| Look over the retard nipple closely, they get dinged often (vulnerable spot on a type 1) and get loose and leaky. JB weld is your friend here. There's only one diaphram in there so if it leaks one way it should leak the other. |
Not neccesarily... I have seen plenty of DVDA that the vac advance side worked fine (held vacuum) when the retard side did not... and some even get by changing the timing spec to 7.5 BTDC instead of the 5 ATDC and they work fine....
Especially when you make the proper mod to the GERMAN DVDA flange # carbs when you switch to SVDA or 009 or other mechanical advance distributor requiring the change in timing specs
http://www.thesamba.com/vw/forum/viewtopic.php?t=365762&highlight=rivet |
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