| Author |
Message |
joemama
Samba Member
Joined: February 09, 2006
Posts: 1636
Location: La Crescenta, California
|
 Posted: Sat Jan 31, 2015 7:40 pm Post subject: dual to single vacuum advance? |
 |
|
| Can you convert a bosh dual vacuum advance distributor to single vacuum advance? Is it just a matter of changing the can? |
|
| Back to top |
|
 |
mcdragracer
Samba Member
Joined: December 30, 2007
Posts: 714
Location: Cally
|
| Posted: Tue Feb 03, 2015 2:35 am Post subject: |
|
|
| What would be the purpose? For starters the vacuum units aren't interchangeable between the distributors, the single from what I remember has a spring that pulls the advancement plate back when at idle, what pulls the advancement plate back on the dual vacuum is the bigger spigot port on the dual vacuum unit. |
|
| Back to top |
|
|
Marv [UK]
Samba Member
Joined: January 07, 2009
Posts: 2225
Location: UK
|
| Posted: Tue Feb 03, 2015 3:02 am Post subject: Re: dual to single vacuum advance? |
|
|
| joemama wrote: |
| Can you convert a bosh dual vacuum advance distributor to single vacuum advance? Is it just a matter of changing the can? |
Yes, your dual vacuum dual advance distributor has vacuum advance and mechanical advance and vacuum retard, hence dual vacuum, dual advance.
Simply disconnect the vacuum retard line and plug the hose from the carb with a screw. Your timing will then not be retarded to 5 degrees ATDC and run like hot crap.
_________________
The opinion of the author as expressed does not always reflect that of the author nor does he extend any apologies or assume any liability or responsibility for its content or lack thereof or for any lack of humour of the reader of any content at all, anywhere, ever. The reader agrees to all risk by reading it and is advised that any ‘issue’ is theirs alone as they chose to read it. |
|
| Back to top |
|
|
HRVW
Samba Member
Joined: May 01, 2011
Posts: 2531
Location: Rosarito, Mexico
|
| Posted: Tue Feb 03, 2015 3:26 am Post subject: |
|
|
 Assume the dist is a single vac and adjust timing to the 7.5 mark. |
|
| Back to top |
|
|
Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 76912
Location: Sneaking up behind you
|
| Posted: Tue Feb 03, 2015 4:46 am Post subject: Re: dual to single vacuum advance? |
|
|
| joemama wrote: |
| Can you convert a bosh dual vacuum advance distributor to single vacuum advance? Is it just a matter of changing the can? |
Yes, but mixing and matching the cans can give unpredictable results.
I would just disconnect the vacuum retard.
_________________
Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
#BlueSquare |
|
| Back to top |
|
|
|
