[T2] Vacuum advance

[Bob Pratt]

Thanks Bob and Dave and the rest for your comments.

Bob

> On Oct 10, 2016, at 6:05 PM, Robert Mann <robtmann7 at gmail.com> wrote:
> 
> In those days VW engines had no oil filter.  Some aftermarket filters have been designed to act also as a low-efficiency oil filter.
> 
> Robt Mann
> '73 1600dp Devon camper
> 
>> On Tue, Oct 11, 2016 at 10:31 AM, Bob Pratt <ka1dza at verizon.net> wrote:
>> Hi all,
>> First, I own a '71 transporter with stock manual transmission and, I think, stock engine.
>> I don't know if the dizzy is original to the engine. Also, was an oil filter stock to that year engine? When I bought the bus, there was an oil filter that protrudes out the rear of the motor.
>> 
>> Bob
>> 
>> > On Oct 8, 2016, at 7:45 PM, Dave Gillingham <dave at coronado-realty.com> wrote:
>> >
>> > I agree that you should probably use a vacuum advance dizzy regardless of what is inside.  I fought with a 009 (which used to be all the rage) for several weeks, trying to figure out a stumble, before I bought a $5 vacuum dizzy at a swap meet and solved the problem.
>> >
>> > Sent from my iPhone
>> >
>> > On Oct 8, 2016, at 4:40 PM, Dennis Gentry <dennis.gentry at gmail.com> wrote:
>> >
>> >> What kind of bus? (I guess it must be '71 or earlier with a smaller engine,
>> >> because I think '72 and later all have vacuum advances).  Manual or
>> >> automatic transmission?
>> >>
>> >> I'm guessing that by "electronic ignition" you mean something like a
>> >> Pertronix conversion or entire new distributor?  (I like those, by the way.)
>> >>
>> >> I would stick with centrifugal advance if that's what came stock --
>> >> centrifugal and vacuum advance produce different advance curves.  But most
>> >> of the buses I have worked on came with a vacuum advance.
>> >>
>> >> Is it that you can't find a vacuum inlet on the carburetor to connect to
>> >> the distributor's advance unit?
>> >>
>> >> Again, it depends on the year of the bus (and type of transmission), but my
>> >> '72 manual, for example, has a 4th gear vacuum advance cutoff switch which
>> >> interrupts the vacuum once you're in 4th gear.  If you are really switching
>> >> to vacuum advance from factory centrifugal, you'd probably want something
>> >> like that unless you are willing to leave the timing less advanced than is
>> >> optimal.
>> >>
>> >> Or if this is just to get the bus 10 miles to the garage, you can just
>> >> leave the vacuum advance disconnected and get by with the mild
>> >> centrifugal-only advance that most "vacuum advance" distributors have (and
>> >> you'll cut 20% or so off your maximum power.)
>> >>
>> >> OK, I'll pipe down until I find out more about your bus.
>> >>
>> >> Best,
>> >> Dennis
>> >> P.S.
>> >> https://www.wolfsburgwest.com/wolfsburg_new/electrical/electrical_common/distributors.cfm
>> >> and https://www.summitracing.com/parts/pnx-d186504/overview/ have some
>> >> examples of what I'm talking about.
>> >>
>> >> On Sat, Oct 8, 2016 at 3:56 PM, Bob Pratt <ka1dza at verizon.net> wrote:
>> >>
>> >>> Hi all.
>> >>> I finally found someone who will help me with the wiring on the bus.
>> >>> Now I'm working on getting the engine started to drive 10 miles to the
>> >>> garage.
>> >>> A friend gave me a distributor with an electronic ignition and vacuum
>> >>> advance.
>> >>> My bus does not have vacuum advance. Is it difficult to change over? Do I
>> >>> need a different carburetor?
>> >>> Thanks again for the group's collective knowledge.
>> >>> Bob
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