[T2] Vacuum advance

[Robert Mann]

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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