[T2] Vacuum advance

[Bob Pratt]

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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