> The timing advance should increase as RPM go up (mechanical advance)
> The timing advance should increase as the laod goes up (vacum controled)
> Vacum is high at low load and low at high load between the engine and
> the Butterfly
> Vacum is Low at low load and high at high load between the butterfly and
> the outside
> You want to connect a Vacum Advance to the outside of the butterfly
> You want to connect a Vacum Retard to the inside of the butterfly
>
> Do I have that ok?
>
> My problem is that I have a Weber DVG carb and it only has a vacum takup
> point on the inside of the butterfly and a vacum advance...
>
> So, what do I do? How do I solve the problem (for the moment, I am
> running with the vacum line disconnected)...
>
> Does anyone know a way to get a low vacum takup point on the dgv?
>
Close, but not quite right. Advance should DECREASE as load goes up,
therefore vacuum advance modules get connected to intake manifold or the
ported vacuum at the butterfly. If you are SURE that your distributor is a
vacuum advance and NOT a vacuum retard (some of the 1500s are retards ;),
you might be fine to connect it to the carb. If this is the stock dizzy for
the engine, it would expect to see manifold vacuum rather than ported
vacuum.
David Lieb
1972 vacuum advance
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