Twin 40 manifold vacum advance

[gtegary]

Hi, I've just been looking at the manifold for my twin 40's on my 1.6 8v and I can't see any vacum advance take off bits that would go to the distributer.

Any one had the same problem? If so how can this be solved?

I've seen a few pics of 1.6's running twin 40's with no pipe running to the vacum advance on the dizzy?

[Adam]

Dont need it

[marc69]

In my experince, if the timing isn't advanced at high revs, the car is somewhat held up with normal carbs, wouldn't an advance even with twin webers help performanc efurther?

[Adam]

Its a vacuum advance (i.e. only has an effect when vacuum is applied to it)
Only time it will see vacuum is engine overrun and the engine idling.
This vacuum will drop to zero(atmos) once you open the throttle and so it wont do anything at all.
It is just used to raise the idle speed slightly

The centrifugal system inside the distrubtor is what sets the actual ignition timing through the rev range.