Vacuum advance distributor control source.

[theKbStockpiler]

Hi, I'm interested in knowing exactly how a Vacuum advance works. Is it just a diaphragm attached to a moving plate that is connected to a port inside a venturi? How is it the plate is moved while the manifold vacuum is decreasing with the RPM's increasing?

Thanks for your expertise!

[Ol'fogasaurus]

See if this helps: https://itstillruns.com/mechanical-adva ... 53424.html

Lee

[theKbStockpiler]

Thanks for the response.
I just found this webpage that spells it out instead of merely implying it.

http://newautoaa.blogspot.com/p/ignitio ... vance.html

[theKbStockpiler]

Has anyone found a solution to a spring kit to adjust the curve of a vw bosche distributor?

[oprn]

Has anyone found a solution to a spring kit to adjust the curve of a vw bosche distributor?

Yes I have. This may have come too late but I just found this thread. I modified a vacuum can to be adjustable and you can experiment with different springs. Is that what you are asking about?