Revolution Switch how does it work?

[essmeier]

I would like to understand what this revolution switch does. Anyone know the details of how it works? I see it has power and tach input and then a solenoid output. Does this simply trigger at a specific RPM? I tried to trace the green/violet stripe wire to find the solenoid but I have no idea where it goes or if I even have this solenoid. Anyone have a picture of a 2800cs with this connected and where the solenoid is located?

 

[HB Chris]

Looks like the Speed Relay under the coil. It controls the vacuum dashpot on the firewall that moves the diaphragm mounted near cylinder 5 or 6 on the head that slows return of the accelerator on deceleration to lower emissions.

 

[sfdon]

delete....

 

[essmeier]

Looks like the Speed Relay under the coil. It controls the vacuum dashpot on the firewall that moves the diaphragm mounted near cylinder 5 or 6 on the head that slows return of the accelerator on deceleration to lower emissions.

Thank you. Found the wires but nothing attached.

 

[HB Chris]

Dashpot they connect to is removed as is diaphragm as you now have Webers, just remove it.