Keep A/C after 3x Weber swap. Where Vacuum connector, Fast Idle Actuator connect?

[tamo3]

Hi,

I'd like to keep factory AC even after swapping fuel injection to triple weber.

I could not find any documentation about how to.

Does anyone keep factory AC with triple weber with canon intake?

Thanks,

tamo3

[240260280z]

With the weber you may end up setting your idle to 1000rpm so it would already be relatively fast and should be able to handle the AC load.

Tapping a runner for idle vacuum would be easy but setting up a fast idle with air for each runner would be similar but more complex as you will need some sort of controlled air device to leak just after the throttle valve. An alternate way would be to hook up some electromechanical system for opening the throttle at the linkage.

I'd try AC w/o the controls first to see if it affects your performance and ease of driving at idle.

[tamo3]

Thanks Blue for your input.

I have no clue how it affect if I did not connect.

I will try once my car is up on running condition...

Still working on body paint...

[240260280z]

good luck!

[Chickenman]

If you've kept the factory AC plastic vacuum reservoir tank and the FICD & A/C magnetic vacuum valves it should be easy. The Vacuum tank has a one way check valve in the line just before the Tank ( underneath the relay cover ). Just connect the AC vacuum feed line to one of the legs on the Cannon manifold. That will cover your vacuum operated Heater/AC dash pots.

 

If the manifold does not have a vacuum port, drill and tap one for a 1/8th pipe thread. The heavy pulsation of connecting a vacuum source to one leg on an ITB manifold does not matter in this case because the Vacuum tank will act as an accumulator and the 1 way check valve will prevent vacuum from draining from the tank. ITB manifolds will actually pull a very strong vacuum signal...but with pulses. This tends to screw up a distributor vacuum advance which is connected directly to a manifold leg, but should not affect the Factory AC vacuum reservoir system because of the Reservoir tank. To run a Vacuum advance properly with Triples, you have to build a manifold log to dampen the fluctuations. .

 

If you find that you need an AC throttle kicker, it might be best to toss the factory Vacuum dash-pot kicker and utilize an electric solenoid that extends when 12 volts is applied. You can easily splice that into the AC clutch 12 v line and fabricate a bracket for the Triples. Modify the main linkage rod with a Tab, so that solenoid " kicks " the main throttle rod when the AC comes on.