Help with vacuum to dizzy

[aahsac]

My 69 Falcon 200ci isn't vacuumed correctly and I don't think I have any advance action.

The hose from the inner vacuum tap goes to what I believe to be the distributer vacuum control valve located in the thermostat housing. There are no other taps or connection on the control valve, it appears to have had the other nipple(s) broken off and siliconed over.
The hose to the outermost hose goes from the distributer to the carb.

There are no connections to manifold vacuum and I can't find a intake manifold tap to pick up vacuum, it's a D7 head.

My question are:
can I skip the vacuum control valve altogether
Can I run a hose directly from the inner diaphragm to the carb, and
run a hose from the outer diaphragm to the manifold
And finally, any idea where to pick up manifold vacuum?

Thanks in advance.
Stephen

 

[66 Fastback]

The vacuum switch tee was used as another emission control device. It was used in conjunction with the dual vacuum advance canister on the distributor. While the engine was warming up, it sent full manifold vacuum to the retard side of the distributor canister. This retarded the spark advance resulting in higher combustion temperatures which had the effect of warming up the engine faster and burning some of the otherwise unburned hydrocarbons during the warm-up period. Once the engine coolant was warm, the vacuum switch closed off the manifold vacuum port signal at the tee, and very little or no vacuum was sent to the retard side of the vacuum canister. Simon posted a nice drawing of the vacuum tee hookup on this thread, but I do not think the picture is there any longer.
http://fordsix.com/forum/viewtopic.php? ... uum+switch
You do not need the thermostatic control valve on the thermostat housing and you do not need to hook up the retard side of the distributor vacuum motor to anything. Just connect the advance side to the carb. If the carb has a couple of vacuum ports, I would use the one that supplied manifold vacuum as opposed to ported vacuum. Manifold vacuum sources will provide a more stable idle and cooler idle temperatures.
Doug

 

[CZLN6]

Howdy Stephen:

I'm assuming that you have the stock '69 Autolite 1100 non-SCV carb???? Is this the stock OEM '69 distributor too? If so, ignore the thermo housing distribution switching junction an hook the outer vacuum line to the ported vacuum tap on the carb. Leave the inner nipple on the vacuum cannister unhooked and unused.

The inner nipple is a vacuum retard source for a poorly designed EPA stuff. You do not plug it as it becomes an air chamber that restricts the diaphrams movement inside. The outer nipple receives a ported vacuum signal to the distributor which is correct.

IF you have the Carter YF carb, standard for the D7 head, the hook-up is the same.

Either way, you would benefit from a little more initial advance then stock specs call for.

Adios, David

 

[aahsac]

Thanks for the input.

I am running the stock Autolite and distributer. I'm trying to get the car to run a little better. This car sat in a garage for over 30 years. It seems the more I drive it the better it behaves. The low oil pressure at idle on a hot motor continues to improve and the power is getting a little better. The bad miss from a stuck lifter is improving with milage. I will go to a DS II soon but I want to make sure I have a stable baseline with the current carb and distributer.

My chief complaint now is that it has the opposite of a bog. It is great coming off idle but then immediately flattens out. It does not like RPM at all. i have replace the fuel filter and I run carb cleaner with every 10 gallons of gas I put in. I suspect no centrifugal advance.

Thanks again.

 

[66 Fastback]

Your suspicions of the centrifugal advance sounds justified. My 66 was doggy and it turned out the Load-a-matic that I had was not functioning.

You may also need to verify that the outer ring of the harmonic balancer has not slipped. Check that the timing mark coincides with TDC of the #1 cyl. If your base timing is off because of a a bad reference timing mark, it may explain the poor performance.
Doug