Where would the 170 six, NON-loadomatic dizzy single vacuum go for NON-SCV autolite 1100?

[cgarriock]

Can anyone tell me specifically where the vacuum for the distributor advance should be connected for 170 ci setup for say a 68-70, after the loadomatic/ scv carb was phased out? I have a non-SCV autolite 1100 and a vacuum + mechanical advance distributor. Where would the timing advance diaphram vacuum hose been connected at production for this carb-dizzy configuration, assuming there was such a thing ? Many thanks in advance!

 

[Broncobowsher]

Typically it connects to ported vacuum. There should be a vacuum port that does NOT have vacuum at idle. Port goes to a passage that goes just above the closed throttle blade. I don't know the 1100 well enough to tell you where it goes.

 

[73azbronco]

This^^^ OEM was a brass line. My first motor was a 170, I think it was on passenger side of carb plate. But I can't remember...

 

[DirtDonk]

And I don’t know the 1100 either, but it is typically located physically slightly above any other vacuum ports.
I don’t think this is 100% true of all carburetors, but it is relatively common for the ported fitting to be located slightly higher on the carb body.

 

[okie4570]

That's on a 9/65' built u14 with either the original equipment or replaced with the original style equipment.

 

[Broncobowsher]

That's on a 9/65' built u14 with either the original equipment or replaced with the original style equipment.

View attachment 911655

That looks like a Load-o-matic version of the carb, not compatible with the newer mechanical/vacuum advance distributor.

50s to roughly mid 60s Ford had its own weird advance mechanism. Using venturi vacuum (like a vacuum secondary carburator) and manifold vacuum, controlled by a funky valve built into the carburator (looks like a Holley power valve, see above) different levels of vacuum go to the advance can on the distributor. That vacuum advance isn't just moderate cruise economy improvment like the newer ones (what is being put on). That vacuum advance does ALL of the ignition advance. What we know as centifical advance, Ford was doing by sensing venturi vacuum. The two systems are not compatible with each other. The load-o-matic vacuum signals are all wrong for a non-load-o-matic distributor.

 

[Bajabrewer]

I've only messed with the SCV 1100's but I guessed a Mustang with a 200 might have a NON SCV 1100 so I did a search & found this diagram on a mustang site. It pulls manifold vacuum thru a "Distributor vacuum control valve" for one port and the carb vacuum for the other port on a dual vacuum dizzy. Hope this helps or at least moves you in the right direction...

https://www.concoursmustang.com/forum/index.php?topic=26819.0

 

[cgarriock]

I've only messed with the SCV 1100's but I guessed a Mustang with a 200 might have a NON SCV 1100 so I did a search & found this diagram on a mustang site. It pulls manifold vacuum thru a "Distributor vacuum control valve" for one port and the carb vacuum for the other port on a dual vacuum dizzy. Hope this helps or at least moves you in the right direction...

https://www.concoursmustang.com/forum/index.php?topic=26819.0

View attachment 911657

Thanks very much