Is my Dist. advanced hooked up 'wrong'?

[350kmileford]

Almost a year ago, I installed the Performance DSII distributor kit from ClassicInlines. The install went great and every has been working fair since. However, I was reading this page http://classicinlines.com/Loadomatic.asp
and it talks about not hooking up an aftermarket distributor to the venturi vacum.

You "can" install a later distributor with an 1100 carb, but the venturi advance will add vacuum advance at speed and it may be too much, since the later distributor was designed to use ported manifold vacuum only

When I installed the distributor, I simply moved the vacum line from the old dist. to the new one. I assume I have the 1100 carb ('66 mustang auto tranny?) So, is this setup incorrect?
Do I need to change the source of my vacum advance?

 

[fordconvert]

A 66 1100 would have had the SCV port rather than a 'ported' vacuum port. The SCV was a unique port to operate a unique distributor. Some people (like me) run the later model distributors (like yours and my ds2) direct off manifold vacuum. Others run another model carb that has a 'ported' vacuum port. I dont think most of the earlier 1100's had one. To get manifold vacuum on a 66 what I did was put a T in the end of the metal line that runs down to the transmission and hooked the distributor in there. Its been that way for a few years now and Im happy with the performance. Over the years the factories went back in fourth on manifold vs. ported vacuum for the distributors. Some years and models they even did both using a thermal switch based on coolant temp. It wont cost much to try it. If you dont like it you can always go back to how it is now. Just take a base timing reading before you start so you can go back to where you are now if you dont like it the other way.

 

[jamyers]

If your vacuum line is hooked to the side of an SCV carb (has the big "nut" thing on the side), then yes you need to move it.

Best place is straight manifold vacuum, in my not-so-humble opinion.

 

[Ronbo]

Guys, looking at the pictures he has posted of his carb (seem missing part post) I dont think that he has the SCV. Might be me but that looks like the beast that was on my 68 200 before I went nuts with it.

Ron

 

[sixpony]

Guys, looking at the pictures he has posted of his carb (seem missing part post) I dont think that he has the SCV. Might be me but that looks like the beast that was on my 68 200 before I went nuts with it.

Ron

Definitely not an autolite 1100, not like mine anyway, I don't see an scv either.

 

[350kmileford]

Well the previous owner did swap the transmission (and presumably) engine. When I've replaced parts, I've always used parts for a '66 auto with no issue. I'm not sure what to say about the carb.

 

[Ronbo]

You can make ported or manifold vacuum work for you. As to which is best....ehhhh, I'll just say everyone has their preferences!

Ron

 

[66200i6]

A good way to think about your vacuum source is that first of all, both connections will provide the same amount of advance "when applied".

The Ported source is "applied" just off idle or about the same time the main fuel circuit is. Just remember that at idle you "will not" have the same amount of advance and this will increase engine temps.

The Manifold source is "applied" when ever the manifold has a high vacuum reading. This source is also readily available when the Ported connection is not, like on certain types of carbs like the 1100 in question (with SCV) and even the 1940. Use of this connection at idle will usually give you a smoother idle as well.

Have fun, Ric.