Autolite 1100 carb question.

[thewallyllama]

Just a quick background. I recently bought a 63 falcon that im starting to restore. Its also my daily driver too. Last few weeks i've had some issues with the autolite 1100 carb. (170cu in) I bought a second carb just to have a spare if i should need one. While comparing the new carb to old carb i noticed two holes that are different sizes on both carbs. There is a small hole beside the groove that the pump springs sit in. What size should they be? On the old carb: acc pump side is .028 and dashpot side the hole is .026. Yet on the new rebuilt carb two holes are .012 on both sides. Is there a standard size for those holes? Just curious since the rebuilt carb wont work right at all. Car just stumbles and stalls out when it finally cranks up. I have not been able to find any info on hole sizes just basic expanded pics of the rebuild which dont have what im looking for.

 

[wsa111]

I will be going through a 1100 tomorrow afternoon & i will check out your request. Bill

 

[thewallyllama]

That would be great. Thanks!!

 

[wsa111]

Both of these brass inserts are .015" in diameter. This 1100 is a 66-67 era carb with the small throttle bore. However the plastic venturi is one from a 223" six. Its diameter is 1.312"
On the carb with .024-.028 I would solder them closed & then redrill them to .015".
The carb with .012" could be left as is if no problems are present on the accelerator side.
If the dashpot causes the idle speed to not bleed down fast enough I would drill that one out to the .015" area. Bill

 

[thewallyllama]

Thanks for the info. I figured the first carb had been modified in some way.