Ford has been installing electronic fuel injection on Mustangs for the past 26 years. Carbureted Mustangs encompass the rest of the marque's 45-year history - some 21 years of production - which means there were a lot of Mustangs built with old-fashioned carbureted induction. The last Mustang with a carburetor was the '85 Mustang GT, which was fitted with a "no-tamper" Holley 4180.When the Mustang was introduced on April 17, 1964, there weren't many carburetor types. In fact, all were Autolites. What was used depended upon engine type, automatic versus manual transmission, and where the vehicle was delivered. There wouldn't be a Holley carburetor until 1967 when the popular performance carb saw duty on the 390 High Performance for a short time.
Carburetor identification...
Carburetor identification begins with the identification tag. Pony Carburetors' Ford Carburetor Guide shows the three basic types of identification tags. Carburetor body markings provide additional information. Venturi size is cast into each carburetor body, providing further information.
If you have a mainstream Mustang with a dime-a-dozen Autolite 2100 two-barrel, the news is generally good-and it won't cost you a fortune.
This is the Autolite 1100...
This is the Autolite 1100 carburetor from Pony Carburetors. For roughly the same amount of money you would spend at a discount auto parts store, you get a pristine rebuilt, restored, and engineered carburetor for your Mustang classic.
The Autolite 1100 one-barrel carburetor was offered on the 170 and 200ci sixes from '63-'69. There were three venturi sizes - 1.00-, 1.10-, and 1.20-inches. Mustangs had either 1.10- or 1.20-inch depending on model year and configuration. Basic bore size was 17/16-inches. Understanding how the 1100 works takes some imagination, but it isn't much different than any other one-barrel carburetor of the era. What makes it different is how it interacts with the ignition system. The '63-'67 1100 carburetor has a spark control valve (identical to a Holley/Autolite/Motorcraft power valve) which was not used on '66-'67 California emissions or '68-'69 50-state 1100 carburetors. The spark control valve was used in conjunction with the Autolite single-point Load-O-Matic distributor. This distributor did not have a mechanical advance; instead it used venturi vacuum (throttled vacuum) at higher engine rpm.The '67 1100 carburetor came...
The '67 1100 carburetor came with both an accelerator pump (opposite side) and anti-stall dashpot, which reduces stall risk during sudden stop braking with automatic transmission.
If your six-cylinder Mustang struggles with hesitation, stumbling, and hot starting problems, you're not alone because this is an inherent design flaw in the 1100 carburetor. Pony Carburetors has managed to engineer this problem out of its rebuilds. However, other performance issues remain. For one thing, the 170 and 200ci sixes have an integral log-style intake manifold and cylinder head, making it impossible to achieve uniform fuel distribution to all six cylinders. Cylinders 1 and 6 don't get adequate fuel distribution, resulting in unpredictable idle and stumble on acceleration.
The 1100 carburetor has the same kind of automatic choke found on 2100/4100 carburetors-an exhaust manifold-heated thermostatic coil with vacuum-induced choke unloader to reduce cold-start emissions and spark plug fouling. Six-cylinder Mustangs were never produced with a manual choke.