1966 Mustang

1966 Mustang – Carburetor Information

1966 Ford Mustang Carburetor Information

Ford used the following carburetors in its 1966 Mustang line-up. Below we have outlined some general information on the carburetors in the 1966 Mustang as well as settings and adjustments.

General Carburetor Information

Engine & Trans Carb Carb Throttle Bore Venturi Diam Main Metering Jet Booster Venturi Pwr Valve Spark Choke
P/N Model Pri Sec Pri Sec Pri Sec Norm Alt. Valve Spring
200 1V Std C5OF-Y 1100A 1.437 1.200 69F 67F Plain TS
200 1V Auto C5OF-Z 1100A 1.437 1.200 67F 65F Plain TP
289 2V Std C6OF-A 2100A 1.437 1.145 51F 49F CG Red Plain TW
289 2V Auto C6DF-B 2100A 1.437 1.145 50F 48F CE Green Yellow TO
289 4V Std C6ZF-A 4100A 1.437 1.437 1.080 1.189 49F 58F 47F 56F M H Plain Green TN
289 4V Std HiPo C6ZF-C 4100A 1.562 1.562 1.125 1.189 52F 68F 50F 66F CF BA Plain Green
289 4V Auto C6ZF-B 4100A 1.437 1.437 1.080 1.189 48F 57F 46F 55F CH H Plain Green TO

Settings and Adjustments

Please note that Idle fuel adjustment – Initial setting all carburetors is 1 to 1.5 turns open. Idle speed setting all carburetors initial settings is 1.5 open turns.

Carb Choke Spg Choke Plate Accelerator Pump Stg Dry float setting Fuel level (wet) Fast idle Curb idle Anti stall Secondary
P/N Setting Clearance Pump lever Throttle lever Pri Sec Pri Sec RPM RPM dashpot throttle plate
C5OF-Y 1 lean 0.130-0.150 0.190 LO 1.090 1400 575-600
C5OF-Z Index 0.140-0.160 0.190 LO 1.090 1500 Hi cam 500-525 3.5 turns
C6OF-A 2 rich 0.110-0.130 Inboard 3 0.491 0,875 1600 475-500 0.060-0.090
C6DF-B 2 rich 0.110-0.130 Inboard 3 0.491 0,875 1600 475-500 0.060-0.090
C6ZF-A 2 rich 0.110-0.120 Inboard 3 0.531 0.531 0.910 0.910 1400 575-600 1 turn
C6ZF-C 0.210-0.250 Inboard 3 0.491 0.621 0.875 1.000 750-775 1 turn
C6ZF-B 0.110-0.130 Inboard 3 0.571 0.531 0.940 0.910 1600 475-500 0.060-0.090 1 turn