DFC306

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Hitachi DFC306 is an electrically controlled feedback carburetor, used on A12 engine for Sunny Truck beginning October 1989.

Overview

DFC306 is the carburetor on 1989-1994 JDM A12 engines. It requires a special water heated Intake Manifold.

ECU

Factory Nissan 1200 ECU controls the electronic feedback carb via input from O2 sensor.

22604-95W00
FBM-N13
<4-digit serial number>

ECU Control

ECU takes input signals from engine including water temp and O2 sensor and adjust the air/fuel mixture via the carburetor solenoid.

Carburetor electrical connector includes the automatic choke wire and Feedback Solenoid wires

Specifications

Model: DFC306-26
Air horn entrance (inside diameter - outside diameter) 54-59 mm
Primary nozzle system (primary) secondary side (secondary)
Zenith Stromberg protruding type
Throttle Bore (mm) 26/30
Venturi (mm) 23/27
Venturi in diameter (inner - outer diameter) (mm) - 13-16
Venturi small diameter (inner - outer diameter) (mm) 8-16 7-10
Nozzle diameter (inner diameter - outside diameter) (mm) 2.1-3.0 2.8-4.0
92 main jet size 120 (# engraved)
Diameter 43 80 slow jet (# engraved)
Economizer diameter bleed 95 140 (# engraved)
90 main jet diameter correction (# engraved) -
Slow diameter air bleed correction for 230 (# engraved) -
Main air bleed size 70 60 (# engraved)
155 slow air bleed size 80 (# engraved)
All 閉角 degree throttle valve 9 20 (degrees)
Float chamber fuel pressure (kg/cm2) 0.24
Float level standard (from the top of the float chamber) (mm) 21
Idle port (mm) 1.6
Opening fast idle (dimension G) 1.35 (0.84) (degrees)
Auto choke choke system
Two-stage diaphragm complete explosion
爆開 complete degree automatic choke at low temperatures 
* (dimension R) 25 (1.66) (degrees)
At high temperatures 33 (2.48) (degrees)
Choke set temperature (℃) 16

Manifold

Water-heated carburetor requires a special manifold.

1989-up Datsun 1200 manifold with extended-length carb flange

Applications

DFP306-5

DFC306-3  16010-11M07 Nissan B11 Sunny E15S.MT-(GL,LT).F5 8410-8412
DFC306-3A 16010-11M08 Nissan B11 Sunny E15S.MT-(GL,LT).F5 8412-
DFC306-4  16010-12M07 Nissan N12 Pulsar E15S.AT 8403-8412, B11 E15S.AT 8410-8412
DFC306-4A 16010-12M08 Nissan N12 Pulsar E15S.AT 8412-8604, B11 E15S.AT 8412-
DFC306-4B 16010-12M09 Nissan N12 Pulsar E15S.AT 8604-
DFC306-46 16010-19B00 Nissan K10 Micra K10 MA12S (MT.F5)

Vanette

C22 Vanette used a feedback carburetor.