Carburetors for old Dodge Trucks : DODGE TRUCKS 1939 1940Previous | Home | Next |
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Page 4
CARBURETER SPECIFICATIONS
1939-1940 DTA I -DTA2-DTB I
1939-1940
ETN I -ETN2-ETP2-ETR I -ETR I R
DIMENSIONS:
Flange size-S.A.E 1/2„ 1/2"
Throttle bore _ 1-9/16" (39.69mm) 1-11/16" (42.86mm)
Main venturi 11/4" (31.75 mm) 1-9/32" (32.54 mm)
FLOAT SETTING 5/64" (1.98 mm) 5/64" (I.98.mm)
BOWL VENT: .218" (5.54mm) .218" (5.54mm)
Inside (Balanced Vent)-Size
GASOLINE INTAKE
Needle: Triangular, Horizontal. Hole in needle
seat. Drill size
44 (2.18 mm) 44 (2.18 mm)
IDLE ORIFICE TUBE: .0276" (.70 mm) .0276" (.70mm)
Jet size .--_.. .
Idle air bleed (in body), Size .067" (1.70 mm) .063" (1.60 mm)
Idle restriction (in body), Size .053"-.054" (1.35-1.37 mm) .049" (1.25
mm)
IDLE PORTS (Keyhole Type): .160" (4.06 mm) .128" (3.25 mm)
Upper port-length
Upper port-width _ .030" (.76 mm) .027" (.69 mm)
Upper port-diameter hole at top .045" (1.14 mm) .063" (1.60 mm)
Top of port above edge of valve .118"-.I22" (3.00-.3.10 mm) .088"-.092" (2.24-2.34
mm)
Lower port (for idle adjusting screw) .053"-.057" (1.35-1.45 mm) .053"-.057" (1.35-1.45
mm)
IDLE ADJUSTMENT SCREW Turns open
MAIN METERING JET: C. C. flow per minute
I/2 to 1¼ 254-258
1/2 to 1¼ 268-272
VENT TUBE: Through diffuser (air bleed inside
bowl), size .0315" (.80mm) .0315" (.80mm)
MAIN VENT TUBE: 5/16" (7.94mm) 5/16" (7.94mm)
Side holes:
(2 holes .0354" [.90 mm] from end)
(2 holes .0354" [.90 mm] from end) I" (25.40 mm) I" (25.40 mm)
(2 holes .0354" [.90 mm] from end) 11/2" (38.10 mm)
STEP-UP JET: Drill size .63" (.94 mm) .63" (.94 mm)
ACCELERATING PUMP:
Delayed Action Type-
Seasonal Adjustment, Pump intake size
.115"-.120" (2.93-3.05 mm) .115"-.120" (2.93-3.05 mm)
Pump discharge-restriction (under ball check), .062"-.065" (1.58-1.65
mm ) .062"-.065" (1.58-1.65 m m )
size
Pump jet-discharge size .0315" (.80mm) .0374" (.95 mm)
PUMP ADJUSTMENT ---- 24/64" (9.52 mm) 26/64" (10.32 mm)
VACUUM SPARK PORT: 035"-.041" (.89-1.04 mm)
Bottom of port, distance above valve .003"-.009" (.076-.229 mm)
ETP2-R I -ETR I R
Horizontal slot (round end) type, size x (1.016x2.794mm) 040"x.110" (I.016x2.794mm)
.040" .110"
........................ ETP2-RI-ETRIR