Studebaker Carburetors : 1939 Studebaker Champion Model G

1939 Studebaker Champion Model G

Form 6376C—Canadian
CARTER CARBURETOR CORPORATION, ST. LOUIS, MO., U.S.A.STUDEBAKER 444S-453S
April, 1939
Reprinted March, 1946
CAR SERIAL NUMBERS
G-00001 and higher
MOTOR SERIAL NUMBERS
101 and higher
STUDEBAKER CHAMPION SIX MODEL "G" 1939

For complete replacement use carbureter 468S,
List Price $17.85, Exchange Allowance
on old carbureter $2.50.
Casting Number 229 on face of flange
WO Down-Draft Carbureters 444S-4535—List Price $ 17.65
A $2.50 exchange allowance is deducted from the list price if buyer turns in old carbureter.
CARBURETER SPECIFICATIONS
Motor Tune-Up—Be Accurate! Always Use Feeler Gauges!
CAUTION: Change worn or leaky flange gaskets. Tighten manifold bolts and test compression before adjusting carburetor.
Set Valves Correct Float Level
(Cold) (Measure from machined surface of casting )
Intake .016" 453S—¼ inch
Exhaust .016" 444S—3/8 inch CARTER SERVICE DISTRIBUTORS:
AUTO ELECTRIC SERVICE CO., Ltd., 1009 BAY ST., TORONTO, ONT.
BEATTIE AUTO ELECTRIC, Ltd., 176 FORT ST., WINNIPEG, MAN.
For Studebaker
Dimensions: Flange size, 11/4 inch S. A. E. Primary venturi, 11/32 inch I. D. Main venturi, 1.0 inch I. D.
Float Setting: Distance from float (at free end) to float chamber cover to be 3/8" on 444S; 1/4" on 453S, when needle is seated.
Vents: Outside, No. 10 drill size. Inside, none. Idle well to bowl fuel chamber No. 30 drill.
Gasoline Intake: Square vertical needle. No. 48 drill size in needle seat.
Gasoline Line Connection: 1/4 inch weatherhead elbow.
Low Speed Jet Tube: Idle well jet, No. 56 drill. Jet size, No. 69 drill.
By-pass in body, .052 inch diameter.
Economizer in body, .046-.047 inch diameter.
Idle bleed, size No. 45 drill.
Idle Port: Length, .160 inch. Width,
Idle Port Opening: .028 to .032 inch with valve tight closed. Idle Screw Seat: No. 46 drill.
Set Idle Adjustment Screw: 3/4 to
.030 inch.
(below lower edge of valve)
11/4 turns open. For richer
mixtures, turn screw out. Do not attempt to idle engine below 600 R. P. M. or 8 M. P. H. on level road.
444S-453S 6 Cylinder Engine, 3" Bore, 378" Stroke
becuum Spark Fort: )444S and early 453S) Horizontal slot (round end) type; size .050 x .160 inch. Top of port .042 to .048 inch above upper edge of valve.
Late 453S) : .1005 to .1025 inch diameter. Top of port .072 to .078 inch above top edge of valve.
Main Nozzle: In primary venturi, angle 30°. Discharge jet size, .0935 Inch diameter. Air breed in body, .026-.028 inch.
Metering Rod: Economy step, .078 inch diameter, second step tapers to .065 inch diameter. Third step tapers to .056 inch diameter. Power step, .048 inch diameter. Length, 3 25/64 inches.
Metering Rod Jet: Size, .081 inch diameter.
Metering Rod Setting: Use gauge, part No. T109-26 (2.718 inches).
Accelerating Pump: High pressure type, spring operated. Discharge jet size, No. 72 drill.
Intake ball check size, No. 40 drill.
Discharge ball check size No. 40 drill.
Relief passage to outside, size No. 42 drill.
Pump Adjustment: 12/64 inch plunger travel. Use gauge T-I09-117S.
Choke: Manual—Butterfly type, with pressure relief poppet
valve. Inter-connected to open throttle valve to fast idle
position when choke is used.
Spark Plug Gap .025"
Set
Breaker Points
.018"-.022"
Use Timing Light
Breaker Points to
Open 2°
Before Top Dead
Center
Idle Adjustment
Screw Setting
3/4 to 1¼
Turns Open
Copyright 1939
by Carter Carburetor Corporation
All Rights Reserved