American Austin & Bantam tune-up specifications & parts numbers

Last updated Sunday, August 05, 2012

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I have been wanting to do this for a long time and it's way over due.  I will be working on this page for awhile so keep checking back for changes and new information. 

You can get everything you need for a tune up at a Napa dealer or other parts stores.  Echlin is Napa but can be cross-referenced to other numbers.


Specifications: American Austin

Engine: Four cylinder "L" head type

Bore: 2.2"        Stroke: 3.0"        Displacement: 45.6 Cubic Inches (750 cc)

Developed horsepower: 13 @ 3100 rpm

Compression ratio: 5.0 to 1 (before engine number L-15038)        6.0 to 1 (after engine number L-15038)

Compression pressure ~97 pounds

Tappet clearance: .006" intake and exhaust (hot) my experience is that hot and cold settings are the same, better a little loose than too tight.

Ignition timing: ~.020" BTC measure with an indicator through the spark plug hole.  For best results at approximately 2,000-3,000 rpm, under a load (driving conditions) advance spark until the engine pings ( a warbling thudding sound) and then retard it until the pinging just goes away.  This may take some time but it is well worth the effort to achieve maximum performance.

Firing order: one, three, four, two (1-3-4-2)

Rotor turns clockwise.

1930-32 A.E.A tune-up specs.          1933-35 A.E.A tune-up specs. 


American Austin 1930-1935

Item                    Original Part Number             New Part Number            Comments

Spark Plug                Champion C-7                                    Champion D-16 or 516              Gap.025"-.030"

Points                        Auto-Lite  IGW-3028S                       Echlin CS 709                           Gap .022" new and .018" when re-adjusting

Condenser                 Auto-Lite IGB-1025                           Echlin AL-38                            .20 - .25 mfd

Cap                           Auto-Lite IGB1001                            Echlin AL-31                             Be sure caps and rotor are compatible as far as heights        

Rotor                         Auto-Lite IGB 1002                           Echlin AL-32

Coil                           Auto-Lite IGB 4065                           Echlin  EC-7

Cut Out                     Auto-Lite CB -4008 or CB 4014       Echlin CU-2 or 3 you will have to look

Starter Switch            Auto-Lite SW-4001                          Filko SW-1

Oil                             30 wt          2 1/2 qts                         Castrol GTX 5-30 or Syntec 5-30


Specifications: American Bantam 1938-39 & 1940

Engine: Four cylinder "L" head type

Bore: 2.2"        Stroke: 3.0"        Displacement: 45.61 cubic inches (747 cc) (1938-39)

Bore: 2.26"        Stroke: 3.125"        Displacement: 50.14 cubic inches (821 cc) (1940 3 main)

Developed horsepower: 20 @ 4000 rpm (1938-39)

Developed horsepower: 23 @ 4300 rpm (1940 3 main)

Compression ratio: 7.0 to 1

Compression pressure: ~90 pounds

Tappet clearance: .006" intake and exhaust (hot) my experience is that hot and cold settings are the same, better a little loose than to tight.

Ignition timing:  For best results at approximately 2,000-3,000 rpm, under a load (driving conditions) advance spark until the engine pings ( a warbling thudding sound) and then retard it until the pinging just goes away.  This may take some time but it is well worth the effort to achieve maximum performance.

Firing order: one, three, four, two (1-3-4-2)

Rotor turns clockwise.

1938 A.E.A tune-up specs.    1939 A.E.A tune-up specs.    1940 A.E.A tune-up specs. 


American Bantam 1938-1940

Same as above except list below

Item                    Original Part Number          New Part Number                 Comments

Spark Plug (1938)     Auto-Lite A-9                                  Champion 844                                 Gap.025"-.030"

Spark Plug (39-40)    Champion H-10                               Champion 844                                 Gap.025"-.030"

Oil                             30 wt          3 qts                              Castrol GTX 5-30 or Syntec 5-30   I recommend changing it frequently (100-200 miles)


Battery Information

You can get them at any good auto parts stores or a battery retail outfit,  they may have to order it for you.  MG uses two of them in series to get 12 volts.

17HF  Negative ground


General Information

Napa  #'s for materials to make an oil pan gasket
Gasket material:  rubberized cork
12"' X 36"  #32506  makes 2
18" X  36"  #32609  makes ??  more

*Firing order: one, three, four, two (1-3-4-2) and the rotor turns clockwise.* (Both Austin and Bantam)

 

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