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| Tune Up Specs | |
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| Chevrolet 1931 |
No.
of Cyl. |
Bore and Stroke | Valve Timing | Operating Tappet Clearance | ||||||
| Inlet degree-TC | Inlet
Opens Flywheel Teeth-TC |
Inlet Tappet Gap |
Inlet (Ins.) | Exhaust (Ins.) | ||||||
| 6 | 3-5/16 x 3-3/4 | 4A | 1A | .010 | .006H | .008H | ||||
| Ignition Timing | ||||||||||
| Coil draw eng. stopped | Spark
Plug Gap (Ins.) |
Breaker
Point Gap (Ins.) |
Sparks
Occurs degree TC |
No.
of Flywheel Teeth Spark Occurs TC |
Breaker Housing |
|||||
| 3 amp | .025 | .030 | TC | TC | Ret. | |||||
| Front Axle | Piston Ring Size | |||||||||
| Total
Caster (degree) |
Wheel
Cam (deg.) 1 WH. |
Wheel
Camber (Ins.) 1 Wheel |
Toe
in (Ins.) |
Compression Width |
Oil
Control Width |
|||||
| 5/32 | 5/32 | |||||||||
| Spark Plugs | Mazda Lamp Number (base S.C. except as noted) 6-8 volts | |||||||||
| Original | Modern | Headlight | Cowl | Tail Light | Instrument | |||||
| C86 | 1110 (base S.D.) | 63 | 63 | 63 | ||||||
| Chevrolet UNI. AD 1930 |
No.
of Cyl. |
Bore and Stroke | Valve Timing | Operating Tappet Clearance | ||||||
| Inlet degree-TC | Inlet
Opens Flywheel Teeth-TC |
Inlet Tappet Gap |
Inlet (Ins.) | Exhaust (Ins.) | ||||||
| 6 | 3-5/16 x 3-3/4 | 4A | 1A | .010 | .006H | .008H | ||||
| Ignition Timing | ||||||||||
| Coil draw eng. stopped | Spark
Plug Gap (Ins.) |
Breaker
Point Gap (Ins.) |
Sparks
Occurs degree TC |
No.
of Flywheel Teeth Spark Occurs TC |
Breaker Housing |
|||||
| 3 amp | .025 | .030 | TC | TC | Ret. | |||||
| Front Axle | Piston Ring Size | |||||||||
| Total
Caster (degree) |
Wheel
Cam (deg.) 1 WH. |
Wheel
Camber (Ins.) 1 Wheel |
Toe
in (Ins.) |
Compression Width |
Oil
Control Width |
|||||
| 5/32 | 5/32 | |||||||||
| Spark Plugs | Mazda Lamp Number(base S.C. except as noted) 6-8 volts | |||||||||
| Original | Modern | Headlight | Cowl | Tail Light | Instrument | |||||
| C86 | 1110 (base S.D.) | 63 | 63 | 63 | ||||||
| Chevrolet Inter. AC 1929-30 |
No.
of Cyl. |
Bore and Stroke | Valve Timing | Operating Tappet Clearance | ||||||
| Inlet degree-TC | Inlet
Opens Flywheel Teeth-TC |
Inlet Tappet Gap |
Inlet (Ins.) | Exhaust (Ins.) | ||||||
| 6 | 3-5/16 x 3-3/4 | 4A | 1A | .010 | .006H | .008H | ||||
| Ignition Timing | ||||||||||
| Coil draw eng. stopped | Spark
Plug Gap (Ins.) |
Breaker
Point Gap (Ins.) |
Sparks
Occurs degree TC |
No.
of Flywheel Teeth Spark Occurs TC |
Breaker Housing |
|||||
| 3 amp | .025 | .021 | TC | TC | Ret. | |||||
| Front Axle | Piston Ring Size | |||||||||
| Total
Caster (degree) |
Wheel
Cam (deg.) 1 WH. |
Wheel
Camber (Ins.) 1 Wheel |
Toe
in (Ins.) |
Compression Width |
Oil
Control Width |
|||||
| 3-1/2 | 1-1/2 | 1/2 | 5/32 | 5/32 | ||||||
| Spark Plugs | Mazda Lamp Number(base S.C. except as noted) 6-8 volts | |||||||||
| Original | Modern | Headlight | Cowl | Tail Light | Instrument | |||||
| C86 | 1110 (base S.D.) | 63 | 63 | 63 | ||||||
| Chevrolet Nat. AB 1928 |
No.
of Cyl. |
Bore and Stroke | Valve Timing | Operating Tappet Clearance | ||||||
| Inlet degree-TC | Inlet
Opens Flywheel Teeth-TC |
Inlet Tappet Gap |
Inlet (Ins.) | Exhaust (Ins.) | ||||||
| 4 | 3-11/16 x 4 | NA | NA | .006H | .008H | |||||
| Ignition Timing | ||||||||||
| Coil draw eng. stopped | Spark
Plug Gap (Ins.) |
Breaker
Point Gap (Ins.) |
Sparks
Occurs degree TC |
No.
of Flywheel Teeth Spark Occurs TC |
Breaker Housing |
|||||
| .023 | .019 | TC | TC | Ret. | ||||||
| Front Axle | Piston Ring Size | |||||||||
| Total
Caster (degree) |
Wheel
Cam (deg.) 1 WH. |
Wheel
Camber (Ins.) 1 Wheel |
Toe
in (Ins.) |
Compression Width |
Oil
Control Width |
|||||
| 3-1/2 | 1-1/2 | 1/2 | NA | 5/32 | 5/32 | |||||
| Spark Plugs | Mazda Lamp Number(base S.C. except as noted) 6-8 volts | |||||||||
| Original | Modern | Headlight | Cowl | Tail Light | Instrument | |||||
| C77 | 1129 | 63 | 63 | 63 | ||||||
| Chevrolet Cap. AA 1927 |
No.
of Cyl. |
Bore and Stroke | Valve Timing | Operating Tappet Clearance | ||||||
| Inlet degree-TC | Inlet
Opens Flywheel Teeth-TC |
Inlet Tappet Gap |
Inlet (Ins.) | Exhaust (Ins.) | ||||||
| 4 | 3-11/16 x 4 | 16A | 5A | .006H | .008H | |||||
| Ignition Timing | ||||||||||
| Coil draw eng. stopped | Spark
Plug Gap (Ins.) |
Breaker
Point Gap (Ins.) |
Sparks
Occurs degree TC |
No.
of Flywheel Teeth Spark Occurs TC |
Breaker Housing |
|||||
| .027 | .018 | TC | TC | Ret. | ||||||
| Front Axle | Piston Ring Size | |||||||||
| Total
Caster (degree) |
Wheel
Cam (deg.) 1 WH. |
Wheel
Camber (Ins.) 1 Wheel |
Toe
in (Ins.) |
Compression Width |
Oil
Control Width |
|||||
| 3-1/2 | 1-1/2 | 1/2 | 3/16 - 5/16 | 3/16 | ||||||
| Spark Plugs | Mazda Lamp Number(base S.C. except as noted) 6-8 volts | |||||||||
| Original | Modern | Headlight | Cowl | Tail Light | Instrument | |||||
| C77 | 1129 | 63 | 63 | 63 | ||||||
| Chevrolet Ser. V 1926-27 |
No.
of Cyl. |
Bore and Stroke | Valve Timing | Operating Tappet Clearance | ||||||
| Inlet degree-TC | Inlet
Opens Flywheel Teeth-TC |
Inlet Tappet Gap |
Inlet (Ins.) | Exhaust (Ins.) | ||||||
| 4 | 3-11/16 x 4 | 16A | 5A | .006H | .010H | |||||
| Ignition Timing | ||||||||||
| Coil draw eng. stopped | Spark
Plug Gap (Ins.) |
Breaker
Point Gap (Ins.) |
Sparks
Occurs degree TC |
No.
of Flywheel Teeth Spark Occurs TC |
Breaker Housing |
|||||
| .025 | .020 | TC | TC | Ret. | ||||||
| Front Axle | Piston Ring Size | |||||||||
| Total
Caster (degree) |
Wheel
Cam (deg.) 1 WH. |
Wheel
Camber (Ins.) 1 Wheel |
Toe
in (Ins.) |
Compression Width |
Oil
Control Width |
|||||
| 3-1/2 | 2-1/2 | 3/16 - 5/16 | ||||||||
| Spark Plugs | Mazda Lamp Number(base S.C. except as noted) 6-8 volts | |||||||||
| Original | Modern | Headlight | Cowl | Tail Light | Instrument | |||||
| C77 | 1129 | 63 | 63 | 63 | ||||||
| Chevrolet Sup K 1925-26 |
No.
of Cyl. |
Bore and Stroke | Valve Timing | Operating Tappet Clearance | ||||||
| Inlet degree-TC | Inlet
Opens Flywheel Teeth-TC |
Inlet Tappet Gap |
Inlet (Ins.) | Exhaust (Ins.) | ||||||
| 4 | 3-11/16 x 4 | 16A | 5A | .008H | .010H | |||||
| Ignition Timing | ||||||||||
| Coil draw eng. stopped | Spark
Plug Gap (Ins.) |
Breaker
Point Gap (Ins.) |
Sparks
Occurs degree TC |
No.
of Flywheel Teeth Spark Occurs TC |
Breaker Housing |
|||||
| .025 | .020 | TC | TC | Ret. | ||||||
| Front Axle | Piston Ring Size | |||||||||
| Total
Caster (degree) |
Wheel
Cam (deg.) 1 WH. |
Wheel
Camber (Ins.) 1 Wheel |
Toe
in (Ins.) |
Compression Width |
Oil
Control Width |
|||||
| 3-1/2 | 2-1/2 | 3/16 - 5/16 | ||||||||
| Spark Plugs | Mazda Lamp Number(base S.C. except as noted) 6-8 volts | |||||||||
| Original | Modern | Headlight | Cowl | Tail Light | Instrument | |||||
| C77 | 1129 | 63 | 63 | 63 | ||||||
| Chevrolet Sup. F 1925 |
No.
of Cyl. |
Bore and Stroke | Valve Timing | Operating Tappet Clearance | ||||||
| Inlet degree-TC | Inlet
Opens Flywheel Teeth-TC |
Inlet Tappet Gap |
Inlet (Ins.) | Exhaust (Ins.) | ||||||
| 4 | 3-11/16 x 4 | 16A | 5A | .008H | .010H | |||||
| Ignition Timing | ||||||||||
| Coil draw eng. stopped | Spark
Plug Gap (Ins.) |
Breaker
Point Gap (Ins.) |
Sparks
Occurs degree TC |
No.
of Flywheel Teeth Spark Occurs TC |
Breaker Housing |
|||||
| .025 | .020 | TC | TC | Ret. | ||||||
| Front Axle | Piston Ring Size | |||||||||
| Total
Caster (degree) |
Wheel
Cam (deg.) 1 WH. |
Wheel
Camber (Ins.) 1 Wheel |
Toe
in (Ins.) |
Compression Width |
Oil
Control Width |
|||||
| 3-1/2 | 2-1/2 | 3/16 - 5/16 | ||||||||
| Spark Plugs | Mazda Lamp Number(base S.C. except as noted) 6-8 volts | |||||||||
| Original | Modern | Headlight | Cowl | Tail Light | Instrument | |||||
| C77 | 1129 | 63 | 63 | 63 | ||||||
Abbreviations: H= Hot Ret. = Retarded NA = Not Adjustable TC= Top Center
