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ENGINE SPECS

1957 Chevrolet 283 (250 hp) V8 Engine Specs

GENERAL SPECIFICATIONS

Model Designation: 150, 210 & Bel Air with fuel injection

Wheel base: 115

Valve Location: In head

Bore and Stroke: 3.875 x 3.000

Piston displacement, Cubic Inches: 283

Compression ratio: fuel injection: 9.5

Maximum Brake Horsepower: fuel injection: 250 @ 5000 RPM

Maximum Torque Lbs.Ft. @ RPM: fuel injection: 305 @ 3800 RPM

Normal Oil Pressure Pounds: 35

TUNE UP SPECIFICATIONS (all models)

Spark Plug Make: AC 44

Spark Plug Gap, Inch: .035

Firing Order: 18436572 (front to rear left bank: 1-3-5-7, right bank: 2-4-6-8)

Timing Mark: Second line before "0" on timing tab on front cover; Location: Damper

Engine Idle Speed, RPM:  425

Compression Pressure & Cranking Speed: 150 min.

Voltage & Polarity: 12 volts, negative ground

PISTON AND RING SPECIFICATIONS

Fitting Pistons with Scale: Pistons removed from above. Shim thickness: .0015

Pounds on a Pull Scale: 7-18

Ring End Gap: In tapered bores, fit rings in tightest portion of ring travel
Compression: .009
Oil: .005

Wristpin Diameter, Inch: .9271

VALVE SPECIFICATIONS

Operating Clearance:
     w/mechanical valve lifters: Intake: .012 Hot   Exhaust: .012 Hot
    w/hydraulic valve lifters: Intake: 0 Exhaust: 0

Valve Seat Angle, degrees: 45

Valve Timing: (BTDC = before top dead center; ATDC = after top dead center)
         w/ mechanical valve lifters: Intake opens: 35 BTDC  Exhaust Closes: 31 ATDC

         w/hydraulic lifters: Intake opens: 12-1/2 BTDC Exhaust Closes: 15-1/2 ATDC

Valve Spring Pressure Pounds at Inches Length:
    Inner Spring: 69 @ 1.696

Valve Lift Zero Lash: Intake: .398 Exhaust: .398

Stem Diameter: Intake: .3415-.3422 Exhaust: .3410-.3417

Valve Stem Clearance: Intake: .001-.003; Exhaust: .0015-.003

ENGINE BEARING SPECIFICATIONS

Connecting Rod Bearings:
    Journal Diameter, Inches: 1.999-2.000
    Bearing Clearance, Inch: .001-.003

Main Bearings:
    Journal Diameter, Inches: 2.2978-2.2988
    Bearing clearance: .001-.003
    Shaft End Play: .002-.006    (Thrust on Bearing 5)

CAPACITY DATA

Cooling System:
    Without heater: 16 quarts
    With heater: 17 quarts

Fuel Tank: 16 gallons

Engine Oil: 4 quarts + 1 quart for filter change

Transmission: Standard: 2 pints; w/overdrive: 3 pints; Automatic: 3-1/2 quarts

Rear Axle: 3-1/2 pints

Other 1957 Chevrolet engine specs

1957 Chevrolet 283 (250 hp) V8 Engine Specs

1957 Chevrolet 283 (250 hp) V8 Engine Distributor Specs

1957 Chevrolet 283 (250 hp) V8 Engine Generator Specs

1957 Chevrolet 283 (250 hp) V8 Engine Regulator Specs

1957 Chevrolet 283 (250 hp) V8 Engine Starting Motor Specs

1957 Chevrolet 283 (250 hp) V8 Engine Tightening Specs

1957 Chevrolet Wheel Alignment Specs


Other 1957 Chevrolet V8 Engine Options

1957 Chevrolet 265 (162 hp) V8 Engine Specs

1957 Chevrolet 283 (185 hp) V8 Engine Specs

1957 Chevrolet 283 (220 hp) V8 Engine Specs

1957 Chevrolet 283 (245 hp) V8 Engine Specs

1957 Chevrolet 283 (270 hp) V8 Engine Specs

1957 Chevrolet 283 (283 hp) V8 Engine Specs

Return to Chevrolet Engine Specs Index