Chevrolet Small Block gen. I 327 (1962)
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Home » Racing Engines » Chevrolet Small Block gen. I 327

Specifications

Chevrolet Small Block gen. I 327, V8 (90o) cyl, 4 stroke, petrol engine
Introduced in 1962
Click here and here and here and here
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5431cc, 102.3 x 82.6 mm
510 bhp / 392 KW @ 7000 rpm

Dimensions

Cylinders arrangement: V8 with 90º included angle
Strokes: 4
Bore x Stroke Capacity
101.6 x 82.55 mm (4" x 3.25") 5354cc, 327ci
102.36 x 82.55 mm (4.03" x 3.25") 5431cc, 331.6ci
102.6 x 82.55 mm (4.04" x 3.25") 5461cc, 333.3ci

Construction materials

L84: cast iron block and head
aluminum block 229.2 mm (9".025) height, 111.76 mm (4.4") bore spacing, 2 bolts for crankshaft main bearing caps
A356 Aluminum Alloy head
tufftride-hardened forged 1053-steel crankshaft with 5 main bearings 58.4 mm (2.3") diameter, 50.8mm (2") big end bearing diameter
shot peened (a stress relieving process) steel connecting rod length between centers 144.8mm (5.7"), 5/16" bolts size, pressed in wrist pin
Manganese Bronze valve guides

Cylinder-head

64cc combustion chamber
chain driven side camshaft with overhead valves (OHV). Click here
Original cam Melling cam Cam 2
Intake Valve Lift 9.9 mm - 0.390" 10.7 mm - 0.422" 11.2 mm - 0.44"
Exhaust Valve Lift 10.4 mm - 0.410" 11.3 mm - 0.444" 11.3 mm - 0.445"
Int Duration at .050" Lift 195º 204º 210º
Ex Duration at .050" Lift 202º 204º 216º

Stock valves. Click Source
327 1962-68 1.720 Intake Valves
327 1962-69 1.940 Intake Valves
327 1965-69 2.020 Intake Valves
327 Stock Stellite 1.500" exhaust valves

2 valves per cylinder - 16 valves total, 49.3 mm (1.94") inlet valve diameter, 38.1 mm (1.50") exhaust valve diameter.
1964+: 51.3 mm inlet valve diameter, 40.64 mm exhaust valve diameter
both valves on the same plane, 23 degrees valve plane angle from vertical

Aspiration

Natural with 4 x Weber Carburetors:

or 1 x Holley quad choke
or GM-Rochester Ramjet Mechanical multipoint fuel injection. Click here

Ignition

Single NGK R5671A-7 spark plug per cylinder
Firing order, 1-8-4-3-6-5-7-2
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Cooling and lubrication

Water cooled
Dry sump

Models used and Output

Year Model, Engine Induction Compression ratio Power Torque
1962 Lister Costin GM-Rochester MFI 11.25:1 360 HP @ 6000 rpm 352 ft lbs (476 Nm) @ 4000
1962 Lister Knobbly 4 x Weber 45 DCOE 11.25:1 350 HP @ 6000 rpm
1963 Chevrolet Corvette C1 L84 GM-Rochester MFI 11.25:1 360 HP @ 6000 rpm 352 ft lbs (476 Nm) @ 4000
1963 Chaparral 2A 4 x Weber 48 DCOE 11.0:1 415 bhp / 6800 rpm 380 lbs ft / 5200 rpm
1963 Chevrolet Corvette C2 L84 GM-Rochester MFI 11.25:1 360 HP @ 6000 rpm 352 ft lbs (476 Nm) @ 4000
1964 Iso Grifo A3 Corsa 4 x Weber 45 DCOE 11.0:1 405 bhp / 302 KW @ 6200 rpm 488 Nm / 360 ft lbs @ 4000 rpm
1964 Bizzarrini 5300 GT Strada 4 x Weber 45 DCOE 11.0:1 405 bhp / 302 KW @ 6200 rpm 488 Nm / 360 ft lbs @ 4000 rpm
1965 Lola T70 4 x Weber 48 IDA 10.0:1 450 HP @ 7100 rpm 400 lb-ft @ 5600 rpm
1966 Chaparral 2D 4 x Weber 48 IDM 10.0:1 420 bhp / 313 KW @ 6800 rpm
1966 Lola T70 Mk 2 4 x Weber 48 IDA 10.0:1 400 HP 400 lb-ft @ 5600 rpm
1967 Lola T70 Mk 3 GT, 5460cc 4 x Weber 48 IDA 10.0:1 510 bhp / 392 KW @ 7000 rpm
1967 McLaren M1B, 5431cc 4 x Weber 48 IDA 10.0:1 510 bhp / 392 KW @ 7000 rpm
camp-0812-02-chevy-327-trick-flow-kit-stock-block.jpg Source
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Drawings

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Weber 48 IDA carburetor

weber48IDA.jpg Carburetors Source

Drawings

SBCprintCustom2.jpg Source

Lubrication

SBOilSystem2.jpg Source
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