Chrysler Hemi Fire Power 331 (1951)

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Chrysler Hemi Fire Power 331 genereation I, V8 (90o) cyl, 4 stroke, petrol engine
Introduced in 1951
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Cylinders arrangement: V8 with 90ยบ included angle
Strokes: 4
Bore x Stroke: 96.8375 x 92.075 mm (3.8125" x 3.625")
Capacity: 5425.1 cc, 331ci

Construction materials

cast iron block, "low deck" 263.9mm (10.39") deck height, cast bell housing in the back of the block, bore spacing 115.9mm (4.5625")
forged steel cross plane crankshaft with 5 main bearings 63.5mm (2.5") diameter and 57.15mm (2.25") big end bearing diameter
connecting rod length between centers 168.3mm


1 side camshaft (OHV), 2 valves / cyl - 16 valves total
46mm inlet valve diameter, 38.1mm exhaust valve diameter
9.5mm stem diameter, 127.8mm valves length.
Dual valve springs
Intake/Exhaust manifold flanges


4 x dual-throat downdraft Zenith DD carburetors


Firing Order: 1-8-4-3-6-5-7-2, (front to rear: Right bank 2-4-6-8, left bank 1-3-5-7)
6V battery
130 Amp/Hrs capacity
Autolite Coil for ignition

Cooling and lubrication

Water cooled 25 Imp. Quarts Water Capacity
wet sump, 7 Imp. Quarts Oil Capacity

Models used and Output

Year Model, Engine Induction Compression ratio Power Torque
1951 Allard J2 2 x Zenith DD carbs 7.5:1 250 hp / 184 kW @ 5000 rpm
1952 Cunningham C4R 4 x Zenith DD carbs 7.5:1 300 hp / 221 kW @ 5200 rpm
1953 Cunningham C5R 4 x Zenith DD carbs 7.5:1 300 hp / 221 kW @ 5200 rpm


1954-Chrysler-Hemi-331.jpg Source
0810sr_15_z%2b331_chrylser_hemi_engine%2bclearances_checking_out.jpg Source
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1.headback.jpg Source
hrdp-1206-the-early-hemi-guide-of-death-019.jpg Source


hemib1.jpg Source
hemit1.jpg Source
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Oil system
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