GM 6.6L L8T Specs
Engine: |
6.6L L8T V-8 |
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Manufacturer: |
General Motors |
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Applications/Production Years: |
2020+ Chevrolet Silverado 2500 HD/3500 HD |
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Production/Assembly Plant(s): |
Tonawanda Engine Plant, Buffalo, New York |
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Displacement: |
400.55 CID (400 CID nominal), 6.56 liters (6.6 liters nominal) |
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Configuration: |
V-8 |
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Bore: |
4.065 in (103.25 mm) |
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Stroke: |
3.858 in (98.0 mm) |
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Bore/Stroke Ratio: |
1.05 (slightly oversquare) |
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Compression Ratio: |
10.8 : 1 |
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Firing Order: |
1 - 8 - 7 - 2 - 6 - 5 - 4 - 3 |
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Engine Block Material: |
Cast iron |
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Cylinder Head Material: |
Aluminum alloy |
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Intake Manifold Material: |
Composite |
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Exhaust Manifold Material: |
Cast stainless steel |
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Injection System: |
Direct injection |
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Aspiration: |
Naturally aspirated |
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Reciprocating Assembly: |
Forged steel crankshaft, bullet steel camshaft, forged powder metal connecting rods, 6 bolt cross-bolted cast nodular main bearing caps |
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Valvetrain: |
2 valves per cylinder (16 valve), Overhead valve (OHV), standard cam-in-block pushrod V-8, variable valve timing, hydraulic roller lifters, Inconel alloy exhaust valves |
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Engine Oil Capacity: |
8.0 quarts w/ filter |
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Engine Oil Spec: |
Ambient temp > -20° F |
SAE 5W-30 motor oil |
Ambient temp < -20° F |
SAE 0W-30 motor oil |
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Fuel: |
87 octane unleaded gasoline |
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Horsepower: |
401 hp @ 5,200 RPM |
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Torque: |
464 lb-ft @ 4,000 RPM |
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Max Engine Speed: |
5,600 RPM |
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Engine Dimensions: |
Length: |
29.75 in |
Width: |
26.10 in |
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Height: |
31.30 in |