This stroker kit upgrades a 5.9L 12-valve Cummins engine using a 6.7L crankshaft and pistons decked by .080″ to boost displacement and torque for towing, racing, or fun truck
Key Components:
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6.7L Crankshaft:
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Stroke: Increases from 4.72″ (5.9L) to 4.88″, adding .16″ for ~367 cubic inches (6.0L) displacement.
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Compatibility: Nearly a bolt-in for the 5.9L block, but some blocks may need minor machining to clear connecting rods due to the longer stroke, preventing rod rub on the block or camshaft. Notching the lower cylinder bore or webbing is typical.
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Custom Pistons (Decked .080″):
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Decking: Machined .080″ to adjust for increased stroke, ensuring proper clearance and compression.
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Material: Forged aluminum, with modified bowl for combustion efficiency.
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Bore: Standard or .020″/.040″ overbore for 4.02″ bore.
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Performance Benefits:
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Increased Displacement: ~6.0L enhances low-end torque for towing or competition.
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Torque Output: Longer stroke boosts torque (e.g., 1,500+ ft.-lbs. with proper setup).
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Power Potential: Supports stock to 700+ hp with turbo/fueling upgrades, though head flow may need porting. .
Notes:
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Rod/piston combos may require block clearancing. Verify with dial indicator or clay during assembly.
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Ideal for low-RPM, high-torque applications. High-RPM builds may need headwork.
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Contact Power Driven Diesel for parts, or a machine shop for clearancing.
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