2017-2024 L5P Duramax
A Denso fuel system, an in-tank lift pump, a billet wheel BorgWarner VGT, and more than 900 lb-ft of torque made the L5P Duramax competitive right out of the gate.
Engine Name: 6.6L Duramax (RPO Code “L5P”)
Production Plant: DMax Ltd., Moraine, Ohio
Configuration: 90-degree V-8
Bore: 4.06-inch
Stroke: 3.90-inch
Displacement: 403 ci (6.6L)
Compression Ratio: 16.0:1
Block: Heat-treated, deep-skirt, cast-iron (gray iron), parent bore with induction-hardened cylinder bores, five nodular iron cross-bolted mains
Heads: Cast-aluminum with six head bolts per cylinder (with sharing), 4 valves per cylinder, forged-steel rocker arms (each rocker arm utilizes a guideless bridge to operate two valves)
Crankshaft: Forged 4340, Tufftride-treated for improved fatigue strength, and heat-treated for a cast-hardened surface
Connecting Rods: Powdered-metal, cracked cap with DLC-coated wrist pins
Pistons: Cast-aluminum “re-melted” (edge of piston crown is heat-treated following the casting process)
Valvetrain: Overhead valve (OHV), 4 valves per cylinder, beehive valve springs, single cam-in-block design, solid rollers
Injection System: Electronic high-pressure common rail, direct injection
Injection Pump: Denso HP4 high-pressure fuel pump with 3 internal plungers, 29,000 psi peak pressure
Injectors: Denso G4S Gen III electronic, solenoid type
Lift Pump: Electric, in-tank
Firing Order: 1-2-7-8-4-5-6-3
Aspiration: Turbocharged and intercooled
Intake: Cast-aluminum Y-bridge, intake airflow valve (i.e. throttle valve)
Turbo: BorgWarner B2BV-70A electronically activated variable geometry, non-wastegated unit with 61mm billet compressor wheel (inducer) and turbo brake
Intercooler: Air to air
Emissions Equipment: Dual circuit exhaust gas recirculation (EGR), diesel oxidation catalyst (DOC), diesel particulate filter (DPF) with ninth injector for regeneration, selective catalytic reduction (SCR)
Overall Weight: 835 lbs (dry)
Horsepower: 445 hp at 2,800 rpm (’17-‘23), 470 hp at 2,800 rpm
Torque: 910 lb-ft at 1,600 rpm (’17-‘23), 975 lb-ft at 1,600 rpm
Available Transmissions: Allison 1000 six-speed automatic (’17-‘19), Allison 10L1000 10-speed automatic (’20-‘24)
