HEMI® Engine Specifications

Specs

• Type and description: Eight cylinders, 90-degree V-type, liquid cooled
• Displacement: 345 cu. in. (5.7-liter)
• Bore x stroke: 3.92 in. x 3.58 in. (99.5 mm x 90.9 mm)
• Valve system: Pushrod-operated overhead valves, 16 valves (eight deactivating, eight conventional when equipped with Multi-Displacement System), hydraulic roller lifters
• Valve head diameter: Intake 2.00" (50.8mm), Exhaust 1.55 inches (39.4mm)
• Fuel injection: Sequential, multi-port, electronic, returnless with pump in-tank
• Block Construction: High-nickel, cast grey-iron deep-skirt block with 9.25" deck and cross-bolted main bearing caps. 27" width, 26" length and 590-lb weight.
• Heads: Aluminum cast alloy heads with 85cc hemispherical combustion chambers
• Ignition: Two spark plugs per cylinder, one coil pack per cylinder for dual plugs. Each is fired despite the other's condition
• Compression ratio: 9.6:1
• Power (SAE net): 345 hp (257 kW) @ 5400 rpm, (61.0 hp/L), truck applications; 340 hp (254 kW) @ 5000, passenger vehicle applications
• Torque (SAE net): 375 lb.-ft. (508 Nm) @ 4200 rpm, truck applications; 390 lb.-ft. (525 Nm) @ 4000, passenger vehicle applications
• Max. engine speed: 5800 rpm (electronically limited)
• Fuel requirement: Unleaded mid-grade, 89 octane (R+M)/2 - recommended; Unleaded regular, 87 octane (R+M)/2 - acceptable
• Capacities: Oil 7 qt. (6.6L), Coolant 18.7 qt. (17.7L)

• Centerline of crank to head deck face 9.3 inches
• Centerline of crank to centerline of cam 7.4 inches
• Centerline of crank to oil pan rail 2.6 inches
• Overall block maximum deck width at deck face 18.3 inches
• Overall block height from  oil pan rail to top of water outlet 15.4 inches
• Overall engine length 21.1 inches
• Combustion chamber volume 84.9cc
• Intake valve angle 18 degrees
• Intake valve head diameter 50.8mm, 2.00 inches
• Exhaust valve angle 16y.5 degrees
• Exhaust valve head diameter 39.4mm, 1.55 inches
• Weight (includes induction, wiring harness, auto-trans flexplate and exhaust manifolds, but not accessories) 485 lbs

• Cam tunnel is 7.44" above the crank
• Nodular, sand-cast iron crankshaft
• 6.25" powdered-alloy connecting rods
• Cast aluminum, low-friction pistons
• 1.65:1 ratio, large-pad cast rockers
• Tuned-runner nylon plastic intake manifold
• 80mm bore single-blade throttle body
• Vibration damper is press-fit onto the crank