Detroit Diesel 8V92 NA – Engine Specifications

General

• Manufacturer: Detroit Diesel

• Engine Model: 8V92 NA

• Configuration: 90° V-8

• Cycle: 2-stroke diesel

• Aspiration: Naturally Aspirated (no turbo)

• Fuel System: Mechanical unit injectors

• Governing: Mechanical (industrial constant/variable speed)

Displacement

• Total Displacement: 12.1 L (736 cu in)

• Bore x Stroke: 4.84 in × 5.00 in

Power Ratings (Typical Industrial)

• Rated Power: 300 – 375 HP

• Common oilfield ratings:

  • 318 HP @ 2100 RPM

  • 350 HP @ 2100 RPM

• Rated Speed: 2100 RPM

• Idle Speed: ~600 RPM

(Your rebuild tag shows ~368 HP @ 2100 RPM, which aligns with a high industrial NA rating.)

Torque

• Peak Torque: ~900 – 1,000 lb-ft

• Peak Torque RPM: ~1200–1400 RPM

Cooling System

• Type: Jacket-water cooled

• Thermostat: 170–180°F

• Water Pump: Gear-driven centrifugal

Lubrication

• Oil Capacity: ~7.5 – 8 gallons

• Oil Pressure (hot): 40–55 psi

• Oil Type: SAE 40 (typical for 2-stroke Detroit)

Fuel Consumption

• Specific Fuel Consumption: ~0.38–0.40 lb/hp-hr

• Less efficient than turbocharged or 4-stroke engines, but very robust