Dynamometer Testing - Clark Testing

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Dynamometer Testing


Clark Testing provides dynamometer testing for powertrains, drivetrains, transmissions, transfer cases, axles, brakes, bearings, clutches, drive shafts and gearboxes. We also provide dyno testing on electric motors with driving and overhauling loads up to 1300 horsepower. Our bus bar system at Clark can supply up to 600 amps at 480 volts to power your motor drive, with 2300 volt supply options as well

The experienced engineers and technicians at Clark’s dyno lab have over 100 years of combined experience testing rotating equipment. Our well-equipped 50,000 square foot facility is capable of testing vehicles, sub-assemblies, and individual components from automotive industry, including world-class competition race teams, to heavy off-highway equipment. Full vehicle testing options include cooling system performance, driveline studies, and durability testing.

Clark’s dynamometer test lab is an ISO 17025 accredited laboratory with ITAR Certification for DOD test programs. Clark can custom design test programs to meet the environmental conditions. This includes hot & cold temperature along with harsh environments such as salt & mud/slurry.

Testing Services



Test Equipment


  • Dynamometers: Multiple configurations
    • From 50 HP to 1300 hp. motoring
    • Absorbing capabilities to 2400 hp.
    • Torques to 200,000 lb.-ft
    • Speeds up to 14,000 RPM
  • Two Heavy Duty Chassis Dynamometers
    • Drawbar to 25,000 lbf @ 25 mph
    • Single axle span to 15 feet
    • Motoring and absorbing capability
  • Inertia Simulation
    • Variable Inertia Flywheels
  • Engine Driven Tests

Component Testing


  • Durability, performance, development, & efficiency studies
    • Axles
    • Bearings
    • Brake System Simulations
    • Clutches
    • Electric Motors
    • Gearboxes
    • Torque Converters
    • Transaxles
    • Transfer Cases
    • Transmissions
    • Universal Joints

Gearbox Lubrication Analysis


Clark Testing also has the capabilities to conduct lubrication analysis on transmission and gearbox fluids. Our lubrication lab can provide information on physical properties and chemical analysis lubricants, hydraulic fluids and grease. Clark’s lab features the specialized FZG testing for analysis of anti-wear characteristics and load carrying capabilities of lubricants.

FZG Gear testing simulates misaligned gear set operating in the selected lubricant bath and subjected to 12-14 stages of torque load. The fluid performance is determined by inspection for scuffing or scoring of the gear teeth between each load stage which indicates excessive wear and therefore a breakdown in fluid performance.



Vehicle & Component Dynamometer Testing


Environmental conditions for Off-road testing can be simulated with high/low temperature, accelerated corrosion/salt and sand/road-dust. Custom control and data acquisition of torque, speed, vibration and temperature.
  • Medium & heavy duty trucks
  • Medium duty passenger vehicles
  • On road tandem axle tractors
  • Heavy Off-Road Equipment
    • Construction
    • Mining
    • Agriculture
    • Logging & Forestry
    • Marine
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Clark Testing has been providing product qualification testing and design verification for manufactures for over 20 years. We provide our clients with independent testing.

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