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Prove it with the SF-4000HD, SuperFlow’s first 4000HP engine dynamometer. We’ve listened to our customers who have asked repeatedly over the years for a test stand that could compete with the rising horsepower of today’s engines. Through advanced in-house engineering, design, fabrication, and production, SuperFlow has delivered the industry’s first complete testing solutions for high horsepower engines.
The SF-4000HD dynamometer system has been developed for customers that require an affordable solution for testing high speed diesel, gasoline, and alternative fuel engines. With a new stronger dyno shaft (w/splined coupler), a rigid, robust frame design, and a water brake based on the legendary SuperFlow design, SF-4000HD provides reliable testing for 4000HP engines at speeds up to 12,000 RPM. The larger pump and water circuits handle the increased water needed to load even the largest of power engines. Bigger bearings, new high RPM seals, easy access servicing, and plenty of other features helps this dyno set the standard for excellence in high horsepower testing.

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  • Sensor box is boom mounted, keeping it out of the way but still within reach
  • Integrated boom routes water away from the engine
  • Sensor box is boom mounted, keeping it out of the way but still within reach
  • Integrated boom routes water away from the engine back to the cooling tower and keeps transducer cables organized
  • Large tool tray keeps necessary items close at hand
  • Heavy duty, industrial grade drive shaft guard for safety and durability
  • Torsionally compliant Mark Williams U-Joint dynamometer driveshaft
  • Versatile engine docking cart also integrates with the SF-Powermark and SF-902S
  • Over-centering clamps securely connect docking cart and base-frame
  • Industrial grade, heavy-duty base-frame for extreme durability
  • Load cell is temperature compensated and absorber is rugged with high torque

Product Specifications

Standard Configuration
Temperature 16-channel thermocouple panel
12 closed tip thermocouples, 1/8″
12 swagelock fittings
12 ten foot extension cables
Pressure 10-channel pressure panel
3 transducers (-15 to 150 psi)
Air / Fuel 2 pre-configured analog inputs
Fuel Flow 2 fuel flow measurement turbines
Air Flow 1 air flow measurement turbine


Absorber Type Water brake
Maximum Speed 12,000 RPM
Horsepower Capacity 4,000 hp (2,237 kW)
Torque Capacity 2,626 lb.-ft (3,390 Nm)