Hogerwerf 15
4704 RV Roosendaal
The Netherlands

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Dynostar 4T


With this unique and multifunctional dynamometer, you are able to test three different types of vehicles: carts, ATV’s and motorbikes. All Dynostar Model 4T dynamometers are fitted with electrically adjustable wheel clamps. The wheel clamps are designed to make sure even wide quad tires can be clamped without any problems. 

Because the dynamometer is fitted with a roller with a high mass inertia it is suitable for dynamic power up to 440 kW. 
With a powerful air-cooled retarder this dynamometer can absorb power up to 355 kW (with a cold eddy current brake). To save space, the eddy current brake of this Model is integrated in the roller. To cool the eddy current brake, Dynostar has applied the principle of forced cooling. A centrifugal fan presses air through the heart of the roller, this way the retarder is force-cooled. 

Standard hardware features:

  • DAS Data Acquisition System
  • Advanced Dyno Station Software package
  • Junction Box
  • 37-pin cable (length 7 m)
  • RS232 cable (length 3 m)
  • Calibration weight
  • Remote control (length 2.5 m)
  • Straps (2 pcs)
  • Instructions
  • CE marking
  • Emergency brake
  • EMC filter


Standard software features:

  • Static power measurement
  • Dynamic power measurement: Roll on, Negative test, All gear, Variable transmission, 
    Fast acceleration, Multiple speed
  • Acceleration test
  • Speedometer test
  • Weather station
  • Power correction to DIN, EEC and SAE standard
  • Automatic braking after completing dynamic test
  • Real time display of engine speed, power, traction and vehicle speed in software
  • Simulation of roller and air resistances for simulating situations on the road
  • Automatic calculation of losses in the drive line and calculation of power at crankshaft


Weight: 650 [kg] 1433 [lbs]
Dimensions (lxwxh): 2,40 x 1,63 x 0,92 [m] 94,5 x 64,2 x 36,2 [inch]
Power requirements: 230 [V] 110 [V]
Air requirements: 3,5 [bar] 3,5 [bar]
Max. speed: 325 [kmh] 202 [mph]
Drum width: 1,35 [m] 53,1 [inch]
Drum diameter: 0,52 [m] 20,4 [inch]
Total mass inertia: 17,21 [kg/m²]  
Equivalent vehicle mass: 257 [kg] 566 [lbs]
Max. dynamic power: 440 [kW] 587 [Hp]
Max. static power cold: 355 [kW] 476 [Hp]
Max. static power continuous: 139 [kW] 186 [Hp]