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dynomot faqs

How to correctly tie a car on the dyno?


Properly holding a vehicle on a DYNOMOT dyno is a simple process, but it takes practice.


As a general rule, we will always tie crosswise on the axis with traction and, therefore:


  • FWD: we tie two straps crossed in front and two more straight behind without crossing.
  • RWD: we tie by crossing two straps behind plus two straight lines in front without crossing.
  • 4WD: we tie crossed in front and behind.
  • Super sports vehicles: rear part must have two crossed straps plus two straight straps (minimum six fasteners in total, four behind, two in front)
  • Hyper sports vehicles: to all of the above we add two or four more straps that hold the vehicle from the sides to the front suspension triangle (8 to 10 fasteners in total).


NOTE: the more ties we have, the more difficult it will be for everyone to hold equally tight. Find the right balance. Tighten YES, but fully tighten NO!


How to make a correct cast or measurement on a DYNOMOT dyno?


Through the free training that we give in our facilities or by reading the instruction manual.


What happens if the car is released on the bench while we are running a test?


Can we be released or break a mooring? In most cases due to carelessness of not putting the insurance or wanting to extend the useful life too much. What is almost impossible is to break or release all at once.


If a car is released while we are running a test:


  1. In all cases, the total mass of the vehicle does not move, it does not have inertia, so we can stop the car quickly in the event that a mooring is released.
  2. If a fastening is loosened or loosened: we will notice a sudden lateral deviation and automatically, we will straighten the car, we will release gas. Always one hand on the wheel.
  3. We will only step on the brake if a wheel goes off the roller, stopping the vehicle completely.
  4. The maximum damage that we can cause is that a tire is damaged by being poorly placed between the covers and the rollers.
  5. A safe work area must be delimited on the ground where neither customers nor workshop personnel can access during the rehearsals.


Dynomot is approved to be installed in a pit and also on the surface.

 Above all, safety, let's be aware at all times and work safely.


What should I do and what should I NOT do in a power bank?


  1. DO NOT operate with the windows up. Driver's window always down! When rolling, the door locks are closed and when we get out, the car can be left locked with the keys in the ignition.
  2. Tighten the ties strongly, but DO NOT tighten to the maximum. Don't forget to put the insurance!
  3. DO NOT touch the brake pedal while moving. When I'm on the dyno I forget about the brake pedal!
  4. Have one hand on the steering wheel to control possible deviations or unpredictable reactions of the vehicle.
  5. Carry out a preliminary break-in without accelerating fully so that the car naturally repositions itself on top of the roller.
  6. Check the tension of the straps a second time.
  7. FORBIDDEN to get on and off the vehicle if it is in motion.
  8. DO NOT make successive launches without allowing the vehicle to cool down properly.
  9. Disengage traction controls and activate DYNO mode if possible.
  10. DO NOT accelerate a vehicle fully if we suspect that it has a mechanical failure, breakdown or strange noise.
  11. Activate the roller lock to facilitate the entry or exit of vehicles.
  12. Disable roller lock to start rolling.
  13. Be careful when loosening the fastenings so that the vehicle does not escape or that it could fall down from the roller and catch us.


When should I replace the tie down straps?


Mooring straps, slings or lashing sets deteriorate over time and with continued use. Take special care to replace them if:

  • They have come into contact with exhaust pipes or hot areas due to possible burns.
  • If they are in a state of excessive wear or signs of unstitching or tears.
  • If the pawl does not engage properly on both sides of the secure position.


Should I grease the bearings of my power bank?


NO. They are designed to withstand at least 10,000 hours of use. These are sealed bearings that carry a special grease for high speeds.


How often should my dyno be serviced or maintained?


  • Once installed, it is necessary to carry out a revision at least once a year.
  • Retighten all hardware to the correct torque.
  • DO NOT grease the bearings, they are sealed.
  • Lubricate the moving parts and pivot points of the systems that have joints or transmissions, such as the FLAPS or the roller locking system.
  • Regular cleaning in general.


What happens if a vehicle does not give the power that the manufacturer announces?

  1. Analyse if we have correctly launched the vehicle in the entire RPM range until the cut.
  2. Review the graph to detect possible behaviour anomalies.
  3. Review the bench software configuration to see that all the parameters are the ones indicated by Dynomot.
  4. Listen if we have any strange noise or if we can detect any possible fault.
  5. Some models do not give the power that the manufacturer indicates, and there may be some horsepower below the advertised figure.
  6. Consider the values ​​of temperature and atmospheric pressure in the test room.
  7. Do not punish the vehicle too much with very fast launches without letting it cool down enough. The first thrown is the good one!


What happens if a vehicle gives more power than the manufacturer announces?


  1. Analyse if we have correctly launched the vehicle in the entire RPM range until the cut.
  2. The ratio calculation must be made with the same gear in which we make the release.
  3. Review the bench software configuration to see that all the parameters are the ones indicated by Dynomot.
  4. We must know if the vehicle has any modification in exhaust, admission, previous reprogramming, etc.
  5. Find out if you can carry any other fuel that is not the usual one: SP 98, additives, methanol, etc.


Does tire pressure affect power and torque measurement?


It doesn't matter because Dynomot calculates all drag losses, but it's clearly not correct to run a vehicle with less than the manufacturer's recommended air pressure in the tires.


What is the ratio calculation for?


The ratio calculation allows Dynomot to identify the engine's RPM range at any given time. 

The ratio calculation is always set using the gear we will use to launch. If we want to launch in different gears, we will have to readjust the ratio calculation based on each gear that we want to use for the test.

NOTE: with the heat it is common for the tire to heat up and swell a little. Therefore, we must review the ratio calculation based on the number of throws with some frequency.


Lambda probe and gas analysers


Dynomot always recommends using gas analysis systems when we have a vehicle on the bench. Depending on the type of vehicle and engine, it will be mandatory to use them to certify its proper functioning, reduce pollution and avoid problems in the ITV.


Ventilation systems and smoke and gas extraction lines

Dynomot reminds you that it is mandatory to use workshop-approved gas extraction systems. Request your budget today without obligation.


Security perimeter


It is mandatory by law to mark a security perimeter of two meters wide all around the power bank.