The question of whether dynamometer (dyno) testing can damage a car is a common concern among automotive enthusiasts. The truth is, when performed correctly, dyno testing poses minimal risk to your vehicle. There’s no concrete evidence suggesting that dyno runs inherently cause damage.
Damage to engines is more likely to result from factors unrelated to the dyno itself, such as over-revving, excessive heat, shock loading, or incorrect fuel and ignition settings. If an engine issue surfaces after a dyno test, it’s probable that a pre-existing condition or improper operation caused the problem, not the dyno itself.
In fact, driving your car on the road likely presents a greater risk of engine damage than controlled dyno testing. To ensure a safe dyno experience, always choose a trained and experienced dyno operator. A properly functioning cooling system is also crucial. A large fan, ideally around 60 centimeters in diameter, is generally sufficient for providing adequate cooling during power runs, preventing the vehicle from overheating.
However, remember that dynamometer testing, especially when setting up race cars or bikes, requires precise control. Heat soak, where heat builds up in the transmission, bodywork, engine block, and oil, can affect power output and compromise test accuracy. Ideally, a wind tunnel should be used to simulate the airflow experienced during on-road driving. When a vehicle is driven at full power, fresh air constantly cools it. Replicating these conditions on a dyno is crucial for accurate results.
If the dyno facility lacks suitable working conditions or an adequate cooling system, it’s best to avoid testing. The issue of tire damage from dyno testing is more nuanced. Tire manufacturers often recommend tire replacement after dyno testing, citing that tire design isn’t intended for such use. They suggest that heat and deformation could compromise the tire’s internal structure.
While these recommendations are often precautionary, well-designed dynamometers shouldn’t damage newer tires. Always inspect tires after dyno runs to ensure their condition.