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Why is a loading dyno (Dyno Dynamics) better than an inertia dyno (dynojet)? - Loading dynos are better than inertia dynos for a number of reasons.
A) Steady State Tuning
B) More precise measurement
C) Load can be controlled
MORE PRECISE MEASUREMENT
Because inertia dynos use a heavy mass to simulate the inertia of the car being tested it is hard to monitor minor changes in power. The large mass of the rollers masks small changes in engine power and the inertia dyno sensors have a hard time picking up these small changes in roller speed. If the sensor and computer don't see the change in roller speed the dyno graph will not show a dip in power. However, a loading dyno uses rollers with very little mass and directly measures power rather than calculating it. Quick drops in power will be picked up by the load sensor and will show on the dyno graph. This is very useful for finding problems and ensuring that your engine is running correctly.
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