User Guide

Dyno2000 Advanced Engine Simulation—99
Environment
1) Air for induction is 68-degrees (F), dry (0% humidity), and of 29.92-in/Hg
atmospheric pressure.
2) The engine, oil, and coolant have been warmed to operating temperature.
Methodology
1) The engine is put through a series of “step” tests, during which the load is
adjusted to “hold back” engine speed as the throttle is opened wide. The load
is adjusted to allow the engine speed to rise to the first test point, 2000rpm
in the case of this simulation. The engine is held at this speed and a power
reading is taken. Then engine speed is allowed to increase to the next step,
2500rpm, and a second power reading is taken. This process continues until
the maximum testing speed of 11,000rpm is reached.
2) Since the testing procedure increases engine speed in 500rpm steps, and
engine speed is held steady during the measurement, the measured power
does not reflect losses from accelerating the rotating assembly (the effects of
rotational inertia in the crank, rods, etc.). These processes affect power in
most “real-world” applications, such as road racing and drag racing, where
engine speed is rapidly changing throughout the race.
Other Program Features