DYNOGRAPH
Our inertial dynamometer measures rear wheel horsepower, which can be calibrated to different standards, the most common being DIN or SAE.
The first thing to remember is all dynos produce different values, but the shape of the curve is the only component you are interested in. Correctly tuned engines will produce wider and flatter power curves at all throttle openings, and if an engine shows an increase on the same dyno using the same gearing & tyre, it almost certainly will be more powerful.
Secondly, chassis dynamometers measure horsepower or torque at the rear wheel, and losses through the driveline vary with respect to the speed of these components, so an “engine” or “flywheel” calculated figure is ALWAYS an estimate, but there will ALWAYS be more power at the engine than the wheels.
Next, fitting aftermarket components or modifying the internals of your engine, almost always changes the fuelling & ignition requirements, so by doing a “before and after” run you now have a clear indication as to what these are, and possibly what you have to do to correct things.
Lastly dyno time can be unnecessarily expensive if poorly executed or planned, so if you are feeling a little lost or confused, why not discuss what you want to do with us first and let us help you decide on a suitable course of action, we don’t like wasting our time or wasting your money.