Testing theory is based on the idea that the results can be reproduced at a later time. While this is obvious at face value, in practice it can be quite difficult. Dyno testing our 2.3L turbo cars with the assumption of repeatable (therefore accurate) results takes planning, accurate test equipment, and data recording of ALL significant variables.
Engine inputs are:
Air temperature, air humidity, air pressure, fuel energy (BTU/lb), fuel motor octane rating, fuel research octane rating.
Engine operating condition:
Cooling water temperature, base timing, max boost, ECA calibration, fuel pressure, air charge temperature
Engine build configuration:
Cam, head flow, intake manifold flow, exhaust manifold flow, compression ratio, turbo
These are just for starters. The key is to write everything down in a logical format. Since the advent of the internet we easily communicate quite easily and potentally accurately. I propose this standardized dyno sheet. Print several prior to the test and be sure the test equipment is calibrated !!
DYNO TEST SHEET