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Originally Posted by olddog
It is easy to see that doing a static test at every few hundred rpm would be a real PITA.
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Hey olddog,
I don't know if you have ever watched an engine dyno pull, but when you are "up close and personal" it gets the adrenalin flowing - especially if it is your engine!
I watched my engine go thru several pulls from 3000 to 6000 RPM on the engine dyno at Performance Engineering. Eric would bring the engine up to about 3500-4000 RPM, then he let the computer control the pull. The computer took the engine to full throttle while loading the dyno brake, pulled it down to 3000 RPM and started recording data. Over a period of 10 seconds it increased to 6000 RPM, then Eric would stop the pull. The following data was recorded in 100 RPM increments: RPM, torque, BSFC, A/F ratio, water temp,
oil pressure, barometric pressure, and relative humidity.
That last 1000 RPM increase was pretty intimidating! I can't imagine stopping every few hundred RPM and letting the engine stabilize long enough to get static numbers. I don't think I would want to subject my engine to that much punishment.
Rodger