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What does the fourth dyno run mean? w/o exhaust and FILTER COOL DOWN? It looks like only seven minutes went by, so it couldn;t mean that it was on a cool engine. Does it?
I don't know, as the other times are pretty tight too. Six minutes to remove a hot muffler is pretty good!
The huge problem with dyno results is the need to make the runs on the same vehicle while changing only one parameter at a time. You cannot compare EV-AIC's results with ScionVan's because any increase would be hidden in the "noise" of variations in temperature, humidity and vehicle-to-vehicle variations. Getting good dyno data is not an easy exercise.
you guys can't compare dyno runs taken with different dyno machines on different days with different temperature conditions. the AEM intake only makes 1-3whp and it will be hard to notice that when comparing a baseline dyno from one place and a modified car from another place.
__________________ eric m.
featured ride: september 2003
I think that muffler was removed in less than 3 minutes actually... And the same for the airbox... these cars are EASY to work on! Darren: The cool down is after we stopped the car from the previous runs, shut it down, and ran two fans over the engine to cool it down for a couple minutes. Interesting to see that even with that minimal cooling, a little difference was made.
And George and Eric are correct... you can never really compare numbers from two different cars measured on different dynos on different days. Dynojets are good for measuring relative changes in hp though. So in the case of our dyno session, it did allow us to determine whether we were gaining or losing hp, and it gave us a general idea of how much hp and torque that particular car was putting down on that particular day under those particular conditions.
if runs made on dyno jet dyno's, the results are comprable and repeatable . there corection software is very good and accurate. i have 7 years experience with motor cycle and diesel engine dyno tunning and dyno jet is by far the easiest to use.