Quote:
Originally Posted by 1000whpTSi
Well,yeah.That was my point.I can't get why there is such a fluctuation in numbers from dyno to dyno.I mean I understand the reason why,but I don't understand why they don't correct it.
I mean you don't see that type of fluctuation in engine dynos.Thats like using two different tq. wrenches and having to use different tq. settings from one wrench to the other.
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Well it's all in the way the operator sets the dyno up. You can set a dyno up so that is shows a stock wrx making 400 hp but the chart will look the same the numbers will just be higher. You don't tune off numbers anyway you tune off the hp and trq curves. I have dynoed my car on a Mustang dyno and on a Dynojet both gave me different peak numbers(The dyno jet was about 20hp higher) but if you layed the charts over each other the charts are almost exactly the same and thats all that matters. Like what has already been said a real test of how much power you are making is your trap speed and/or the MPH gained from the 1/8th to the 1/4 mile marks.
Two Mustang dynos of the same model won't spit out the same numbers unless they are both configured the exact same way in the software. The Mustang dyno I use was calibrated by Mustang after it was installed. They came out with a bunch of equipment and set the thing up correctly. Not many shops want to pay the extra money to have the dyno calibrated correctly so they just punch in "suggested" numbers provided by the dyno manufacture.