Quote:
Originally Posted by Zuzu
Adrian, I discussed this with Tunehouse after our last discussion and they assured me the most variance would be 3 to 4% over a DD dyno..Which would equate to 7.5 to 10kw if that..
My bad, as I should have gone straight back to ALS and used his Dyno..Might still do that..
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It is in Tunehouses interest for customers to think that. I can assure you that their claim goes totally against the accepted norm for dynapack dynos vs DD dynos. Go to the MRT Performance web site and they use a hub dyno and state that it reads higher. Typically standard WRXs read about 50kW less than factory claimed flywheel power on a DD. On the MRT dynapack they read about 20kW less. It stands to reason also.... it takes alot of power to spin up those heavy wheels, and dynapack does not If I had the time I would dig up some graphs for various cars tested on both. All read alot more than 4% higher on dynapack.... but whatever makes you sleep better....
Fact remains you are not comparing apples with apples. Hub dynos read differently... this is well known on Automotive forums all over the world. Even many roller dynos read different, but within the same brand of dyno you should get some consistency atleast, and in Australia, the defacto standard is dynodynamics.
Bring your car to Advan for a run Zuzu, and then we have your apple to compare with the other apples.