Quote:
Originally Posted by Khánh
i don't know anything about dynos but i'm a bit lost on this .. if dynapack reads at the hub and there is no tire friction, doesn't that equate to dynoing higher than dynoing at the wheel? no friction= less pwertrain loss? am I not thinking correctly?
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Indeed you are not, the dynapack itself absorbs energy and you still measure the power after the kinematic chain ... its not a "engine dyno", the gearbox dissipates energy by friction, the prop shaft does, the diff does ... the bearings do, all that kinematic chain from the flywheel to the rear wheels hub dissipates energy in frictions ... and that usually is accepted to be up to 16% itself.
so losses + dynapack loss = that number.
Yes it could be corrected, ajusted so it looks "better" but whoever knows about Dynos, and a given car has been "dynapacked" knows that the raw result will be lower than other solutions. Once again, when you tune a car, the Delta is important, not the absolute raw number ...