Quote:
Originally Posted by w3rkn
Not necessarily so..
Steve Dinan talked about this some years ago. That typical stand alone Dyno testing, doesn't mimic real world pressures in front, or under the hood, etc.
Such testing/tuning needs to be done in a near wind-tunnel like conditions, or on a bench dynamiter.
BMW does their homework, & fluid dynamics are important.
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Incorrect -- Because there is no wind tunnel doesn't mean that you can't use a baseline of difference of power and wheel torque gained. That is the purpose of a multiple pull baseline run from warm to hot. If you were comparing wind tunnel tuning from an OEM tuned car to a modded dyno pull this would be correct.
Steve Dinan himself in his own words on his very own site states this...
http://dinancars.com/product/d760-00...?series=&mid=/
Also the above post here has a baseline dyno with the OEM box and the aftermarket AFE with a dyno chart to prove this correct. Especially with IAT monitoring you can net amazing results.