Dinan tunes are based on specific Dinan mods.Tunes are done on a dyno with setup that is attached to the wheel hubs for accuracy. Dinan tunes are not so radical that they reduce engine reliability and longevity so it is likely they leave some performance on the table.
I work up a plan with tuner and dyno tech that limits dyno runs as much as possible to minimize risk of something going BOOM on the dyno. Even with a plan it is quite likely you will do more runs than planned. Unless variables such as temp and humidity are controlled I do all runs on the same day whenever possible, especially when I don't expect gains to be significant.
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas
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