I was surprised to read over on the F30 forum that someone who just got the Dinan Tune 1) didn't notice a difference right off the bat...but did later, after "a bit of learning curve on the computer for the tune to kick in" and 2) first gear is jerky in Sport Auto mode and "not as smooth on acceleration as I would like it to be".
I don't know much about Tunes so maybe someone can chime in but why would there be any delay in feeling a difference? Shouldn't it work right off the bat, as soon as it's installed?
http://f30.bimmerpost.com/forums/sho...=986053&page=4