IIRC it took a pretty good hill for my old 90 Daytona with a 2.5 in the tiny mistu turbo to go into boost, if that car didn't do it often I don't know what one would? I know my 86 Shelby Charger took more to do it. Haven't been on any 'big' hills yet with the Fury, but so far it's never in boost unless I put my foot into it more than necessary, and it's got pretty tiny turbos on it.