hi irwin..

as RT said it depends in most cases.. and the tuner id say..

a road tune is better at getting the 'little things' sorted.. you can see a lot more happening on gear changes and off-throttle like boost fluctuation and spikes that the dyno doesnt show.. i had a boost spike problem and never showed on the dyno till i took an RT tuner (u all know who it is!) out for a spin last week and showed him.. road tune ironed out most of the prob..

if we had heaps of coin it would be dyno run.. followed by road tune.. followed by naked girls on my private yacht with jessica alba making drinks