Originally Posted by
GUZZLER
some dyno's don't 'load' the car enough, its always worth checking/readjusting on the road.
What? I think you have that a bit backwards. Engine dynos load the engine fully, this is how they hold them at a given speed.
As Mike Rainbird says, they're generally checked on the road, as things can change from the dyno to the car (eg, the installation) and any fine tuning to the maps can occur.