it means, He tunes cruise in normal driving conditions, on the road, than once its on the dyno he tunes the top end of the map for power runs and than checks over the cruise on the dyno, it makes it cheaper for the customer and alot better!! the bigger workshops cant be bothered to do all this, they would rather just put it on the dyno get it roughy right, than tune power and hand you your paper sheet with the magic numbers.
Jez takes the time to tune it on the street under normal driving conditions, than puts it on the dyno to tune the top end, with is hard on the street when everything is happening so fast. Once its on the dyno, he loads the car up more than it would be on the street, If it dosent knock on the dyno under load, it wont knock on the street under load, And it also give alot better fuel econ
Its the diffrence between goin to a big workshop with a time slot for you, to have your car done in, or a person which puts in the effort to make sure everything is perfect, from idle to crusie to power, in norm driving conditions and under dyno load.
its the same way Just Jap gets there race car tuned, and id say alot of the Jap work shops would do it like this to....
Dyno is good, you can basicly do it all on a dyno... but having it road tuned and than double checked on the dyno is the best i say.
my 2 cents