Its Danny not Jano.


Common sense really pal.

A rolling road has no drag, friction, air flow, weather conditions etc etc etc.. That you have on a real road.
Any decent RR tuner would test what they have done on the REAL ROAD after. Making sure what they have done is relevant to what actually happens when driving.

The basics is this, a RR saves alot of time for the tuner. This is because the tuner does not need to keep going backwards and forwards to the workshop to edit the map write a new chip etc get back in car and test again.

The next thing is you get a graph of the power you have gained lost whatever..

If the RR operator wants to show higher or lower power than what is actually available this is easy to do. So are you the customer getting a true figure?

My advise would be go to a decent Tuner like Jano, Ahmed, Stu@Msd, NMS etc who will map the cars on the real road in real conditions.
Then if you wish to have a power run done to see what power you have, then do so at a low cost of around £40-50 on most Rolling Roads.

If thats how the best have been doing it for this many years surely that give you an idea to why....

much love Daniel.