I know this will upset all those who map on a rolling road, but can I just add, it is IMPOSSIBLE to map a car on the rolling road AND be confident it wont det on a high speed run on the road. I have been saying for years why I would never recommend a RR for final mapping. It is an ideal diagnostic tool, but cannot in any shape or form represent either the load or air flow achieved at 180mph! FACT!
What this means is that people who have their cars mapped on a RR must accept that det is a real risk when using the car in the real world. FACT!