Originally Posted by
tabetha
Just one of the reasons why a rolling road is better than a live map, you can control every situation and hold under any load any speed any gear, can't do that on the road.
Once mapped though you could run purely on egt, so long as you don't make any changes.
tabetha
You can control very little on a rolling road. Sure, you can get steady-state rolling roads now which allow you to hold the engine at a target rpm but it's not a touch on an engine dyno.
I've been quite successfully able to hold an engine at a given speed and load on the road as i'm sure most professional tuners have/do...
I think you'd be insane to rely purely on EGT. As with everything, you need as many sources of information as possible to decide what and when there is a problem - relying on one sensor can lead you down the garden path.