on the road logging and remapping once reviewing the logs is a very good way of getting it in real life state. Dyno's and loads applied can get things pretty hot, more so than real world conditions.... but the downside of some on the road mapping is finding the right bit of road where you can drive an assortment of conditions, part throttle, full throttle, higher power/wheelspin in lower gears, which means some high speeds. Mine when logging earlier this year post new engine/turbo, would only grip in 5th & 6th, which is significant speeds... (winter conditions, salty roads... but you get the idea.)
Slap it on a dyno to see the end result figures then.
Slap it on a dyno to see the end result figures then.