No. Not for stage 1. But the tune must be developed on a map with the same engine and ECU software version.
Do we test every car on the dyno? Most we do Yes and what we apply to a car is based on R&D we've already done
We do however test every vehicle on the road and using the dealer tooling find out if any faults have been logged.
We are able to offer pre and post dyno runs for all vehicles either on a rolling road or using our on-road dyno system