Dynamometers are great tuning and research tools, but they do have their limitations. The primary limiting factor of a dyno is that it’s static. It tests power at the wheels while all other parts of the car are static, which is a condition you’ll never experience on any track we’re aware of.
So you end up getting a highly repeatable …
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Eww canned tunes on track...yikes. I won't run them on the street. Typically just a throttle map and maybe an increase to load or boost targets. The worst of them removing the load based targets and just going boost.
A proper load based tune with more allowance for timing over boost should get better results with less heat. Add a gallon or two of E85 and then you may be able to do both.
If you do spike with some E85 you can bump up any of the pesky IAT/ignition modification tables. You'll get the power back.
The steady state part of tuning is easy- making power is incredibly straight forward. Can take time, depending on the number of variables that need to be dealt with, but it's not hard.
Most of the OEM calibration time is spent on starting and transients. Heck, all of the many thousands of miles driven during development is about transients.
