This is the whole point i have been trying to make

All things equal 2 exact same cars, same power output and driver both forced induction.

With a forced induction setup there can be a massive variety of power outputs at any given rev range (within the turbos efficiency)

Eg 5000rpm @ 10psi may equal 120wkw
5000rpm @ 5psi may equal 110wkw
5000rpm @ 0psi may equal 90wkw

This is what i ment by constantly staying at your maxium power possible at all points in your rev rang (being at full boost). With NA this is different

Eg 5000rpm @ 0psi may equal 110wkw...

This is the only possible combination.

Launches with FI = launching on no boost or launching on full boost... completely diffferent.. as you are launching with different power capabilities.
Just because you are at 5000RPM doesnt mean your on full boost. You could be anywhere between 0psi and 10psi.

Launches on N/a = launching alwayes on 0psi. your never going to have any more power to utilise.

Now shifts. A slow shift with NA isnt that critical. All you loose is a little bit of time. A Slow shift with FI is COMPLETELY different. You loose your time AS WELL as all your boost power that you have built. This means for a fraction of a sec (depending on turbo size and boost pressure) it will need to re-build back to full boost. Meaning there are times after your shifts where your car is not running at its peak power (AT THAT POINT ON YOUR RPM).

So after 3 shifts and haveing to rebuild boost 3 times (all adding up time). This means you are no longer at your peak power (at all points on your rpm).
Ie you are NOT at your peak power RPM for 100% of you run.

Thats why MPH varies so much with FI setups as well as why you cannot predict as accurately what the setup is good for.

Anyone feel free to add comments or critism to this.

I stand by everything i have said, but i can admit that getting a cars FULL 1/4 potential time is alot easier from NA as to FI.