<rant on>
I see a lot of videos with cars listed as "untuned".
Either your car is in an A/F range that the engine is happy with, or it isn't.
If your car is not running right - don't race it - go get it tuned.
If your car is running right, and good enough to race, then it isn't "untuned", it just might not be at the optimal setup.

The reality is, if you are good enough to run, then it is unlikely that you will suddenly be much faster if you retune the car. So quit using "untuned" - because anyone that is claiming that is just looking to have an excuse ready for when they lose.

Example:
"You only beat me because I haven't tuned my car yet. Once I get it tuned, I will drag you down the street."
</rant>