I'm confused too. I haven't heard of anyone running race fuel or nos in a raptor.
Good question although we have had some customers that run race fuel, (turbos, blower) it can forsure be another tune for lets say higher octane or just different fuel, spark or idle.
So if you had a base tune of 87 octane an you want to put in 93 octane at the pump, we could set the secondary tune up for 93 octane.
Or on the flip side lets say you have a 93 base tune and for whatever reason your on a road trip an there is only 91. The secondary tune could be 91 or 89 or 87 (but only one tune can be secondary)
We can fuel, spark, and idle. So if you had loud exhaust and wanted the idle lower we could do that, or higher for that matter.
The main thing it does is allow real time switching without the need to reflash the vehicle.
I hope this helps
LMS