[benchtest]

Here are some random thoughts pertaining to your project.

1) Engines run on an air-fuel ratio. Regardless of air temp, you have to maintain the ratio. If the air is denser, then the fuel must be adjusted to match. I know you’re in the early stages, but you need to run under proper conditions to validate any claims. Otherwise, it could be assumed that you didn’t gain any power, rather, you were simply losing power before due to an over-rich condition. Also, what engines did you run this on?
2) Engines run on vaporized fuel. With the temps you are claiming for the liquid air at the nozzle, you’re going to condense/freeze the fuel, not vaporize it. Lack of vaporization is the reason we had chokes, and it’s the reason some racers using nitrous on alcohol motors actually run a second fuel tank with gasoline in it for the nitrous system. Nitrous vapor temps. are around -54 degrees. Gasoline’s flash point is around -40.
3) I’m not a chemist, but by definition wouldn’t N2O be 1/3rd oxygen? Air is around 20% oxygen. You said: “there is just about as much oxygen in liquidfied air as in nirtous oxide”. Am I not understanding, or is there a 50%+ difference?
4) Legal stuff: Not my area of expertise, but wouldn’t you need placarding and a haz-mat CDL to drive with liquid nitrogen on the vehicle? Also, there are many safety concerns with hauling liquid nitrogen in the event of an accident, or even a leak.
It’s an interesting idea. Please, do post the dyno runs, with vehicle and atmospheric data. Post the patent number also if you could.

Good luck