[fiveohpatrol]

Were you using the nitrous then? If so, there could be a number of issues (low bottle temp, fuel and/or nitrous line or solenoid leak...)

Where is your nozzel mounted? It sounds like you could me letting in unmetered air through that leak. This means it will run leaner than normal, which can be bad, especially when using nitrous.

Get rid of that 160 thermostat, there is absolutely no need for it. Put a 180 in it.

How did you 60ft's compare to the previous runs?

Let us know how the plugs look, but I'd say they're going to be fine if you say it feels like it is running fine. If 1 or 2 cylinders were not firing, or were even slightly missing, you would know it. I've been there numerous times.

It would help to know a little more about the car. What year/tranny/engine combo, etc.

good luck