The problem is the lean spike, just because you didn't melt a piston doesn't mean it doesn't have a nasty lean spike. Did you ever get tuned on the bottle only? i bet the a/f is nasty when it hits. Granted of course all nitrous kits do this, but the 2v plate kit is know for its nasty lean spike.
I know me talking badly about a NX product makes you angry though j/k
