i'm gonna take a wild stab in the dark and guess at 2 things...

1) the rolling road place has no practical working knowledge of nitrous

2) they leaned off the fueling coz their metering stuff was reading really really rich.

3) it was showing good AFR

4) suddenly it melted

5) they suddenly realise that if they knew how nitrous oxide worked that their monitoring equipment was useless and they leaned it off waaaay too much



like i say thats a guess, but its actually quite common for people to do this that dont understand nitrous... lol

the other posibility is that it was a NOS, NX, etc. kit and the pars are so shite they failed again, thats quite common too