Saw this posted on the YB but because so many people run Nitrous and don't know what can happen I thought I'd post it here too. In this explosion it seems the engine stalls at lauch with the Nitrous on so the motor is full of Nitrous and fuel and the driver attempts to restart the engine. You should never do that. Here is the results.
I don't think I'd restart a motor that died with the nitrous on until I pulled the plugs and spun it over just because of all the similair explosions you see. At a minimum I'd spin it over awhile after I purged the system down with the WOT and ignition off and be sure it was clear. Leaky solenoids are another big issue. That's why you should always purge the system down while the engine is running before you shut it off.
It's very simple. If the engine stops for whatever reason and the nitrous has been armed, hit the purge button, spin the engine over WITHOUT the ignition on, then restart by spinning it over again then hit the ignition switch.
If the engine is cold or it's cold outside make sure to get some heat in the engine before trying to hit it with a big shot of nitrous. It usually will just cough back at the hit...we've had it happen a couple of times. Doesn't hurt anything except the embarassment.
The main reason people end up with fires or other nitrous related issues:
1. Brain fart (restarting car with nitrous armed & on)
2. Didn't check their system for leaks
3. Poor or no solenoid maintenance
4. System wired incorrectly
5. Programmable ignition programmed incorrectly
We were sitting on the fence that night. It was in lakeland Florida. Thank God he wasn't hurt. There was alot of cars having problems. What happend is every one was tuned for swamp air. The day temp was over 90 and really humid. But as it went into the night a cold front rolled in. Humidity went down and the temp dropped over 15 deg. even the turbo cars were banging. When he did a burn out we noticed it had a slight miss. We all are so glade he wasn't hurt..