Originally Posted by bjuice
I will try to give a good idea without being to drawn out. You will get the idea... Here is my understanding.....when excessive amount of raw fuel enters the cylinder it washes down the coat of oil..the heat build up is so great it cannot dissipate fast enough..the ring lands will lift because of heat..taking out oil rings causing oil to enter cylinder causing detonation...( meltdown )..This happens at a accelerated rate when using Nitrous because of amount fuel used thru the carb and fuel selenoids from the Nitrous.. This is very short version.
Correct. Basically the motor can't burn all the fuel in the cylinder.
That's why it's so important to read the plugs on a nitrous motor. If it's rich you can either add more nitrous or take away fuel. All is done by changing the jets. Simple fix, but not so simple to figure out. The hard part is every engine is different. I can tell you my tune up and it may work and it may not work or your motor even if they are the same motor.
You can see a pic of the piston I posted and see the ring land is gone. Well it's actually burnt off lol, but if you catch it before that you can see where it is rolling and not holding the rings in place. In my case the fire was from the oil in the cylinder and once the piston burnt through a lot more oil comes up and catches on fire.
One thing about a nitrous motor you have to be careful is when starting the motor. If you have a solenoid that is leaking ANY it will put raw nitrous in the motor and when you start it can explode. (ALWAYS USE A FILTER ON YOUR NITROUS LINES) You should always cut off a valve and bleed the pressure off before you shut the motor down AND have a seperate swith for ignition and start. That's why you see guys turning the motor over a good bit then turning on the ignition on a nitrous motor. Actually a lot of guys use plastic / nylon intake bolts on the intake so they will break loose without destroying everything. I've seen some really UGLY nitrous explosion that destroy the entire top of the motor and hood.