In doing as much reading as I can, I keep seeing how running rich is so much worse than going lean, that running a little fat can lift ring lands. I've been running FI for years, we've never hurt a motor making a pass or two with a fat A/F. Granted, they slow down, but a 10.0:1 pass on a blower car isn't gonna blow **** up. Why is it different on N2O?

Just trying to understand.

 

My understanding is that the mixture will creep under the ring land and ignite. Something's gotta give.

 

Why more so on spray than any other type of setup? Air/fuel is air/fuel, doesn't matter how you administer it. I have always understood that excessively rich tunes will wash the rings out over time, but from what I'm reading here it sounds like 1 pass below 11:1 is like sudden death.

 

I gree and once the ring lang goes it often turns into a blow torch effect area, then the cylinder walls need attention and so on...
Robert