I would only try NOS if I had a giggle giggle moment with a tired 318 in like a old dodge truck that I wanted to blow up (I don't see that happening), or if I was in a 6 or 7 second class and I needed it. So no, I haven't tried. My brother ran NOS in his chevelle. I would lose respect for my self if I used it, but that's just me. To each their own....
