Quote Originally Posted by joecar View Post
Yes, Heywood says exactly that... leaner than stoich burns hotter (provided there is sufficient fuel, otherwise it won't burn at all... but that's pretty lean)... and the N2 (nitrogen molecule) requires quite a high temperature to oxidize

(...lol... otherwise our 79% N2 atmosphere would oxidize with each and every open flame...).
Lucky for us so far.....a % or 2 more O2 and we are in deep doo doo. :(

Glad my memory is serving me well after countless ales......

The lean/rich scenario is used a lot in go-karting. Hand on the needle entering the straight, lean it out for power, then turn it back in before the piston and the bore become one!