It was a pain sorting through this thread.
EGR diesel and gas need to be separated to study effects and Ideas posted correctly.
This thing is a jumble and often side tracked me into wrong thinking by mixed petrols and oils posts.
Focusing upon just gas since the Diesel world has already whipped the issue fully; it is a question of how much returned gasses and heat and at what timeto reintroduce them.
Im not understanding how a "normal" lean burn vehicle would benefit from vapor that has utilized 97% of its potential energy already with little left to offer except its heat.
I read a post awhile back where a standard engine "not lean burn" was using heated air to create a lean burn. with fuel line heater, intake heaters and reburn system. But !! This was also linked to a potential water injection and possibly hydrogen system.
Making fuel a unstable mix is troublesome, predetonation is not a recomended practice.
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