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Definitely. Always remember when you burn that fuel in wot or more aggressive driving it's so much harder to make up for it when you are Eco driving. You have to average a much higher number to compensate for it.
I'm running an innovate afr gauge and its limit is 21.9 and the highest I've seen it go in lean burn is 21.8. So you are spot on with the 22(I'm running a p07) another thing you could try is pick a speed you travel the most on the highway, say mine is 65, record your rpms at that exact speed and have vtec engage at that rpm along with lean burns highest reading. Then as load increases take your afrs down safer and safer. I'm guessing you run a p28 or equivelant. I have no experience tuning but I am somewhat familiar with it. Not sure of what I said can be done. You would be better at telling me. I'd love to get into tuning like this.
Would be awesome to see you pull off some 50+ tanks without the vx trans and egr.
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Burn lean and prosper \\ //
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