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Hi, new tuner here. I was doing some data logging in my car and did some full throttle runs and I was surprised to see the EQ ratio was very lean at WOT ~0.7-0.66. Is this even possible? Is it possible for the engine to run at over 40% leaner than stoich? Or is the EQ ratio reading actually lambda reading, which would make more sense.
Data logged using OBD Auto Doctor
It looks like lambda, if your ratio is air/fuel vs stoic it is lambda. Very unlikely peak power would be tuner that lean and run consistently.