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  1. Forced Induction
    On my naturally aspirated M54, I'm getting a consistent metallic 'rattling' sound between 5000-5500 rpm on full throttle. It disappears above that. I have an Innovate LC-1 and my lambda is 0.87-0.89 during the time the noise appears, and goes steadily down to 0.85 (12.5 AFR) on red line. I'm...
    detonation pinging
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