Quote:
Originally Posted by ttimbo
It would tell you whether, as the result of the tuning box or tune, the ratio of air to fuel in the mixture was too lean. Which is what causes detonation. Yes, it's a subject in itself worth researching. But if a tuning box does not appear to connect to the car's sensors, then it is likely the additional power is being achieved through adding boost alone, without compensatory fueling....which can lead to a very ugly "BANG"!
That's why I like to check if tuning companies are providing a full set of data, to see if they are safe. If not, then — personally — I stay well away from that company.
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This happened to me years ago with my R33 skyline. Basically the car was running too lean. The tuners were incompetent and I was non the wiser. I was using an SAFC II box which only monitoring air fuel ratios. One night I was gunning it down one of the back roads and I heard a loud and bang from the engine. That was it.
Ttimbo what tuning have you got on your M?