| certainly wont detonate as all that fuel will quench the burn and prevent detonation very effectively. This is also why we have to run rich mixtures to start with on forced induction engines - that extra fuel wards off detontion. Detonation is more closely tied into ignition timing than it is with A/F ratios as well. The JWT program runs about 18 degrees of timing advance at full load, of which wouldn't have been a problem at all with the 13psi or so that you say you were running. If the engine is run pig rich for extended periods of time (as if an injector were leaking), it will wash down the cylinder walls and contaminate the oil. Given enough time of this, it will break the oil down and begin eating the entire engine from the inside out - not just one bearing. If it is just running rich because of the tune or a boost leak, there is far less danger of contaminating the oil and all you have is lower power, greater chance of misfire (rich mixtures are hard to ignite), and a sooty bumper. It really sounds to me like your shortblock had a manufacturing problem. What made that one bearing fail over all the others? What was diferent about that one cylinder from all the rest?
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