Quote:
Originally Posted by Clap135
Why does the jb4 drop boost now with its new autotuning? I though the ecu takes care of everything from a timing point of view? You implented a system that goes AGAINST everything you preach.
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First I didn't design the system but I can clearly understand how it works. Larger timing dips indicate the DME is having a hard time finding a plausible timing curve for the boost requested / octane provided. You can remedy that by reducing boost pressure as the JB4 autolearning does or you can lower the advance limiter so low that it's forced to operate under the knock threshold. For every boost curve, mods/conditions, and octane there is a perfect timing curve and the DME will do its best to find that. But that doesn't mean you can run 20psi on 87 octane. No timing curve will allow that to work. As the DME starts to become less stable with timing you know its time for less boost or more octane.
Mike