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Thread: Spark Maps Question

  1. 04-10-2006 #1
    zinner
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    Spark Maps Question

    So I have noticed that the high and low octane spark maps are the same. How do I get the PCM to use the high octane map?

    I want to alter the high octane map and try 93 octane. Thats the end game.
    Last edited by zinner; 04-11-2006 at 01:10 PM.
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  2. 04-10-2006 #2
    Chris@HPTuners
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    The PCM interpolates between the high and low octane spark tables depending on the amount of long term knock it has detected (this is called knock learn or octane scaler).

    If you set the tables the same then no matter how much knock you get the PCM will always lookup the same amount of timing.

    Typically the high octane table is set a few degrees higher than the low octane to allow learning down.

    Chris...
    I count sheep in hex...
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