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Thread: Alloytec octane requirements

  1. #21
    Joe (Moderator) joecar's Avatar
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    Knock learn strategy is very short term... ECM detects knock and starts using weighted average of HO and LO spark tables with the weight sliding toward the LO table... then if it sees no more knock it slides back up to the HO table... probably within 10's of seconds or less.

  2. #22
    Lifetime Member Boost's Avatar
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    Ok, thanks Joe. I am going to have to try 89 octane (midgrade) and listen for any knock.
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

  3. #23
    Lifetime Member Boost's Avatar
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    Stayed on the 87, it finally got used to it and runs perfect without any knock now. May be missing a few horses though.
    '12 Caprice PPV 6.0 L77 - daily transportation
    8.7 @ 84 (1/8 mile) bolt-ons

    '02 Silverado RCSB 5.3 L59 - regularly street driven
    8.2 @ 86 (1/8 mile) stock cam and spray
    8.6 @ 84 (1/8 mile) cam and heads no spray

    Our YOUTUBE CHANNEL featuring the Silverado

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