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Thread: What exactly does Variable cam spark do?

  1. #1

    What exactly does Variable cam spark do?

    Does it add or remove ign timing? how does its 2D graph scale in terms of values? It reads as if its one degree but that cant be possible what am i missing?

    I'll attach pics but im too wiped out now to do it
    Last edited by cam; 11-25-2012 at 02:13 AM. Reason: pics coming soon

  2. #2
    Senior Tuner
    Join Date
    Apr 2007
    Posts
    1,104
    it adds to the total ignition timing. if you shut off the vvt side of the tune, it disables this, or you can zero it out. me personally. i add it into my total final timing figures when im dealing with the grand scheme of things. then again, i also factor in flex fuel timing as well as i switch between e85 and 91 octane a lot. im one of the weird ones that does this.
    The most hated, make the most power.
    93 Ranger. 5.3 D1X. 1069hp.