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  1. #1
    Join Date
    May 2006

    Thunderbolt IV Module

    I just purchased a new thunderbolt IV module b/c I am converting from the thunderbolt V setup. Built a new motor and want the set advance curve.

    My problem is I purchased just the module and it did not come with a wiring harness. Was wondering if anyone had a spare harness that I could purchase?


  2. #2
    Join Date
    Jun 2008
    I wasn't aware you set the advance curve with those. I always thought the trick was, to get a V-6 module. They only have 14 degrees of advance. But this could be old school.

  3. #3
    Charter Member # 55 Charter Member Griff's Avatar
    My Boats:
    ..........32........... Active Thunder
    Join Date
    Oct 2000
    I think what he is saying is that a TB IV has a fixed curve based on rpm. The TB V curve varies depending on kniock sensor readings.

  4. #4
    Join Date
    Apr 2002
    Like Griff said, the TB4 has a fixed curve. Not sure about the 5. The V-6, 14 degree modules throw in all the advance pretty early which could be good or bad depending on the application.

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