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Thread: Lightning/Harley Davidson F150 Question

  1. #1
    Registered User
    Name: Tom


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    Lightning/Harley Davidson F150 Question

    Is there a difference between the HD ECU and the Lightning ECU from 2003? Is the factory tune stronger on the lightning for the difference in the upper pulley? I am not wanting to add boost, however if there is no tuning involved and then engine can handle it I will upgrade the upper to the factory lightning size.

  2. #2
    decipha
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    Its basically the same not muxh difference

  3. #3
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    Name: Kevin

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    You would have a better long term result by changing the lower to a +2lb pulley. Removing the upper pulley requires special puller tools and usually damages the removed pulley in the process. Plus the smaller lightning upper pulley is more prone to the belt slipping than the harley upper pulley because the harley pulley lets more belt wrap around it.

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