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Thread: Amps per square inch?

  1. #11
    Join Date
    Oct 2009
    Location
    Stanfordville, NY
    Posts
    799
    Good definition, Carter. How many times have we posted this formula over and over again? It should really be a sticky since it's so important.
    1998 Explorer 4x4, 4.0
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  2. #12
    Join Date
    May 2012
    Posts
    6
    Hi, I have a doubt...

    in this math: (3.5x3.5=12.25-.25x.5= 6)

    why is this? .25x.5????

    .5 is the amps per sq inch?
    and what is .25 for?

  3. #13
    Join Date
    Aug 2008
    Location
    Dallas, TX
    Posts
    490
    From the formula, I would say it is a buffer to ensure you run just under .5 Amps per square inch during most all conditions. Shoot for 6 and occasionally end up with ~6.2 and it's still acceptable. At least according to the example above.

    Of course if you really wanted to get crazy with numbers then plug in The Golden Mean 1.618:

    ( (3.5x3.5) / 1.618 ) / 1.618 = 4.68 Amps

    which is 0.38 A/in sq.

    Which is right smack in between 0.25 and 0.5 A/in. sq.

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