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  1. #1
    Registered Prater's Avatar
    My Boats:
    1985 Formula 357 SR1
    Join Date
    May 2004
    Location
    Blanchard, OK
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    1,218

    Modified Transoms

    Has anyone modified their transom to achieve better performance? If so lets see some pics. I am thinking of adding 12 inches to the transom to take the drives farthur back from the boat, I have to replace the transom anyways. Will this gain anything? Any input is appreciated. The boat is a 1979 Formula 255 Liberator with twin Bravo's.

    Thanks
    Steven

  2. #2
    VIP Member VIP Member JaayTeee's Avatar
    My Boats:
    2002 baja 33 o/l 575sci's
    Join Date
    Nov 2002
    Location
    ankeny,ia.
    Posts
    3,075

    Re: Modified Transoms

    An extension box accomplishes what
    your talking about.

  3. #3
    Registered Prater's Avatar
    My Boats:
    1985 Formula 357 SR1
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    May 2004
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    Blanchard, OK
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    Re: Modified Transoms

    Yes I know that, just wondering if anyone has done it different. Extension box is $1500 used times two gets pretty expensive. I am just looking for ideas before I start the transom work.

  4. #4
    Registered squick's Avatar
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    Dec 2004
    Location
    Austin,TX
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    75

    Re: Modified Transoms

    I guess that's one way to cure the 2 foot itus.

  5. #5
    Platinum Member Platinum Member mcollinstn's Avatar
    My Boats:
    1991 F311SR1
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    Sep 2001
    Location
    tn
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    5,455

    Re: Modified Transoms

    outboard boats have been doing this forever,
    build out the motor box, that is.

    On an i/o I guess you can build out until you hit the oilpan on the notch.. Any more will require leaving the motors where they are and using a longer input shaft (like the Imco one).

    Don't forget that you'll also need to extend the stringers all the way to the "new" transom, and you'll also need a new way to tie the corners together.

    You'll spend a lot more than $1500 x 2 in time and sweat trying to do what you suggest.
    I see London, I see France...

  6. #6
    VIP Member VIP Member JaayTeee's Avatar
    My Boats:
    2002 baja 33 o/l 575sci's
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    Nov 2002
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    ankeny,ia.
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    3,075

    Re: Modified Transoms

    Quote Originally Posted by mcollinstn
    You'll spend a lot more than $1500 x 2 in time and sweat trying to do what you suggest.

    Exactly.

  7. #7
    Registered Prater's Avatar
    My Boats:
    1985 Formula 357 SR1
    Join Date
    May 2004
    Location
    Blanchard, OK
    Posts
    1,218

    Re: Modified Transoms

    Thats the input I need, thanks for the help. Just figured while the transom and stringers were being replaced it would be a good time to do this if it were to happen.

  8. #8
    Charter Member Charter Member IRONMAN's Avatar
    My Boats:
    Pantera 28 Formula 271
    Join Date
    Jan 2001
    Location
    south east of dome island
    Posts
    1,172

    Re: Modified Transoms

    look at the BAM marine site, he added a few feet to a cig
    The Rougher The Better

  9. #9
    Registered JPD Motorsports's Avatar
    My Boats:
    scratching the surface!
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    Sep 2003
    Location
    Flower Mound, TX
    Posts
    1,598

    Re: Modified Transoms

    prater who is going to do your transom and stringers?

  10. #10
    Registered Prater's Avatar
    My Boats:
    1985 Formula 357 SR1
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    May 2004
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    Blanchard, OK
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    1,218

    Re: Modified Transoms

    Doing the work myself


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