Any math experts in the house...
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Any math experts in the house...

  1. #1
    Senior Member H20MOFO's Avatar
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    Default Any math experts in the house...

    One of my winter projects is to try to level my motor out a little more. At a glance(to me), it looks like I'm about 5* nose up. I'd like to nose down 7 or 8*. Anyone have a educated guess of how much I should take off the front plate? I was thinking about 1/2"..
    Another Hot Boat refugee

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    Resident Ford Nut Sleeper CP's Avatar
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    Nose down ???

    Can't say I've ever seen that, why ?

    S CP

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    Senior Member H20MOFO's Avatar
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    Quote Originally Posted by Sleeper CP View Post
    Nose down ???

    Can't say I've ever seen that, why ?

    S CP
    I'm probably just being anal...Floating in the water, my engine has about a 10-12* lean(backwards). Maybe that's normal, I dunno.
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    Living in a cage of fear thatguy's Avatar
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    I see You have a rail kit.

    I flipped my front mounts over on my 4 point stringer mounts and leveled mine out. I think it is more than a half inch difference. If they are 1/2" or so offset, then it actually lowered it an inch.

    What is the length between front and rear plates at the bottom? I can figure out how much equals a degree for You.
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  7. #5
    Senior Member H20MOFO's Avatar
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    Quote Originally Posted by thatguy View Post
    I see You have a rail kit.

    I flipped my front mounts over on my 4 point stringer mounts and leveled mine out. I think it is more than a half inch difference. If they are 1/2" or so offset, then it actually lowered it an inch.

    What is the length between front and rear plates at the bottom? I can figure out how much equals a degree for You.
    Thanks...it looks to be 24ish(plate to plate). I just want to tilt it down about as much as it's tilted up now.. fwiw.
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    Senior Member Boat 405's Avatar
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    You will have to trim the rear mounts as well
    Boat 405.

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    Senior Member gregb's Avatar
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    Just to make sure we're on the same page, you want to go from 5 up to 7 down for a change of 12 degrees? Need the distance from the rear mount where it will pivot to the front mount.

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    Quote Originally Posted by H20MOFO View Post
    One of my winter projects is to try to level my motor out a little more. At a glance(to me), it looks like I'm about 5* nose up. I'd like to nose down 7 or 8*. Anyone have a educated guess of how much I should take off the front plate? I was thinking about 1/2"...
    I can figure it for you if you can give me the length between the plates but remember that you will have to lower the back of the engine also since the pivot point becomes the rear motor plate and to lower the front of the engine will raise the driveline since it behind the pivot point. So you can figure it by making the u-joint the pivot point and measuring to the front plate. Once a figure is calculated on the front plate you can take the ratio of the rear plate position compared to the total length and take that percent of the the amount you cut off of the front plate and then take that off the rear. I know you probably know that but I AM A MATH GUY so lay some lenghts on me and I can do the trig.
    Last edited by jungledave; 11-28-2009 at 06:28 PM. Reason: grammer

  11. #9
    LIQUID QUARTER MILE Pro Mod's Avatar
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    start at 5/16 then go on little by lit
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  12. #10
    Senior Member H20MOFO's Avatar
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    Quote Originally Posted by gregb View Post
    Just to make sure we're on the same page, you want to go from 5 up to 7 down for a change of 12 degrees? Need the distance from the rear mount where it will pivot to the front mount.
    I'm thinking 7* down from up 5*...
    Another Hot Boat refugee

  13. #11
    Senior Member Oldsquirt's Avatar
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    Quote Originally Posted by H20MOFO View Post
    I'm thinking 7* down from up 5*...
    I'm thinking you should leave it alone. Your u-joints are not gonna be happy with that 12 degrees.

  14. #12
    Senior Member jetboatperformance's Avatar
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    Kreg if you drop the front it will "withdraw" even more D/L than you currently have which is very "marginal" Here again (below) is the original mock up for reference , suggest you Start fresh , loosen every thing and work off the "D/L alignment" as your starting point to garner what you want to end up with Always here to help if you need it Tom

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    Senior Member H20MOFO's Avatar
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    Quote Originally Posted by Oldsquirt View Post
    I'm thinking you should leave it alone. Your u-joints are not gonna be happy with that 12 degrees.
    t
    I realize 5+7 =12 but I only plan on moving chit 7*. I want to end up about 2* down(crank relative to pump shaft). Maybe I'm nutz..
    Another Hot Boat refugee

  16. #14
    Senior Member Oldsquirt's Avatar
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    Quote Originally Posted by H20MOFO View Post
    t
    I realize 5+7 =12 but I only plan on moving chit 7*. I want to end up about 2* down(crank relative to pump shaft). Maybe I'm nutz..

    So you aren't talking about going from 5* up to 7* down? Thats what it sounded like. Still think you are wasting time and energy. I won't say you are nutz....but........... Even at 7* (why not just make it parallel to stringers?) you will need to get the height just right to keep the u-joint angles even.

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