BBC motor plate measurements needed
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BBC motor plate measurements needed

  1. #1
    Boat Nut sleekcrafter's Avatar
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    Default BBC motor plate measurements needed

    Seems I never find it when I need them, looking for the front and back measurements for STD. deck BBC. I'm gearing up for new motor plates, I sold off my old set-up, figuring these were easy to come by.
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    Renegade jet tunneljet's Avatar
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    What dimensions exactly are you lookin for? Height, width, bolt location etc? I have plates in my cheyenne and could give you some #'s if I knew what you were lookin for.

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    It's been a while but I think these are right.
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  6. #4

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    front..should be BBC
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    Senior Member Boat 405's Avatar
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    Quote Originally Posted by RACER-X View Post
    It's been a while but I think these are right.
    Quote Originally Posted by RACER-X View Post
    front..should be BBC
    good info right there. Thanks RX Maybe the admin can make this a sticky for tech notes

  8. #6
    steelcomp was here
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    Good numbers there. Dowel dimensions are .6185-.6200 dia. I make my plates to register off the dowels, so all my dimensions reference from there. That way the bolts aren't really doing anything but clamping, and the dowels are in shear and taking the load. I know lots of guys just take the dowels out completely and let the bolts do the work, and that's fine for some folks, but it's really not the "right" way to do it.
    Just my .02
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    Boat Nut sleekcrafter's Avatar
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    Racer X....this is very close to what I'm looking for, I know there is one out there that has all the dimensions, and hole sizes. I just can't seem to find it. Thanks for the input guys
    Upper Midwest Power Boat Association
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  10. #8
    steelcomp was here
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    Sleek...what more do you need? Holes can be drilled 13/32", and all the dimensions are there. Everything on this dwg is referenced off crank C/L. I'll scan the dwg I have...maybe it'll be a little easier to follow.
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  11. #9
    Boat Nut sleekcrafter's Avatar
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    Quote Originally Posted by steelcomp View Post
    Sleek...what more do you need? Holes can be drilled 13/32", and all the dimensions are there. Everything on this dwg is referenced off crank C/L. I'll scan the dwg I have...maybe it'll be a little easier to follow.

    The one I recall seeing online, had all the dimensions of the engine, front and back. I want to build a one piece front plate.
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  12. #10
    jetboataholic HawaiianJet's Avatar
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    Quote Originally Posted by sleekcrafter View Post
    The one I recall seeing online, had all the dimensions of the engine, front and back. I want to build a one piece front plate.
    That is a one piece front plate, isn't it?
    HJ

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  13. #11
    Boat Nut sleekcrafter's Avatar
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    Quote Originally Posted by HawaiianJet View Post
    That is a one piece front plate, isn't it?
    Let me type slow for you HJ...I'm looking for the engine block diagram, with all the dimensions. I'm looking to do a little more than just wack some aluminum off and bolt it on my boat.
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  14. #12
    Senior Member Heatseeker's Avatar
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    Cool

    I've got these:


  15. #13
    Boat Nut sleekcrafter's Avatar
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    Quote Originally Posted by Heatseeker View Post
    I've got these:


    BINGO! Now that is what I was looking for Thank you Heetseeker
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  16. #14
    Senior Member Oldsquirt's Avatar
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    Quote Originally Posted by sleekcrafter View Post
    BINGO! Now that is what I was looking for Thank you Heetseeker

    Actually, you should thank "Chevy Power" as that is the book those were originally sourced from. (Ask me how I know ). You will note that they did a very poor job of identifying the locations of the 4 mounting holes on the front face of the block. I think Superdave said he had CAD drawings that included those points.

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