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  1. #1
    Senior Member alek72us's Avatar
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    Default cam question

    how do i go by picking out what kind of cam i want in my boat.

    its a 5.7 merc 1989 alpha one gen one. engine 5.7 roller .020 over and if i can find a set vortec heads.

    right now about 46 mph 4300 rpm. bigger better faster

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  3. #2
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    Default Cam

    call don at motor machine in sac he builds some of cp perfrmance motors and is very noligable he hooked me up with a nice set up on my bb chevy

  4. #3
    Senior Member GT Jets's Avatar
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    Quote Originally Posted by alek72us View Post
    how do i go by picking out what kind of cam i want in my boat.

    its a 5.7 merc 1989 alpha one gen one. engine 5.7 roller .020 over and if i can find a set vortec heads.

    right now about 46 mph 4300 rpm. bigger better faster
    Your prop is too tall....IMHO, let her buck at just a tick over 4600 R's.

    What prop are you currently running and what does the boat weigh?

    You have to be careful what cam you use because the Alpha I is a dog lower, not a cone clutch like the Bravo I...Sometimes they're hard to get out of gear if too lumpy of bumpstick is used...

    What gen. heads you looking for?..I can tell you that we made 326 HP at 5100 RPM with a rebuilt '98 5.7 Merc with second gen Vortec's, it's going in a 20.5' carrera Elite open bow with a 1.50:1 Alpha I second gen., and if it don't run over 65 I'm gonna be pissed..

    I'll see about getting the cam card this W/E...I have a set of early Vortec's too.

    GT
    GT


    Quote Originally Posted by Quickjet View Post
    Put a 300 on the back of it, Flywheel it and a nosecone. $15,000 later you'll have a 65 mph pile of shit......

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  6. #4
    Senior Member alek72us's Avatar
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    i dont know what my boat weighs but that is what it is a 1989 carrera 205 elite open bow. my prop is 15 1/4 with a 19 pitch. i dont know the differances of the vortec i want them for a 80's roller cam motor gen one. and not aluminium. what do u want for ur heads?

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