Donovan gear drive
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Donovan gear drive

  1. #1
    Senior Member
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    Default Donovan gear drive

    Anybody run one in their boat?
    Noisy or quiet?

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  3. #2
    Junior Member TE-678's Avatar
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    I run one in my 9 second jet, it
    makes a slight noise nothing you
    can't live with.
    The hard part is degreeing your
    cam in, pretty trickey.

    Paul

  4. #3
    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Just a head's up.
    In the last 3 years on here, I've seen a lot of guys who USED to run gear drives, especially the "loud" ones. The majority decided they didn't like them nearly as well after a few nearly continuous hours of 4,000+RPM drive-whine. These weren't short-blast drag boats but boats guys cruised the lakes and rivers on.
    They found they were a lot different that "the one in a car I have/had".

    Again, just a head's up as to just how much noise you may set yourself up for.

    Good luck to ya.

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  6. #4
    Some guy obnoxious001's Avatar
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    Quote Originally Posted by twntrbo View Post
    Anybody run one in their boat?
    Noisy or quiet?
    I don't think the Donovans are particularly noisy. I have assembled a few engines with them, including a turbo race engine where you might have a better chance of hearing noises. They are not super tricky to set up cam timing if you were going to use a degree wheel and do it the right way anyhow, otherwise it might leave you scratching your head. I set the crank at the "intake open" position on the wheel, and then turn the cam to .050" lift, and then slip the cover on, then double check to make sure the cam didn't move as I slipped the idler into place.

  7. #5
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    Thanks for the info,i really appreciate it.

  8. #6
    Nobody
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    Quote Originally Posted by SmokinLowriderSS View Post
    Just a head's up.
    In the last 3 years on here, I've seen a lot of guys who USED to run gear drives, especially the "loud" ones. The majority decided they didn't like them nearly as well after a few nearly continuous hours of 4,000+RPM drive-whine. These weren't short-blast drag boats but boats guys cruised the lakes and rivers on.
    They found they were a lot different that "the one in a car I have/had".

    Again, just a head's up as to just how much noise you may set yourself up for.

    Good luck to ya.
    Those "loud" gear drives have got to be the most obnoxious irritating things there is, can't understand what anybody sees in them, they don't sound anything like a blower whine whatsoever!..

  9. #7
    Senior Member Robert Jonsson's Avatar
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    the donovan is a nice piece. i know a couple people running them and they are quiet.
    Last edited by Robert Jonsson; 02-11-2008 at 07:50 PM.

  10. #8
    Nobody
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    Thumbs up

    The Milidon is also an excellent drive!..

  11. #9
    adjones419 Wet-n-Wild's Avatar
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    Quote Originally Posted by GoFastRacer View Post
    The Milidon is also an excellent drive!..
    Yes it is, Art.
    Adam
    Hallett 210

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