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Thread: Noisy Gear Drive
          
   
   

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  1. #1
    Limey is offline CHR Member Visit my Photo Gallery
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    Question Noisy Gear Drive

     



    I'm building a 302 up for a friend, and he's given my all the parts to do it, including a "noisy" gear timing drive. I've opened the box, only to find no installation instructions, or makers name. (must be Chinese!) He can't remeber where he got it from either.
    Anyhow, am I right in thinking that the intermediate gears just lie between the crank and the cam gear, with no other support than the front cover and block to stop them moving backwards and forwards?

  2. #2
    BBMonte's Avatar
    BBMonte is offline CHR Member Visit my Photo Gallery
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    get a timing chain
    some times i do feel like i have a crayon in the brain
    1981 Chevy monte carlo + Chevy 396 = crazy FUN!

    like uncle ben says.... "With great power comes great responsibility" drive safe and drive FAST!
    dont be a REV Mechanic damit!!!

  3. #3
    R Pope is offline CHR Member Visit my Photo Gallery
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    Like BB sez. It's a whole lot easier to chuck that POS in the garbage now, rather than two days after you fire up the engine.

  4. #4
    IC2
    IC2 is offline CHR Member Visit my Photo Gallery
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    A good double roller timing chain will make your friend much happier!!

    Summit lists many for SB Fords: http://store.summitracing.com/egnsea...=KeywordSearch

    Racers don't use them for a reason(s)!!
    Dave W
    I am now gone from this forum for now - finally have pulled the plug

  5. #5
    mopar34's Avatar
    mopar34 is offline CHR Member Visit my Photo Gallery
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    Leave the gear drive in the box and get a chain. If your friend wants whine, tell him to get a blower.
    Bob

    A good friend will come and bail you out of jail....but a true friend will be sitting next to you saying..."Damn....that was fun!

  6. #6
    Limey is offline CHR Member Visit my Photo Gallery
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    That's a strong reaction! I guess you guys have a story to tell...... did the gears trash the timing cover, or some other mayhem, or just got annoying?

  7. #7
    IC2
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    http://www.fordmuscle.com/forums/mus...ear-drive.html

    This tells the story pretty well

    In theory, they appear to be a good idea. In practice and for a daily driver, not so hot. Then - there's the annoying noise. Then you have an unknown manufacturer for this product - and is it a Chinese POS?

    My choice for a performance engine now would be a Gilmer belt drive, but a good double roller chain and gear are the best bet and a well proven design for a SB Ford or any other normally rodded engine.
    Dave W
    I am now gone from this forum for now - finally have pulled the plug

  8. #8
    pat mccarthy's Avatar
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    Quote Originally Posted by Limey
    That's a strong reaction! I guess you guys have a story to tell...... did the gears trash the timing cover, or some other mayhem, or just got annoying?
    well i did not chime in i will not build a engine for any one with one in it .i have built race and street engine .i have not seen a good use for one in any engine i have built
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

  9. #9
    firebird77clone's Avatar
    firebird77clone is offline CHR Member Visit my Photo Gallery
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    I have had a Pete Jackson gear drive on the wish list for YEARS...

    Until I found out that they transfer unwanted harmonics which actually hurts timing.

    Double roller chain is the way to go. They last and last, and they absorb nasty harmonics. If you like noisy, then get cherry bombs. If you like whiney, then get married. Er, I mean, get a blower.
    .
    Education is expensive. Keep that in mind, and you'll never be terribly upset when a project goes awry.
    EG

  10. #10
    techinspector1's Avatar
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    Although I hate these things because of the noise/harmonics and because they are 100% POSER, I'll show installation instructions published by Summit....
    http://static.summitracing.com/globa.../sum-g6711.pdf
    It's interesting to note this verbage at the bottom of the instructions. It should give you a clue about the harmonics set up in a gear drive assembly.....
    "NOTE: This timing setup requires use of a harmonic balancer,
    DO NOT substitute an aluminum hub."
    Last edited by techinspector1; 10-14-2008 at 02:39 PM.
    PLANET EARTH, INSANE ASYLUM FOR THE UNIVERSE.

  11. #11
    Sinister's Avatar
    Sinister is offline CHR Member Visit my Photo Gallery
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    I agree with going to a double-roller timing chain, much better choice. I'm fond of the Cloyes double-roller with 9 keyway positions.

    As far as the noise of a gear drive....it's not too noisey, yall are just too old!
    I ain't dumb, I just ain't been showed a whole lot!

  12. #12
    kitz's Avatar
    kitz is offline CHR Member Visit my Photo Gallery
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    I ran an original Pet Jackson in a 1973 SBC. Whined, I was 18 and loved it, and never had a problem. As a PhD now I have no doubt they introduce unwanted and likely damaging harmonics. But I was using it with a solid lift cam which by nature will reduce these. I abused the shnokers out of it. Use a chain or belt.

    Kitz
    Jon Kitzmiller, MSME, PhD EE, 32 Ford Hiboy Roadster, Cornhusker frame, Heidts IFS/IRS, 3.50 Posi, Lone Star body, Lone Star/Kitz internal frame, ZZ502/550, TH400

  13. #13
    Ken Thurm's Avatar
    Ken Thurm is offline CHR Member Visit my Photo Gallery
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    I use Donovan gear drives on everything, I don't know why, I guess old habits are hard to break. Mine don't make any noise.
    Ken

  14. #14
    Limey is offline CHR Member Visit my Photo Gallery
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    Thanks for the feedback guys, I'll get my freind to change his mind about this part!

  15. #15
    pat mccarthy's Avatar
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    Quote Originally Posted by Ken Thurm
    I use Donovan gear drives on everything, I don't know why, I guess old habits are hard to break. Mine don't make any noise.
    Ken
    well that type has no floating gear set in it the jackson type has the idle gears banging around . were your s just has one . the belt is a much better way to go$$$$ but it is hard to beat to good chain set for the money
    Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip

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