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Gear drives

Discussion in 'The Garage' started by adamforsythe, Dec 3, 2005.

  1. adamforsythe

    adamforsythe 1/2 ton status

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    Hello,
    When I rebuild the top end on my engine I was thinking about replacing the timing chain with a "Noisy" Gear Drives. How much of a whine would it make on a 350 with a good size cam?
    Thanks
    Adam
     
  2. wicked jester

    wicked jester 1/2 ton status

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    They make plenty of noise, sound really kool but they transfer way to many harmonics to the cam shaft. A good double roller is by far a way better option.
     
  3. Beast388

    Beast388 1/2 ton status

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    While many will tell you to avoid gear drives because they "transfer harmonics to the camshaft", that theory has never been proven. How does one explain the fact that many engines came with factory timing gears.....many GM straight 6's for example?

    I have been running a noisy gear drive in my 388 for over 6 years now. This engine is used hard and still runs strong even with all of the "nasty harmonics" :rolleyes: ;) :haha:

    Here is an old thread on the subject: Clicky

    If you want to hear my gear drive, you can down load this wheelin' clip.

    http://oldvertdog.homestead.com/files/Mud_hole.mpg

    :D :D :D
     
  4. mtn. burb

    mtn. burb 1/2 ton status

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    Personally, I thought I was going to install that noisy gear drive.

    Until I pictured myself on the trail for 6 hours wishing I had not done it.

    Went with timing chain.

    Up to you. :D
     
  5. mudslinger99

    mudslinger99 1/2 ton status

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    My buddy had a 71 Chevy shortbed years ago we put one in and it was cool to listen to that thing.. We would pull hole shots for hours just so we could hear it and get it ready for the track :cool: His other truck blew the motor and he started DD the 71.. After a while he said the noise from the gear drive was getting annoying, so we fixed his other truck.. Now keep in mind he loved to ride in and listen to it for hours until he had to drive it everyday.. So that's something to think about if you're going to use it as a DD..
     
  6. ProJunkRacing

    ProJunkRacing 1/2 ton status

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    when i get a cam for mine i plan on doing that gear drive i would rather gear then a chain
     
  7. guido666

    guido666 1/2 ton status

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    I've got a built 454 with a Pete Jackson "Noisy" gear drive. I love it. I don't get annoyed by the noise at all. Of course it makes plenty of noise anyways with long tube headers, dual 2.5" exhaust with no crossover, and Flowmaster 40s, let alone the 40" Boggers.

    Bottom line is you can hear it whine. I think it sounds cool. I like the fact that it would be nearly impossible to break it, or for it to lose cam timing somehow. That alone is worth the gear drive to me.

    Get one!
     
  8. Shawn

    Shawn 1/2 ton status Premium Member Author

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    I have one for sale (hardly used) if you're intersted. $50 shipped
     
  9. sweetk30

    sweetk30 professional hooker Premium Member

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    if fuel injection it will mess with the nock sensor.


    my friend has a noisy in a 63sbstep side. stight headers. you can still hear it. i had a quiet in my truck. was just right for me.
     
  10. ProJunkRacing

    ProJunkRacing 1/2 ton status

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    quite possibly does that require a different timing cover?
     
  11. readymix

    readymix 3/4 ton status

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    AFAIK...Never been proven one way or the other. This is one of those topics where the opinoins fly without proof. Don't believe everything you read.
    I'll be the first to admit that i have not tried it and i have no idea what would happen.
    Read up on ThirdGen and you will find that some of the TBI and TPI guys over there run them successfully.
     
  12. SchnorrCS

    SchnorrCS 1/2 ton status

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    IIRC it will fit under the same timing cover as a chain. I think...
     
  13. ProJunkRacing

    ProJunkRacing 1/2 ton status

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    yeah that is what would be make or break for me
     
  14. SUBFAN

    SUBFAN 1/2 ton status

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    The Pete Jackson types fit under the stock cover....
     
  15. GotLabs

    GotLabs 1/2 ton status GMOTM Winner

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    I have noticed that some manufacturers say "some machining may be required". What exactly needs to be machined, or can it be fitted with a dremel or grinder?
     
  16. sweetk30

    sweetk30 professional hooker Premium Member

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    the ideler gears have a stub on the back side to ride agains the block. thay need to be ground to set the depth of the gears to the main gears. easy to do.
     
  17. Shawn

    Shawn 1/2 ton status Premium Member Author

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    No, fits under stock timing cover. Looks like a Pete Jackson.
     
  18. ProJunkRacing

    ProJunkRacing 1/2 ton status

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    hmm if you got it in a few weeks i just might how loud is it and how worn >?
     
  19. 88trailblazer

    88trailblazer 1/2 ton status

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    I have a "quiet" gear drive on my 78k10. The sound is noticable but not unbearable. Sounds like a honda in reverse. :D No complaints so far though.
     
  20. Muddytazz

    Muddytazz 1 ton status

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    I just installed a noisy gear drive in my new built SB350 and with the radio going, and the 40 series flowmasters and headers, and tires, the gear drive is hardly noticable.
     

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