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Thread: Ok I got to ask

  1. #1
    Senior Member MASTER BUILDER
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    Ok I got to ask

    This is going to sound like a dumb question I have 671 blower 12% underdriven 38 tooth on the top. I have asked a lot of pople why some blowers have that whining sound and mine dose not, you could here it but some cars you could here from two blocks away. I have a 350 sbc roller motor I even put noisy gear drive in and still can't get that nasty sound. What do you think.
    Thank you
    CPT.RON 8) 8) 8)

  2. #2
    Member JUNIOR BUILDER
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    My guess would be the drive gears in the front of the blower. Maybe they are stock GM gears or something else, but I believe that's where that sound comes from. My .02. 8) JB

  3. #3
    Member JOURNEYMAN
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    I alway's thaght the whining noise came from the belt. :?:

  4. #4
    Senior Member EXPERT BUILDER
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    Quote Originally Posted by jmech
    I alway's thaght the whining noise came from the belt. :?:
    you are right..it is from the air trap between the belt and pulley;;that is what a blower shop told me anyway;they said the tighter you run belt then the louder the wine.just remember that belt gets tighter as it gets hotter so want to make sure you don't tighten belt to tight when cold or belt will be breaken when warmed up from being to tight after warmed.
    please don't take my word completely on this subject am just passing information i was told by a blower shop

  5. #5
    Junior Member SHOW GUEST
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    blower whine

    Quote Originally Posted by hotrodharley
    Quote Originally Posted by jmech
    I alway's thaght the whining noise came from the belt. :?:
    you are right..it is from the air trap between the belt and pulley;

    That is where the whine sound comes from. Most of the street cars with a blower, have a 1/2 pitch belt. The teeth on the belt are flat. When the teeth mesh with the pulley, the air is smashed and there is your whine.

    An 8mm pulley and belt are of a rounded shape, and are not nearly as loud.


  6. #6
    Senior Member EXPERT BUILDER
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    That is 100% correct. I have a 57' Chevy with a 6/71(1/2" pitch pulleys) on my 427BBC and the tighter I tighten the belt the louder the whine! Thats music to my ears
    If a 5 lb hammer can't fix it,it must be electrical
    Keep the shiney side up! 8)
    http://www.racingjunk.com/profile/85221

  7. #7
    Senior Member RACING JUNKIE
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    Re: blower whine

    Quote Originally Posted by 1travis
    Quote Originally Posted by hotrodharley
    Quote Originally Posted by jmech
    I alway's thaght the whining noise came from the belt. :?:
    you are right..it is from the air trap between the belt and pulley;

    That is where the whine sound comes from. Most of the street cars with a blower, have a 1/2 pitch belt. The teeth on the belt are flat. When the teeth mesh with the pulley, the air is smashed and there is your whine.

    An 8mm pulley and belt are of a rounded shape, and are not nearly as loud.

    X2, you can't even hear my s/blk 1471 buzzard catcher blower, even at overdrive with the 8 mm drive, here's a vid, it's just a little oil leak in the covers from adjusting the valves, easy fix.I'm behind the camera and that's my motor in the ugly Dodge.

    Zip.

    http://video.google.com/videoplay?do...24568453485455

  8. #8
    Senior Member EXPERT BUILDER
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    Sounds great Zip. But whats up with the sbc in a Dodge :shock:
    If a 5 lb hammer can't fix it,it must be electrical
    Keep the shiney side up! 8)
    http://www.racingjunk.com/profile/85221

  9. #9
    Senior Member EXPERT BUILDER
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    Re: blower whine

    Quote Originally Posted by zipper06
    Quote Originally Posted by 1travis
    Quote Originally Posted by hotrodharley
    Quote Originally Posted by jmech
    I alway's thaght the whining noise came from the belt. :?:
    you are right..it is from the air trap between the belt and pulley;

    That is where the whine sound comes from. Most of the street cars with a blower, have a 1/2 pitch belt. The teeth on the belt are flat. When the teeth mesh with the pulley, the air is smashed and there is your whine.

    An 8mm pulley and belt are of a rounded shape, and are not nearly as loud.

    X2, you can't even hear my s/blk 1471 buzzard catcher blower, even at overdrive with the 8 mm drive, here's a vid, it's just a little oil leak in the covers from adjusting the valves, easy fix.I'm behind the camera and that's my motor in the ugly Dodge.

    Zip.

    http://video.google.com/videoplay?do...24568453485455
    Hey Zip what does that thing run?

  10. #10
    Senior Member RACING JUNKIE
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    I played the video of the bad ass motor you have Zip. Got me in trouble!! I had the volume up all the way up on the computer(not on purpose), woke the whole damn house up!! So glad I am the King in my castle! :roll: :roll:


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