Pulley

Discussion in 'The Big Chill' started by Jim Blackwood, Nov 18, 2009.

  1. Jim Blackwood

    Jim Blackwood Well-Known Member

    I need a big pulley for the A6 compressor. I want to cut it down and groove it for an 8 rib serpentine belt. Anyone remember seeing one with a real big pulley on it?

    Jim
     
  2. copperheadgs1

    copperheadgs1 copperheadgs1

    I know of one in a Junkard near me but they want $100 for it. No idea if it is anygood. I hid it in another car before I asked for price. Not sure if I could even find it again. George N has posted before that he had some bigger pulleys. Check with him.
     
  3. Jim Blackwood

    Jim Blackwood Well-Known Member

    Thanks. I'll see if I can find him in the member's directory.

    edit: Nope, couldn't find him.

    Jim
     
  4. izanurse

    izanurse Platinum Level Contributor

    Not to hijack the thread, but how's project badass coming?
     
  5. lsrx101

    lsrx101 Well-Known Member

    Jim,
    Somewhere I ran across a supplier selling a grooved (serpentine) pulley for the A6. I tripped across it (them?) en-route to finding something else so I didn't even think to save it or get the specifics. :rolleyes: I know it's out there, so I'll try and locate it. It was a year or more ago.
    Most folks swap in a Sanden or Seltec compressor with a serpentine system, but I'm all for keeping the mighty A6 if possible.

    From another post:
    They made one that was 6-7/8" in diameter and that's the one I'm looking for. Supposedly used on GM trucks (not pickups) and Case & Massey Ferguson tractors. Ever seen one?

    I can't say I've ever seen a pulley that large on an A6, but there may very well be one. I will keep my eyes open. I'm only aware of 2 pulley sizes for the A6, both are in about the 4.5" range.

    I would think larger trucks and tractors would actually need a smaller pulley to keep compressor RPMs up because their engine RPM would tend to be lower overall.
    Then again, maybe the larger pulley was used because those engines often run at closer to full speed for long periods and the larger pulley reduced engine load while keeping the comp. at a comfortable rpm??
    Dammit Jim, you're making me think too much. It has my curiosity going and making my head hurt. :idea2:

    You may want to post this question over at www.autoacforum.com . If there was ever a larger pulley used on an A6, someone there would probably know.
     
  6. Jim Blackwood

    Jim Blackwood Well-Known Member

    Thanks, that's encouraging. I had seen those big pulleys at antique tractor shows but it was way before that had any significance to me. Considering that they have a 1 seat cabin, run at a constant 2400 rpm, and often have a large lower pulley I think that makes sense. I want to run the thing fast though. bohica2xo over on autoacforum suggested shrink fitting a sanden serp pulley over the A6 pulley which is a good idea. But I still have to get another A6 pulley anyway and the sanden pulley would be larger. Anybody have an idea how fast you can safely turn the A6?

    Allen, the MGB-Roadmaster is coming along very well. Pete should be scheduling another work weekend around the first of the year sometime and Rick is installing the new upholstery. We have a new Summit radiator and should have it out on the road in front of Pete's house (Sidney, Ill.) on that weekend. I'll need to talk to Jim Weise about tuning the carb at some point but we expect to have it ready for this summer's show.

    Jim
     

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