440 871 supercharger ?

Forced Induction Mopar

  1. flathead31coupe

    flathead31coupe Well-Known Member

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    its hard to see in the pics, but the rotors are twisted and have a slight bow to them, and go from low to high to low down the length of the rotor, was told its hard to set up to machine them
     
  2. MiradaMegaCab

    MiradaMegaCab Well-Known Member

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    • flathead31coupe

      flathead31coupe Well-Known Member

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      i have watched this a few times.... they set it up like this first before they dowel pin it permently.
       
    • Krooser

      Krooser Reform School Graduate

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      Who's blower case is it? GMC never made an 8-71 blower...all those rotors come from 8V71's and the cases are all aftermarket.

      Gary Dyer and his son are experts. I think Gary is retired. I sold those guys a half dozen 6-71 cases and rotors several years ago.

      Another good shop is Dean's Blowers in WA. Rick Dean did the gas conversion on my 6-71 Hemi blower.
       
      Last edited: Oct 12, 2020
    • flathead31coupe

      flathead31coupe Well-Known Member

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      dyer...8-71 gm
       
    • flathead31coupe

      flathead31coupe Well-Known Member

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      $_1 (2).jpg $_1 (9).jpg
       
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      • flathead31coupe

        flathead31coupe Well-Known Member

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        $_1 (8).jpg
         
      • MiradaMegaCab

        MiradaMegaCab Well-Known Member

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        That looks like a 671.
        What’s your blower case length?
        15” is 671
        16” is 871
         
      • flathead31coupe

        flathead31coupe Well-Known Member

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        you are right its 15''
         
      • flathead31coupe

        flathead31coupe Well-Known Member

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        so im going to try another shop in the morning,
         
      • TT5.9mag

        TT5.9mag Two atmospheres are better than one

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        The worst that could happen is you trash a good blower. The best that could happen is you loose all of the necessary clearance and turn it in to a big heat pump that makes no boost. They’re pretty simple machines, you could take it apart yourself and check everything. If not I suggest finding a different shop and getting a second opinion.
         
      • flathead31coupe

        flathead31coupe Well-Known Member

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        well i found a guy who knew just what to do...004 off the od should do it....he said that that od is 020 thick, good thing i did not try and do it.... lets hope it works when its done...
         
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