440 871 supercharger ?

Forced Induction Mopar

  1. flathead31coupe

    flathead31coupe Well-Known Member

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    thats what iam thinking,,,not sure how it worked before with the thick gasket i was using....even though their inst says you can just use a sealant instead of a gasket worries me a little
     
  2. pishta

    pishta I know I'm right....

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    Sealant would be a metal on metal "no crush, no foreign stress riser" from an out of spec or thick gasket.
     
  3. flathead31coupe

    flathead31coupe Well-Known Member

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    update so after getting the recomended 0.15 blower base gasket today, installed it,,,same thing it still hits when torq down.....calling dyer in the morning....iam at a loss
     
  4. flathead31coupe

    flathead31coupe Well-Known Member

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    was told i need at least 0.08 clearence, 0.09 is better i have 0.04 did the alum grow? he said i need to have the rotors turned to the clearence i need...i ran this blower for over a year.. pic shows cant get 0.06 in there...thoughts? WP_20201008_10_48_04_Pro.jpg WP_20201008_10_48_33_Pro.jpg
     
  5. jimjimjimmy

    jimjimjimmy lobsterman FABO Gold Member

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    the only thing i can think would be if something got in there and warped or bent the rotors a few thousand , did you try measuring in 3 or 4 different spots around the rotation . i know it sounds stupid but its all i can think of off hand .
     
  6. flathead31coupe

    flathead31coupe Well-Known Member

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    it's 0.04 on all rotors...
     
  7. mopar head

    mopar head Well-Known Member

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    Looks like scrape marks on rotors in pics?
     
  8. flathead31coupe

    flathead31coupe Well-Known Member

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    that was me smoothing of spots I thought look rough
     
  9. mopar head

    mopar head Well-Known Member

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    It looks like their is a little raised spot on the rotor edge that has also contacted the case.
    The darker line in section you touched up. I`d say somehow someway a tiny piece of debri got in there and locked it up. Good luck, I`d love to experience a blower car someday. Dream of mine:)
     
  10. flathead31coupe

    flathead31coupe Well-Known Member

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    the guy at the blower place said to turn 0.05 off of the rotors, that would be most of the raised strip alum and it would be fine...cant understand how the rotors grew lol
     
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    • mopar head

      mopar head Well-Known Member

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      Be nice to find someone, machinist, with a surface plate to see if the case warped?
       
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      • flathead31coupe

        flathead31coupe Well-Known Member

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        it would be nice...remember it ran a month ago no issues, removed just the blower not the intake....and now all of this.... being 0.04 around all rotors and it turns free not bolted up ...and to nee 0.09 to be correct , a 0.05 difference floors me...how can this be?
         
      • mopar head

        mopar head Well-Known Member

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        Incredible growing chinese aluminum?
        Got me...
         
      • MiradaMegaCab

        MiradaMegaCab Well-Known Member

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        Are the dowel pins present between the case and bearing plates?
        Is the manifold warped?
        Lay the blower on the manifold without a base gasket, does the blower rock around, or sit nicely?
         
      • flathead31coupe

        flathead31coupe Well-Known Member

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        yes and its flat no rock around...i was told to do it right a shop could relocate the dowels from 5/16 to 3/8 and get the 0.05 thats needed
         
      • flathead31coupe

        flathead31coupe Well-Known Member

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        i never took the manifold off just the blower....same running engine just in a different car...
         
      • flathead31coupe

        flathead31coupe Well-Known Member

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        looks like i will be taking it apart and having the od machined down to the 0.05 i need,,,
         
      • flathead31coupe

        flathead31coupe Well-Known Member

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        crazy, i live in the racing capitol of the world, but yet to find a machine shop that can take 0.05 of of my rotors...seems crazy to me....
         
      • mopar head

        mopar head Well-Known Member

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        5 thousands = .005 you could carefully achieve that with sandcloth.
        Or maybe your local machinist would be more comfortable boring out the case?
         
      • flathead31coupe

        flathead31coupe Well-Known Member

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        i was thinking the same thing, maybe a good file...
         
      • TT5.9mag

        TT5.9mag Two atmospheres are better than one

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        Before you machine (or sand) anything check the bearings. It seems entirely logical to me you have a bearing that could have some slop in it causing your problem. I would hate to see you open up the case or polish down the rotors just to end up with a boat anchor that has bad bearings.
         
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        • MiradaMegaCab

          MiradaMegaCab Well-Known Member

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        • flathead31coupe

          flathead31coupe Well-Known Member

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          if i did take the od off the rotor, whats the worst that can happen...would it make them out of balance or what? WP_20201012_20_03_28_Pro.jpg WP_20201012_20_04_11_Pro.jpg that 3/8 wide strip is what they call the od its about .005 thick and was told by the blower guys to have it machined off.. would not hurt it at all.
           
        • flathead31coupe

          flathead31coupe Well-Known Member

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          they were looked at and said to be good and tight.
           
        • flathead31coupe

          flathead31coupe Well-Known Member

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          thanks,,,
           
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