blower rotors

Discussion in 'PSI Superchargers Tech Questions' started by lonnie, Nov 28, 2006.

  1. lonnie

    lonnie New Member

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    can you take std blower rotors and install them into a retro style case with front discarge,will it work or do i need different rotors too,thanks in advance lonnie
     
    #1
    lonnie, Nov 28, 2006
  2. Mike Canter

    Mike Canter Top Dragster
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    A standard rotor has a 60* twist to it and a High Helix has a 120* twist to it. The High Helix because of the extra twist pushes the air out more towards the front of the blower (at a higher angle) so the pie cutout came into play and then the retro with the cut out towards the bearing support to let more air out. Standard blowers push more air straight down and need the square openings in the bottom of the case. If you put standard 60* rotors in the high helix case the air wants to go more straight down and you don't have that opening in your case. The answer is no it would not work.
     
    #2
    Mike Canter, Nov 29, 2006
  3. lonnie

    lonnie New Member

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    thank you mr mike,
     
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    lonnie, Nov 29, 2006
  4. blown375

    blown375 New Member

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    rotors

    Lonnie ,not to dispute Mike Canter; he is always helpfull to everyone and very knowledgable but... If you go to RBS s' website and do a search for "retro" he sells many blowers that are retro cases with 60 degree rotors.
    Mike is correct that the 120* rotor pushes the air more toward the front of the the case but so does the 60* rotor , just not as much. Iwould say check with littlefield or The blowershop or BDS or any other company that builds a 60* retro blower . If anything what you are doing seams as if it would work better than a full opening bottom case. It seems to me that a full opening bottom would only work better with a straight lobe rotor that pushes the air straight down. No offense Mike ,Just my opinion !
     
    #4
    blown375, Nov 29, 2006
  5. KDavidson

    KDavidson Member

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    JMO,

    We run a Littlefield 60* retro 6-71 from JR @ RBS on a BBC and absolutely love it. It makes the fuel distribution,, hat nozzles only, on a BBC, VERY equal. All cylinders burning very close to the same. Engine is happy, 22# boost @ 32% over on a 477 BBC.

    Keith
     
    #5
    KDavidson, Nov 29, 2006
  6. john348

    john348 Top Alcohol

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    I am not sure about this but
    someone correct me if i am wrong:

    look at the fuel cars, dont they have to run 60 degree rotors
    looks to me that they all run the delta opening
    why else would the blower be so far back it is ready to fall off the back
     
    #6
    john348, Nov 29, 2006
  7. Mike Canter

    Mike Canter Top Dragster
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    The fuel blowers I have seen all have the straight openings. There are probably many I haven't seen. The 60* twist (helix) still pushed the air forward so they set back to make it come out in the middle of the manifold. Some of the Top Fuel manifolds that I have seen actually look like a short carb manifold with a center plenum and runners.
     
    #7
    Mike Canter, Nov 29, 2006
  8. lonnie

    lonnie New Member

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    thank you to all for your replys i have a good idea of what i need
     
    #8
    lonnie, Nov 29, 2006

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