maximum overdrive

Discussion in 'PSI Superchargers Tech Questions' started by ratchett13, Sep 4, 2012.

  1. ratchett13

    ratchett13 New Member

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    im running a kuhl standard 14-71 on my bbc what would the maximun rotor speed be on this kind of blower? 10,000 12,000 ???
    was thinking or putting a 40 pulley on the bottom and a 25 on the top turning the motor 7800-8000
     
    #1
    ratchett13, Sep 4, 2012
  2. alt 6153

    alt 6153 Member

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    That would be 60% over and that may be a little much. I run mine 53% over (40 bottom/ 26 top). But I don't run the motor over 7500 which = 11475 blower rpm. 60 over @ 7800 rpm is 12480 blower rpm. I was always told to keep it under 12000.
     
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    alt 6153, Sep 5, 2012
  3. SoDak

    SoDak Active Member

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    Hopefully someone with Kuhl experience can help you, maybe they are on this forum. Otherwise I would call Kuhl and ask them.
     
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    SoDak, Sep 5, 2012
  4. Mike Canter

    Mike Canter Top Dragster
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    You correct in that there is Max rpm you can spin the rotors and then you loose efficiency at an alarming rate. It is different for a high helix than a standard blower. All my data is at home and I can get it next week after I get home from ADRL race. Off the top of my head I believe high helix is around 14200, blower rpm and a standard is around 12000. Regardless of which type of blower it takes a lot more horsepower to spin them faster and also heats the air more which are both bad
     
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    Mike Canter, Sep 5, 2012

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