How do you measure a turbo size?

Posted by AWD1gTalon, Mar 18, 2004

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  1. AWD1gTalon

    AWD1gTalon Probationary Member

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    Joined Feb 25, 2004
    Danbury, Connecticut
    I'm interested to know how a turbo size is measured. When people talk about trim size, what is that standing for or what wheel is measured. An example, a 50 trim. where does that number come from, which wheel is measured and would it be exactly 50mm? And how does each wheel affect flow and performance.
    Thanks.
     

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  2. Iceman

    Iceman Proven Member

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    Joined Mar 18, 2004
    Minnesota, Minnesota
    50trim means the wheel it uses.
     
  3. L2RTSiAWD

    L2RTSiAWD Moderator

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    Joined Apr 8, 2002
    Chandler, Arizona
    More specifically, the Compressor wheel.
     
  4. AWD1gTalon

    AWD1gTalon Probationary Member

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    Joined Feb 25, 2004
    Danbury, Connecticut
    so by measuring the compressor wheel i'll get say 50mm is there a taper on the wheel or anything where it would affect a person measuring it or is 50 all the way down. thanks, this is just something i've been wondering.
     
  5. kpt4321

    kpt4321 Proven Member

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    Joined Jul 30, 2002
    Trim is a ratio of the exducer diamter and the inducer diameter. Trim is equal to the square of the inducer diameter divided by the exducer diameter.
     
  6. AWD1gTalon

    AWD1gTalon Probationary Member

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    Joined Feb 25, 2004
    Danbury, Connecticut
    thanks, i was wondering where the numbers came from and how they were determined.
     

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