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ITB sizing: Port diameter vs. Throttle Diameter

Discussion in 'General Tech and Maintenance' started by K2e2vin, Aug 17, 2006.

  1. K2e2vin

    K2e2vin Senior Member

    Likes Received:
    Jan 2, 2003
    Raleigh, NC
    I know that people say for x displacement you want xmm diameter ITBs; going too large will move the powerband too far up. Well, lets say that the runners being used are the same, but you change the ITB diameter from 48mm to 52mm, would the engine be just as powerful or would the throttle diameter make that much of a difference itself?
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