carb sizeing
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carb sizeing

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    Senior Member APOLLO's Avatar
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    Default carb sizeing

    What is the formula to calculate carb size for a blower motor? I have seen it before but can not remember where.
    Thanks in advance. Troy

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    steelcomp was here
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    Quote Originally Posted by APOLLO View Post
    What is the formula to calculate carb size for a blower motor? I have seen it before but can not remember where.
    Thanks in advance. Troy
    On blower engines; one of the fewer places where bigger, is better (within reason of course).
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    gn7
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    {(CID X RPM)/3456} X {(boost/14.7)+1} This is a small as you what to go.



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    Quote Originally Posted by gn7 View Post
    {(CID X RPM)/3456} X {(boost/14.7)+1} This is a small as you what to go.
    Sounds about right for a roots style with the carbs on top, which would be my guess as to what is being asked. If its a blow through arrangement its a different story.
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    gn7
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    Quote Originally Posted by APOLLO View Post
    What is the formula to calculate carb size for a blower motor? I have seen it before but can not remember where.
    Thanks in advance. Troy
    You are correct, but I like to think that most people don't refer to turbos and centrif's as blowers. But then, maybe its just me



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    Senior Member APOLLO's Avatar
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    Quote Originally Posted by gn7 View Post
    {(CID X RPM)/3456} X {(boost/14.7)+1} This is a small as you what to go.

    This is what I was looking for. Thanks a lot GN (ROOTS)

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    Quote Originally Posted by APOLLO View Post
    This is what I was looking for. Thanks a lot GN (ROOTS)
    Here's another one with a chart if helps. http://www.rbssuperchargers.com/The_...etion_5480.cfm
    Quote Originally Posted by One More Year View Post
    The only blab's I will even be a part of is just when it is me they are talking about. Aaaah yes I can see a few good looking shiny tall deck motors on the beach, with barely enough fuel to get back to the launch saying, "Holy crap how fast you think that Daytona was going man? That's like the 20th time he's gone by today?"

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    gn7
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    Thanks, its easier and it works out to almost exactly the same. The boost correction in you link works out exactly to the secon half of the equation I posted. Less math though.



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