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danht 
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Joined: 24 January 2010 Location: United States Status: Offline Points: 14 |
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 Topic: CFMPosted: 06 April 2010 at 1:47pm |
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does any one know of a formula for figuring Cubic feet per minute using diamater of a venturi or throttle valve plate?
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Dr.Fiero
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Joined: 12 February 2007 Location: Canada Status: Offline Points: 1726 |
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Posted: 07 April 2010 at 7:08am |
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http://www.efunda.com/formulae/fluids/venturi_flowmeter.cfm
That's through a venturi (which gets weird). You're almost better off to just figure out the difference in flow if you want to hog out a throttle body (which has almost no venturi effect when you're looking at EFI vs. Carb). |
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danht
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Joined: 24 January 2010 Location: United States Status: Offline Points: 14 |
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Posted: 07 April 2010 at 1:34pm |
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I guess that was what I was thinking. that the throttle plate is the only unchangable part, where as the body can be massaged to a larger diamater. I have a spare intake for the duke and wanted to play with my dremmel. I havn't taken a mic to one but understand that the later duke TBI's had a larger diamater. (since the Holley TBI's for the dukes seem to be gold) every little bit. |
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Dr.Fiero
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Joined: 12 February 2007 Location: Canada Status: Offline Points: 1726 |
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Posted: 07 April 2010 at 1:38pm |
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WTF - go nuts on the thing, and turn it into a dry throttle body, then rig up an MPFI setup (which is what all the later setups are - like what's on the 2.2L in my Cavalier).
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