Can you calculate the Effective Area of your TB?

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06-04-2005, 10:22 AM

Phil99vette

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Can you calculate the Effective Area of your TB?

Looking and Looking at how simple the progamming works in the LS1, I imagine you can calculate the effective area of your throttle body. Anyone want to help find a calculation?
Phil

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06-04-2005, 05:37 PM

P Mack

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Do you mean area as a function of throttle position? Did you switch to a 90mm throttle body or something?

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06-04-2005, 06:38 PM

Scalpel

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Could you just pipette a volume of liquid in the TB (which blade closed) to determine the total volume. Then solve for area.

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06-04-2005, 10:44 PM

P Mack

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It should be something like this:

Area = Pi * (D/2)^2 * (1-cos(.9*TPS%))

Where D is the diameter of the throttle blade, TPS% is throttle position in percent, and cosine is done in degrees.

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06-04-2005, 11:27 PM

Dixit

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Does this table only need to be modifed when putting a larger TB and/or intake in? Like for me who has a stock TB and stock LS6 intake, but a 228/232 .600" lift 112lsa cam is it necessary?

Dixit