[Diy_efi] Throttle body sizes

[Brian Dessent]

Joe Lutz wrote:
> 
> I don't mean to change the subject, but this brings up a question I have.
> At what depression is the standard for rating the flow rate (cfm) of
> throttle bodies and carbs?  There must be a standard because the flow
> obviously depends on the pressure differential so these things would have to
> be flowed at the same pressure for fair comparison.

Could be wrong, but I think the common standard is 25" WC of pressure. 
That equals 0.903psi or 6.23kPa if my units program can be trusted.

Brian

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