I am in the mindset right now of trying to model my engine and calculate various flow rates. What I'd like to do is make a calculator to show various rates of flow through the TB. I know it will be hard to determine the amount of opening anything other then full open/closed. I'm at WOT, and I'm also boosted... I have some info that I was reading that mentions Saint Venant equation to calculate the mass flow rate, using Ambient Air and Temp Upstream / PMan. Can anyone give some help on how I can do this? I'd like to be able to get velocity, mass flow, and whatever else I can take from it as well. Thanks!