so you are building to 200 - wow.
He means at 200mph how many lbs per in^2 do you think the inside of the box will see? How much pressure is achieved above the 1.2 free stream you previously stated using a divergent box (plenum)?
At what speed does the box begin to make a significant difference in HP?
Will you road race or straight line?
If you are going to road race and can get there - hats off. It frightens just thinking about it.
you got a lot of work ahead of you to run that.
What are you going to do with the car?
Can't wait to see your aero?
x-chr