Where should a Velocity Stacks draw air from?

[gtemkin]

From what I read of velocity stack design, and for the moment ignoring the pulse wave tuning that can be a benefit, the basic concept is to provide a shape of entry that allows smooth unencumbered flow of incoming air.

I’ve seen many pictures of velocity stacks sticking out the sides of a bonnet on race cars. That seems entirely counter to the concept of non-turbulent, smooth flow. Shouldn’t all stacks draw from relatively still air, such as from an air box, with plenty of empty volume around the stack opening?

[stevieturbo]

yes