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Originally Posted by james4513
Boosted2.0 - Tell us more - Tell us what it does and how it works. Impressive!
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In its most simplified sense its a giant air pump with a computerized metering device that monitors airflow. The one we built can suck or flow in excess of 1000 CFM (Cubic feet of air per minute). To give you an idea, a 3" tube flows a bit over 700 CFM at 28" of vacuum (standard test pressure). So I can test CAIs, exhaust components, manifolds, throttle bodies, etc.
The way it works is you set the pressure you want to test at and measure flow through a component (I have a computer controlled pressure regulator). Then you modify that component (port it, or replace it with one of another hopefully superior design) and you test it under the same pressure, which will let you know how much the flow has increased.
You also have to pay attention to air speed as well as flow, which means using the flowbench in conjunction with a device called a pitot tube that is inserted into various areas of the item you are flow testing to test flow in a specific area. Since air is compressible it doesn't flow around bends evenly, and this data is very important for mapping where the bulk of the air is going through a component so you can pay attention to that area, as well as for the reason that if you kill airspeed off too much on at least the inlet to a head, you can wind up with poor fuel mixture with the air in the cylidner.