Flow Bench Services

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Flow Bench Services
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Mason's Racing utilizes the JKM Flow 400 flow bench. The JKM Flow 400 measures the depression and the flow, and then adjusts the displayed flow to what it would be at the standard depression. You select the standard depression by the range knob on the front panel. The method the JKM Flow 400 uses to calculate this adjustment is a well established principle of fluid dynamics, and is recommended by the largest flow bench manufacturers.

How It Works
The JKM Flow 400 uses an averaging velocity tube to measure flow. The velocity tube and the orifice (commonly used in flow benches) are both members of a broader classification of flow measuring devices called differential producers. With both of these, the flowing air produces a pressure drop that is proportional to the square of the flow. The combination of this nonlinear response and high pressure drops gives the orifice a limited range. This is why flow benches need several orifices of different sizes.

The JKM Flow 400's averaging velocity tube can measure a broader range than an orifice because it's a low constriction design has a low pressure drop. Its range is further extended because it does not control the depression. A valve opening that over-ranges the orifice on a flow bench, does not over-range the JKM Flow 400 because the depression drops resulting in less flow. The JKM Flow 400 senses this depression drop and corrects the flow figure to what it would be if the depression were at the standard value.

All heads flowed and re-worked will have a printed report showing flow values at all lift points. All heads flowed and re-worked will have a printed report using Audie Flow Pro Software.

Call for further details.


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