Airflow technology flow bench testing12/23/2023 ![]() ![]() There will be no air movement when the most significant air is flowing. The ultimate goal when it comes to Flow Bench Testing, is to maximize the effectiveness of that particular location. The most critical component of the induction system is the valve and seat configuration, which governs the amount of air that enters the cylinder. Properly built ports can move large amounts of air. Then the runner must be tuned harmonically on the system and on the bench to achieve this. A port must have a certain amount of airflow, but it must also have a certain average velocity and peak velocity. The flow bench tells you this, and these are the three rules. To make horsepower, there are three laws: air speed, air speed, and airspeed. The CFM value is the last item to look at when flow testing a cylinder head. How far away from the cylinder wall do the valve heads extend? What’s the valve diameter to bore diameter ratio, for example? What is the airflow to valve size ratio? What is the port’s diameter, taper, and radius on the short side? When it comes to engine performance, the answers to these questions aren’t as straightforward as comparing flow numbers, but they are the ones that matter. More essential than airflow is a slew of other issues. It doesn’t matter what the peak airflow of a ported head is, as if it doesn’t consider factors such as the engine’s size and rpm range as well as the location of the valves. On the other hand, engine builders will be unable to use the results of the tests if they do not also have access to the relevant variables.Ī slew of variables complicates cylinder heads’ performance. To achieve flow numbers, make everything large and mount it on a large bore. Many assume they may increase their power by purchasing a high CFM flow rate cylinder head. Using the Hard DataĬylinder heads may be near in volume, yet their flow curves can differ dramatically. It takes years of practice to become proficient in these techniques. When designing the correct port/manifold design for an engine’s combination, the intricacy of arithmetic, aerodynamics, thermodynamics, and physics come into play. The RPM range, acceleration, and power of ten different ports with the same flow statistics can vary drastically. In a highly complex system, flow numbers are simply one of many variables that can be used to study the port’s features. They do not, however, ensure that you will get additional power.Īccording to industry experts, flow figures alone are meaningless and cannot be utilized to assess a cylinder head’s power potential. Data on airflow provides an understanding of how much power a vehicle can generate. ![]() Just not in the sense that most people think of it. ![]() These numbers are significant and have a purpose. This nuance is frequently lost throughout the translating process. However, this is incorrect and will not help you on race day.įlow bench testing and what you need to know about your engine’s cylinder head and induction system are examined here.Ĭylinder head designers and head porters ignore flow numbers, but this does not indicate that flow figures are unnecessary. You may think that flow bench testing would be simple. ![]() Cubic feet per minute (cfm) statistics have become the industry’s exclusive focus since they are so easy to manipulate, neglecting other data concerning the cylinder head’s performance. Flow bench testing appears simple on the surface, but it is not. ![]()
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