![]() It then measures the amount and velocity (or pressure) of the air that’s being moved through the system, and gives the user the data. How A Flowbench WorksĪ flowbench is not that complicated in that all it does it push or pull air through an orifice, with that orifice most commonly being a cylinder head. This story will show how to use it, and then how to interpret the data using the help of Curtis Boggs from Race Flow Development (RFD) in Virginia Beach, VA. Power Automedia recently obtained a SuperFlow SF-750 flowbench for the shop and is already putting it to good use on projects. The numbers that read out are already corrected.” “Also, with the computer you get additional features, such as no more lookup tables. ![]() “Believe it or not, it’s more affordable to produce the FlowCom than use a manometer,” says Giles. “That’s especially true on smaller benches where the scale isn’t as large,” adds Giles.Īnother benefit of a computerized measurement system is cost. The main problem with a manometer is that the readings can change depending on the viewing angle of the meniscus. From a technical standpoint, the FlowCom is much more accurate.” “They like using manometers because they can see it. “Some guys don’t trust computers,” says Giles. Some veteran engine builders may prefer the old method of watching the water levels, but there are numerous advantages to the new system. One of the key features for SuperFlow benches is the FlowCom measurement system that does away with manual reading of a manometer. Again, check out the video to learn more about each flowbench. SuperFlow benches range from flowing up 160 cfm at 10 inches of water to 1,100 cfm at 25 inches. “You don’t need the highest capacity bench to flow a motorcycle head.” “The main reason for the different flowbench sizes is to match the flow requirement of different heads,” sums up Mike Giles, former marketing manager at SuperFlow. SuperFlow offers a variety of flowbenches to fit the needs of race shops, garages and parts manufacturers. Let’s say you performed a home porting job on your heads (yet another book) and want to see how much, if any, you improved flow. The flowbench is a tool that lets you check what that flow is. The CFM rating should be tailored to the engine’s desired flow rate and power level, which could fill yet another book. ![]() New cylinder heads rated by several measurements but one of the most important to consider is cubic feet per minute (CFM) of air that can flow in both the intake and exhaust ports. Rather, let’s talk about how to measure airflow in and out of a combustion chamber using a flowbench. ![]() We don’t have room here to illustrate how to maximize a cylinder head’s effectiveness by port design and shaping-that information could easily fill several hard-bound books. That’s why so much thought and design must go into a cylinder head for each application. The most restrictive, and therefore the most critical factors, are the cylinder head intake and exhaust ports. There are thousands of factors that effect not only how much air, but also the quality of that air, that gets into an engine. In theory it’s pretty simple but in reality it’s more complicated. The more of both it can move, and the faster it can do it, the more power the engine makes. An engine makes power by moving air and fuel into and out of it. ![]()
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