Development in a Perfect Design Environment:
The cam profile, which influences the performance of a camshaft, is the most important element in a camshaft design. JUN uses advanced software created solely for finding optimum cam profiles. JUN engineers then test the computer-designed camshafts on their engine bench system, through the use of JUN's advanced combustion pressure measurement equipment. The engineers then analyze the state in the combustion chamber for every crankshaft angle, before repeating the testing process again with the different cam profiles that will be used on that engine.
Camshaft Profile is Optimized According to the Car
Not all aftermarket camshafts are the same! JUN changes the shape of their cam profiles based on the application, giving consideration to differences of valve motion (direct type, a locker arm type, strength of moving part, valve size, port and combustion room form etc). For example, the optimum computer-designed profile might be restricted by a wall in a head, the lifter hole size, the locker arm form, etc. Put simply, JUN camshafts are the best high-performance cams you can buy for your engine. With many hours of R&D put into each camshaft, you can rest assured that JUN cams will fit and function properly.
Superior Equipment and Quality Control:
In order to manufacture a highly precise camshaft, it can be said that the cam grinder is indispensable. JUN has used a precision CNC grinder from their early stages. This advanced piece of machinery can input the program data from their cam profile software and then accurately produce a quality camshaft based on that design. No camshaft leaves JUN's processing plant without undergoing their rigorous quality control testing and inspection. The result is a camshaft of unparalleled quality.
The Main Goal of JUN's Camshaft Development and Design:
JUN engineers concentrate on ways to increase the "filling efficiency" of each engine in order to obtain the best output. Part of this equation is how long the cam forces a valve to be open (duration). You cannot simply just increase how much the valve opens (lift) because the acceleration of the valve will become too large and it could loose contact with the cam. This jumping phenomenon will not only hurt the engine's output, but it can also cause engine failure. To avoid the "jumping phenomenon," it is necessary to increase the duration along with the lift. Engineers must make compromises in each high-lift camshaft to find the best design with regard to duration and valve slap.
JUN engineers brilliantly created a profile that used a large positive acceleration, but lengthened the amount of duration as the valve is closing to lower the negative acceleration -- keeping the valve in contact with the rest of the valve train while still having the valve open as much as possible for as long as possible. Design details like these, separate JUN from the competition.
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