Andrews cam programs use an interactive, intuitive graphical interface which makes it easy for beginning or experienced users to rapidly design quality cam lobes. Worlds top manufacturer of performance camshafts, lifters, valve springs, rocker arms and related valve train parts for all race and street performance engines. Dynomation6 lobe profile library motion software, inc. Custom camshaft design support andrews products has the unique capability to design and manufacture camshafts from 2 inches in length to 44 inches. Computer program to measure cam profiles camshaft profiles by hand, or analyze graph and. With the adjustable 2 stage smoothing function its also easy to get low jerk values without compromising the lift curve. Camshaft math to design competitive performance engines. Velocity, acceleration, and jerk are the first 3 derivative domains of the lobe shape and are the domains that most of the real design work is accomplished in. The cam profile or cam lobe is just the geometrical shape that is required to. It includes lobe lift, net valve lift, timing points at the advertised duration, duration at 0. A camshaft includes a drive, bearing journals, cam lobes and possibly. Camshaft technology andrews products is a one stop shop for camshaft design, software and related technical training to support your complete development process from basic designs to finished parts. Cam design and analysis programs camshaft calculations.
Our camshaft design programs allow end users to examine multiple designs in a short period of time, minutes. Development of an interactive camshaft design tool diva portal. Andrews products can provide finished cam designs and quick turn around. Users do this with an adjustable camshaft diagram, in which they select duration, lobe. Deciding which camshaft is the right one for you vehicle chevy high performance magazine.
In this study, the effects of modifying the restrictor design, intake runner length, intake camshaft profile, exhaust geometry, and silencer design were measured using a transient dynamometer. Special software can also be used that will control the amount of curvature when necessary on some designs. Camshaft lobes are designed by starting with the lift curve, and working backwards to. These cam profiles can be designed with or without a negative radius of curvature inverted flank. For cam design, not only is the lift curve important, but also several. Professional cam and perfect cam software to design the. Were not discussing the finer points of lobe ramp angles with this story, but simply explaining some of the basic terms and general theories of camshaft design and operation.
Zoomed in on the top of the accelleration curve, shows the difference in 1 and 0. For this reason, we need to learn a bit more about lift curves before we can discuss how lobes are designed. Cam design service also includes reverse engineering where original calculations are no longer available. Theres lift and duration, overlap and lobe centers, lobe separation angles and so on, and all of them have numbers attached. Finding the right camshaft chevy high performance magazine. Andrews products is a one stop shop for camshaft design, software and. Camshaft lobe design tilden technologies camshaft design. Camshaft art and science you get out what you put in engine.
Camshaft lobe design camshaft lobes are designed by starting with the lift curve, and working backwards to determine the lobe shape that will produce the lift curve. Our opticam software uses this design method with a choice of either cubic. The science behind camshaft design circle track magazine. A slight difference in cam height from end to end slight slope of the camshaft on the stand is not critical for most measurements, because the encoder is. Custom camshaft design support camshaft parameters.
The science behind camshaft design is as advanced as anything in a race car, so most of usincluding experienced engine buildersdepend on the manufacturer to help spec the right cam for a. In fact the software allows, to design valve lift law, to calculate cam profile for the main type of valve train system, to verify the valve train system with the spring load calculus and also to analyze the geometry of combustion chamber. Cat cams has a large database of cam designs available, ready for grinding to. Modern lobe design is no longer primarily done in the displacement domain or physical shape of the lobe, but in the derivatives of that shape. Pdf camshaft design for an inletrestricted fsae engine. Pressing the import lobe profile button in the camshaft category opens the. Roller tappet profiles are designed for a specific base circle diameter of the lobe and roller wheel diameter. Understanding camshafts camshaft basics camshaft design. The camshaft timing card included with your cam provides the essential specifications for installing your cam correctly. Call today for your new billet cam, billet turbo or custom work. Cam lobes and any related gear parts are then subjected to a complete computerized inspection for assurance that all designated parameters match target specifications. Custom camshaft design engineering andrews products. In an overhead cam ohc design, we design the valve action in the software and then create the cam lobe shape by a mathematical function.
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