Camshafts
There is more to a camshaft then just the numbers on the cam card. Our camshaft test stand allows us to get a complete analysis of the lobe of the cam. We can find the lift of the lobe, centerlines & lobe separation, overlap of the camshaft, camshaft advance, opening & closing events of the camshaft and the lobe area to name a few. We then can use this information to help set up the valve springs to keep the valves under control. Our computer program will simulate to us if the valve is being tossed over the nose of the camshaft or if it is bouncing on the seat when it closes.
There is more to a camshaft then just the numbers on the cam card. Our camshaft test stand allows us to get a complete analysis of the lobe of the cam. We can find the lift of the lobe, centerlines & lobe separation, overlap of the camshaft, camshaft advance, opening & closing events of the camshaft and the lobe area to name a few. We then can use this information to help set up the valve springs to keep the valves under control. Our computer program will simulate to us if the valve is being tossed over the nose of the camshaft or if it is bouncing on the seat when it closes.
CLICK image to enlarge.
Example of a cam card we can print out for a camshaft. |
CLICK image to enlarge.
Example of a lift, velocity, & acceleration analysis of a lobe. |
Valve Springs
Our computerized valve spring tester allows us to test the pressures and different characteristics of a valve spring. We can test seat pressure, open pressure, spring rate, coil bind height, linearity of the valve spring, & the damping force of the valve spring. That then allows us to set up the installed heights on the cylinder heads for the correct valve spring pressures. We also believe that you want a valve spring to be set up as close to coil bind as safely possible to keep the harmonics out of the spring & keep the spring under control. We then can take all this information and overlay it on the camshaft profile to simulate what the valve spring may do on the engine. Another factor to consider is the weights of the valves, springs, retainers, & keepers. Titanium parts become very important when turning RPMs in an engine. The more weight you can get off the valve the more safely you can run higher RPMs.
Our computerized valve spring tester allows us to test the pressures and different characteristics of a valve spring. We can test seat pressure, open pressure, spring rate, coil bind height, linearity of the valve spring, & the damping force of the valve spring. That then allows us to set up the installed heights on the cylinder heads for the correct valve spring pressures. We also believe that you want a valve spring to be set up as close to coil bind as safely possible to keep the harmonics out of the spring & keep the spring under control. We then can take all this information and overlay it on the camshaft profile to simulate what the valve spring may do on the engine. Another factor to consider is the weights of the valves, springs, retainers, & keepers. Titanium parts become very important when turning RPMs in an engine. The more weight you can get off the valve the more safely you can run higher RPMs.
CLICK on image to enlarge.
Example of the data recorded in a spring test. |
CLICK on image to enlarge.
Example of how much force is on the pushrod and what happens when valve toss occurs. |
Valve Spring Tester
|