What are camshafts timed to?
The camshaft is connected via the timing chain and sprockets at a 1:2 ratio to the crankshaft and therefore revolves once for every two turns of the crank. Its purpose is to operate the intake and exhaust valves in the correct timing with the piston as it sequences thru the four strokes.
Does a camshaft increase horsepower?
Consider installing a performance camshaft. Performance cams increase the duration and timing of the valve openings during the engine stroke, increasing horsepower and making your car accelerate more quickly.
What happens when you advance the camshaft position?
Effects of Cam Advance. Advancing a camshaft from its original position causes all of these valve events to happen earlier in the cycle. A camshaft advance of 4 degrees will cause each opening and closing event to occur four degrees sooner than before, changing the ability of the cylinder to build pressure.
How does the camshaft synchronize with the crankshaft?
This is a process that synchronizes the camshaft with the crankshaft. For best engine performance, builders use a degree wheel to dial in this measurement. Most manufacturers will list the exact specifications for each cam on the cam card. The length of time the valve is held off the valve seat from the cam lobe.
How does cam timing and Cam separation affect the engine?
The following tables illustrate how variations in lobe separation angle and cam timing will effect the behavior of the engine in which the camshaft is installed.
Can a camshaft lobe be changed after grounding?
Lobe center angle is fixed and cannot be changed after the cam is ground. The lobe centerline can be altered by advancing or retarding the cam. When you do this you are effectively moving the intake lobe centerline closer to or farther from TDC. This illustration tells you everything you need to know about camshaft operation.