What does more lobe separation do?
“On a naturally aspirated engine, the lobe separation angle has an effect on whether the engine reaches peak torque a little earlier or later in the rpm range. Typically, narrower lobe separation develops peak torque at lower rpm and widening the separation tends to build peak torque higher in the rpm range.
What is the difference between 114 LSA and 112 LSA?
A wider LSA figure (i.e. 114) moves the lobe centerlines further apart and will smooth your idle due to the decrease in overlap that it creates. The lower the figure (i.e. 112) moves the centerlines closer and will increase bottom end power, but your idle will suffer along with it.
What does intake centerline mean?
The intake valve reaches its maximum lift at some defined point (usually about 106 degrees) after top dead center. This is called the intake centerline, which refers to where the cam has been installed in the engine in relation to the crankshaft. This is where the engine can really build some power.
What camshaft means?
A camshaft is a rod in an engine that works to change circular motion into motion up and down or from side to side. A camshaft determines how and when the engine valves open. Conventional fuel injection in a diesel engine involves a pump driven via a camshaft from the engine.
How does LSA affect torque?
Narrower LSA: Moves torque to lower rpm. Increases maximum torque. Narrow powerband. Increase chance of engine knock.
What makes a cam chop?
Overlap is the sole reason why a cam will “chop” or not. Sure, LSA can control overlap but its the mixture of duration and LSA that fully controls the amount of chop a cam has.
What is LSA cam?
What Is Lobe-Separation Angle? LSA is the distance from the centerline of the intake lobe to the centerline of exhaust lobe. It is the average centerline between both lobes and expressed in degrees ranging from 95 on the extremely narrow/tight side to upward of 120 on the wide end.
What is tappet lift?
Flat Tappet (lifters) are in most V8’s and literally have what looks like a flat bottom where the cam lobe contacts the tappet (lifter). Lifters are not actually flat on the contact surface. To build big horsepower you need to have a cam with a lot of lift to open those valves wide.
What is a tappet in an engine?
A tappet is most commonly a component in an internal combustion engine which converts the rotating motion of the camshaft into linear motion of the valves, either directly or indirectly. An earlier use of the term was for part of the valve gear in beam engines beginning in 1715.
What does a performance camshaft do?
A performance camshaft… is just a camshaft whose lobe profile is tailored to utilize more of an engine’s potential. usually a higher lift on the lobe, which increases in length of the valve stroke, which allows for more air to enter through the inlet valves, increasing the power potential of the engine.