What is a split camshaft?
In engine designs where the camshaft is inserted through the camshaft bearings, the diameter of the bearings become a limitation on the design of the cam lobes. AGAP has developed a patented principle which makes it possible to use significantly larger cam lobes than what otherwise would be possible.
What is a good cam duration?
Cams with durations in the 195 to 210 degree range (measured at . 050˝ cam lift) are usually considered best for stock unmodified engines and those with computerized engine controls. A cam with a duration of 240 degrees of higher will typically produce the most power from 3,500 to 7,000 rpm.
What does lobe separation do for a cam?
The primary function of narrow lobe separation is to impel urgent acceleration off the turns when the throttle is opened. A wider LSA, on the other hand, reduces valve overlap, offering better idle and cruising qualities.
What causes cam break?
A broken camshaft is usually caused by a connecting rod or other rotating part coming loose and striking it. Sometimes the cam will break after a short time of use because of a crack or fracture in the cam due to rough handling during shipping or improper handling prior to installation.
What does cam duration do?
DURATION: Duration is how long the cam holds the valves open. It’s expressed in degrees of crankshaft rotation (remember, the cam rotates at half the speed of the crank). A 280-degree-duration cam holds the valves open longer than a 260-degree-duration cam.
How is cam lobe separation calculated?
Cam Lobe Separation Lobe separation can be measured using a dial indicator and a degree wheel, but is usually calculated by dividing the sum of the intake centerline and the exhaust centerline by two.
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.
Can a camshaft damage the engine?
A Cracked Camshaft Rough handling during shipping or installation that causes unseen damage, like a crack. Unseen damage can escalate once the engine is assembled and begins to run.
What does duration of camshaft mean?
Camshaft duration is the period of time, measured in degrees of crankshaft rotation, that a valve is open. “Advertised duration” measures duration from the point where the cam manufacturer believes the lobe starts raising the lifter. This is called the checking height and it varies from manufacturer to manufacturer.
What does cam duration mean?
Cam Duration is the number of crank degrees between when a camshaft opens the valve and when it allows the valve to close. Under normal circumstances bigger duration would be better. However, when you throw the 10.8lb spring in the mix, everything changes.
What is the duration of a cam?
The length of the movie Cam is about 1 hour 34 minutes
What is a camshaft lift?
The camshaft “lift” is the resultant net rise of the valve from its seat. The farther the valve rises from its seat the more airflow can be provided, which is generally more beneficial. Greater lift has some limitations.