How to find the intake lobe centerline in a camshaft?
To find the intake lobe centerline, divide the intake duration by two and subtract the indicated intake opening point as shown in our example with the Comp XE274 example. Intake Centerline = (duration ÷ 2) – IO Intake Centerline = (274 ÷ 2) – 31 = 106 degrees Sometimes you find a very mild or stock cam where the IO occurs after TDC (ATDC).
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.
Where does the camshaft position sensor send the information?
The camshaft position sensor gathers information about the vehicle’s camshaft speed and sends it to the vehicle’s engine control module (ECM).
How does lobe center angle affect engine performance?
In terms of engine performance, the lobe center angle is significant. A larger angle yields less valve overlap (the period when both valves are open at the same time). This permits the cylinder to begin building pressure sooner and that boosts low-speed torque.
Where can I find a camshaft lobe catalog?
With other manufacturers, you have to search through cam lobe master catalogs and their assorted camshaft lobe types hoping to find a cam lobe that is properly designed for your application and is available in the duration that you want. Now you can say goodbye to lobe hunting.
What are the camshaft lobes on a Chevy LS?
Below is a list of the hydraulic camshaft lobes that Cam Motion offers for Chevy LS and Gen 5 LT series engines. We make durations at .050” that range from 193 degrees to 282 degrees in one degree increments.
What is the length of a cam lobe?
We make durations at .050” that range from 193 degrees to 282 degrees in one degree increments. These lobes are available in wide range of lifts in .005” lobe lift increments.
The camshaft position sensor gathers information about the vehicle’s camshaft speed and sends it to the vehicle’s engine control module (ECM).
To find the intake lobe centerline, divide the intake duration by two and subtract the indicated intake opening point as shown in our example with the Comp XE274 example. Intake Centerline = (duration ÷ 2) – IO Intake Centerline = (274 ÷ 2) – 31 = 106 degrees Sometimes you find a very mild or stock cam where the IO occurs after TDC (ATDC).
What is the lobe separation angle on a camshaft?
Lobe Separation Angle (LSA) or Lobe Centerline Angle (LCA)- is the only camshaft specification rated in cam degrees, not crankshaft degrees. Lobe separation is the angle in camshaft degrees between the maximum lift points of the intake and exhaust valves.
How much valve lift does a lobe lift cam give?
For example, a 0.310” lobe lift cam yields 0.496” of valve lift when using a 1.6 ratio rocker arm. A.To maximize valve clearance the piston crown can be modified. Hence, a concession must be made between the amount of valve lift that can be selected without being detrimental to piston design.
What happens when one lobe of the camshaft wears out?
All cams wear eventually, and most never notice it aside from the fact that the engine doesn’t feel quite as perky as it used to. But when a single lobe wears out before the rest because of bad oil, excessive spring pressure or bad valvetrain parts, you could easily end up with a bucking, popping, backfiring mess of an engine.