How is cam degree calculated?
Table of Contents
How is cam degree calculated?
D.C. To determine the amount the camshaft is advanced in crankshaft degrees, simply subtract the difference between the intake and exhaust Top Timing and divide by two. In this case 37° – 29° = 8° ÷ 2 = 4 crankshaft degrees of advance.
How do you calculate cam overlap?
There are a couple different ways to calculate the overlap of the cam. 1) The easiest way is to add the intake opening times to the exhaust closing time. Seat to seat times (advertised duration) must be used. . 050″ durations or timings will not give the correct overlap.
How is total cam lift calculated?
Simply measuring the diameter of the base circle, and subtracting that from the largest diameter of the cam, the lobe lift, will calculate the lift of the cam.
How much should a camshaft overlap?
To maintain sufficient idle and vacuum qualities, the cam tech recommends the cam be ground on, say, 112-degree LCA, which gives an overlap of 66 degrees. For a typical performance-headed 350, the optimal LCA is usually 108 degrees.
How is camshaft centerline calculated?
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. Sometimes you find a very mild or stock cam where the IO occurs after TDC (ATDC). In this case just add the IO figure to one half of the duration.
What gives a cam a lopey idle?
For the low-buck street guy to get a lopey idle and see an increase in power without a drastic decrease in driveability, he needs a cam with a lobe-separation angle of 110 degreesthe same lobe lift as recommended earlierand duration numbers of about 218 degrees at .
What does a Stage 3 cam do?
The LS1 Stage 3 camshaft was designed for enthusiast who want to increase power while maintaining excellent drivability and manners. This cams can be used with stock torque converters, stock rear gears, stock intake manifold, stock exhaust manifolds etc.
What makes a camshaft lopey?
Lope is a result of the intake and exhaust valves both being open at the same time. This is called overlap. Mild cams have little or no overlap at any valve opening that makes a difference. Hotter aftermarket type cams have a lot because it aids high RPM breathing.
