4 Stroke Engine Modification Style1. If point A touches the trigger, the valve began to open up and will be full after a head protrusion (point B).
2. After passing through the peak, the valve back down and closed the meeting after point C.
3. From A to C and then rising and then back to B is called the duration Noken as.
4. Highest Lift determine bulge Max.
5. The form of the surface bulge profile and determine the acceleration of valve closure by the form of the surface profile prominent.
Lift MAX
How to determine the Max Lift the motor racing:
In theory for standard motor, Lift Max is 23% of the diameter in the valve. Then, for the motor racing circuit is not very long, Max Lift approximately 29% - 31% of the diameter in the valve. To race with the long circuit, Max Lift can be studied up to 35% of the diameter of the valve.
Duration
How to calculate the duration of several ways:
1. Duration is calculated after the 1.27 mm valve lift on the valve setting of 0 (zerro).
2. Duration is calculated at the time the valve starts to open the valve on the 0.10 mm.
To facilitate the creation, we will use the second way. Before we want to determine the length of numbers, we must first know how LC (lobe center) on Noken as we will modify.
To know the LC, we must install Noken as the engine and measure with a protractor mounted on the crutch as the left / magnet.
For example:
LC TO JUPITER Z: 103
We want the duration of 310 degrees.
How many degrees in the open and close in degrees?
To Search for a calculation in close:
310 - 180 - 52 = 78
That means that for LC 103 IF WE want duration duration is 301 FIGURES:
IN OPEN BEFORE 52 tma
CLOSE IN 78 AFTER TMB
For the duration of motor racing is ideally 29 - 33.
Max lift for the duration of motor racing is ideally:
7.5 mm - 8.3 mm
Benefits of using a high lift and duration of:
- Power engine to be very large
- Engine is very good on lap top
Loss using a high lift and duration of:
- On lap down less good
- Per the valve does not become a lasting
- Floating valve / float valve when the pear is not strong
- Holes the valve on the piston must be in
HOW hone CAM
- The Base Circle digrinda approximately 18 to meet the desired lift
- Then followed by hone the ram to determine the duration
- Hone the flank lift to determine O / L and form the profile
- Try Kem in the hone with a flat and smooth to ensure that the rocker arm and reducing fixed durable floating.