When replacing the spark plugs, you should pay attention to the gap or the gap between the electrodes with plug head. Therefore, there is the size recommended by the manufacturer. For example, 0.6 mm. So, do not be too tight. Also, should not be too tenuous. Especially if it's too loose. Conditions that can cause missfire. Sparks, can not create a perfect combustion. Finally, stationary or idle so baseball is stable.
Can also make the coil quickly die. Because the tenuous gap, the coil is forced to work harder. Similarly, if too tight. Rev the engine can be more severe and make heat. Other effects, knocking.
Slightly More Details about SPARK:
function Busi
Spark plugs are one of the important components in the machine.
This guidance became a reference for technicians, hobbyists, or race mechanic in understanding, using, and a spark plug problem. The information in this reference can be used as a benchmark for all types of four-stroke engine spark plug (internal combustion)
Spark plugs are the "window" in the engine that can be used to search for diagnostic information state of the engine (read: AFR). An example of a doctor who used a thermometer to measure the heat of the patient, state of the plugs showed symptoms or anomalous conditions in the combustion chamber. The tuner specialist can read the source of this phenomenon as a search problem commonly caused by the ratio of air and fuel, spark acceleration, carbon deposits, fuel quality (read: octane)
BUSI INITIAL FUNCTION:
Busi has two main functions:
1 Burn the mixture of air and gasoline
2 Transferring heat from the burning after to before
Spark plugs and drain the electrical energy convert fuel into energy. Intake should be enough of a power source for the ignition system of an electric spark between the spark plug gap (read: cathode + anode). The spark is called "Performance Ignition Spark Plug"
The spark plug tip temperature must be maintained at a temperature as low as possible to prevent "pre-ignition" (commonly called: knocking) but as high as possible to prevent "fouling" (commonly called .: miss ignite / fire).
This temperature is called "Busi Temperature Performance".
Keep in mind the spark plug works as a heat exchanger by removing the excess heat out of the combustion chamber and heat transfer of energy to the engine cooling system. The heat range of the spark plug can be measured by the ability to dissipate heat
The rate of heat transfer ability of the spark plug can be viewed via:
1 The length of the spark plug insulator
Gas volume around the insulator 2
3 Materials electrode (spark plug tip "iridium, platinum, chopper, etc.") and the porcelain insulator (quality ceramic material)
- Length of porcelain insulator and its ability to absorb and transfer heat combustion chamber
- Porcelain insulator materials and electrode materials "iridium, platinum, chopper, etc."
Here is a picture of the level measurement of heat flow from the heat and NGK spark plug
Insulator length is the distance from the tip of the electrode (read: firing tip) to the base of the insulator. Because the electrode tip is the hottest part of the spark plug normally this is where the problem (Pre-Ignition) & (fouling). Wherever plugs used both in ship, automobile, motorcycle, plow land, etc., end plugs should be constant at temperatures between 500C - 850C. If the spark plug tip temperature is less than 500C, insulator surrounding the electrode is possible not hot enough to burn the carbon and deposits in the combustion chamber resulting in a buildup of deposits can be made (Fouling) which will result in (Miss Fire). If the tip of the spark plug is hotter than 850C it will be overheated spark plug insulator which damages the electrode melt more-over, it will result in (Pre-ignition / detonation) and damaging the engine. Each spark plug with identical code has a certain tolerance range between 70C heat exhaust to 100C in the combustion chamber. Change the spark plug gap will raise or lower the temperature between 10C to 20C
The condition of the spark plug tip and the circumstances
There are three basic diagnostic criteria for spark plugs: good, too cold, too hot. The boundary between the optimal temperature where these conditions have characteristic "cleansing". The temperature at that point will burn piles of carbon and deposits.
Keep in mind that the length of the insulator determines the heat range of the spark plug factor, the longer the insulator the more heat is absorbed then the heat will spread through the "water jacket" and the cylinder head. Spark plugs keep the heat high hot working burn oil and carbon deposits in the combustion chamber and not related to the quality of the spark or spark acceleration.
Instead of cold spark plug has a shorter insulator and absorbs less heat from the combustion chamber. The heat radiating short distance, and make performance spark plugs at low temperatures. Low temperature range is needed if the machine was modified for high-performance, towing heavy loads, or high-rev engine in a long time. Cold spark plug dissipates heat quickly, reducing the potential (pre-ignition / detonation).
Below is a list of factors that affect the temperature range plugs. The indications or conditions may adversely affect the temperature range of the spark plug.
Air / fuel mixture to seriously affect engine performance and spark plugs optimal temperature range.
Air / fuel mixture that many (read: rich mixture) makes the temperature at the tip of the spark plug down and may cause fouling (miss ignite / fire)
Air / fuel mixture slightly (read: lean mixture) makes the temperature in the high end of the spark plug, can lead to pre-ignition / detonation.
It's important to read spark plugs anomalies when tuning the engine to get the air / fuel mixture that is optimal
High compression ratio / forced induction also make the temperature range spark plugs and combustion chamber temperatures to be increased
High compression can be obtained using the following method:
a) reducing combustion chamber volume (ie: the piston dome, the dome of the cylinder head is smaller, slip head, etc.)
b) adding forced induction (eg: NOS, turbocharger, supercharger)
c) replacement Noken (read: camshaft)
When the high compression needed plugs into the cold, high octane gasoline, and special attention to ignition timing and air / fuel mixture.
Advancing the ignition timing
By accelerating the ignition timing for each - / 10 degrees can increase the temperature range of the spark plug 70 to 100 degrees Celsius
Turnover machine and Expense
Increasing the range of the spark plug tip temperature can occur in accordance with the rotation of the engine and heavy loads. When traveling with the high-rev engine or carrying heavy loads, it is highly recommended standardization of plugs cold temperature ambient temperature
When the temperature drops (cold air), the density of water in the air to change the ratio of rising gasoline makes mixtures into many (read: rich mixture) this leads to a decrease in the temperature of the engine and spark plug tip temperature range. So the flow of gas should be minimized.
When the temperature rises (hot air), water in the air density decreases with the lack of density in the intake, therefore the gas flow must be propagated humidity
• A mixture of air / gas should be set slightly, depending on the state of the surrounding air.
Barometric pressure / altitude
Affect the temperature range of the spark plug tip
The higher the geographical, the lower the compression engine. When the cylinder temperatures down as well as the temperature at the spark plug end of the temperature range
Many mechanics try to "catch up" (read: trick) tuning by replacing the spark plugs with heat
Another way is to adjust the air / fuel mixture to inhibit the flow of air into the engine to
Type of abnormal combustion
Pre-ignition, ignition is air / fuel mixture before ignition coordinate point tolerance
Caused by the presence of hot spots in the combustion chamber ... also caused (triggered) too rapid advancement of ignition timing, spark plug too hot, low octane gasoline, air / fuel mixture slightly, the compression is too high or the failure of the engine cooling system by raising octane, cold spark plugs installed, multiply gasoline blends can resolve the issue
Can rewind the ignition timing and check the engine cooling system
Pre-ignition will lead to detonation; pre-ignition and detonation are two different events
