Dear frens ,
So after many people start to discuss about side gapping spark plug , here another method of screwing in spark plug so that the gap is facing the exhaust valve.
I quote : The ideal position of the plug is such that the gap is facing towards the valves, preferably the exhaust valve.
"There is a lot of debate and skepticism to whether or not spark plug indexing is worth the effort. Some studies have shown 1-2% of total engine power can be lost through poor spark direction.
Indexing spark plugs has been practiced by motoring enthusiasts for many years. The technique has been used by racers to obtain maximum combustion efficiency within each cylinder, and also to maintain consistent combustion between all cylinders. The object of indexing spark plugs is to ensure that a spark plugs ground electrode is not positioned in such a way where it is shielding the spark from the fuel/air charge or impeding the flame front as it travels away from the spark plug into the chamber. The ideal position of the plug in the head is such that the gap is facing towards the valves, so that the spark is fully visible to, and aimed at, the center of the combustion chamber.
http://www.fordmuscle.com/archives/2000/07/indexplugs/index.shtml
So happy gapping and indexing
So after many people start to discuss about side gapping spark plug , here another method of screwing in spark plug so that the gap is facing the exhaust valve.
I quote : The ideal position of the plug is such that the gap is facing towards the valves, preferably the exhaust valve.
"There is a lot of debate and skepticism to whether or not spark plug indexing is worth the effort. Some studies have shown 1-2% of total engine power can be lost through poor spark direction.
Indexing spark plugs has been practiced by motoring enthusiasts for many years. The technique has been used by racers to obtain maximum combustion efficiency within each cylinder, and also to maintain consistent combustion between all cylinders. The object of indexing spark plugs is to ensure that a spark plugs ground electrode is not positioned in such a way where it is shielding the spark from the fuel/air charge or impeding the flame front as it travels away from the spark plug into the chamber. The ideal position of the plug in the head is such that the gap is facing towards the valves, so that the spark is fully visible to, and aimed at, the center of the combustion chamber.
http://www.fordmuscle.com/archives/2000/07/indexplugs/index.shtml
So happy gapping and indexing