E3 DiamondFire spark plugs

The exclusive E3 earth electrode incorporates the combined benefits of several types of known performance spark plugs, as well as new science based on years of research into spark plugs. The three main performance components that determine how the E3 DiamondFIRE configuration works are:
 
 ● Open ground electrode design 
This mimics surface gap spark plugs like the type used in rotary engines, directing the flame kernel at the piston more directly than traditional J-wire designs. This design reduces travel time from the spark zone to the chamber containing the compressed gases. The open section at the top of the electrode prevents the creation of the doughnut-shaped flame kernel known from standard spark plugs. Given the brief amount of time available to initiate combustion, the faster you can direct the flame at the area above the piston, the better the combustion.
 
 ● Forward projection in the spark zone
With retracted spark plug designs, the spark generated sits against the top of the combustion chamber surface. The E3 ground electrode is designed to project further forward into the combustion chamber. This brings the spark zone closer to the areas of likely good air-fuel mixture. The outward projection also creates a beneficial micro-aerodynamics within the spark zone. Since the initial combustion wave leaves the spark area at supersonic speeds, the raised edge of the E3 electrode provides a kind of chimney effect as the next air-fuel mixture enters the spark zone.
 
● Edge-to-edge spark discharge
The strongest part of the E3 electrode design is the forced edge-to-edge spark discharge, which proved to be the best way to direct a spark as it leaves the electrode surface. Since the spark itself occurs only when an avalanche of electrons migrates from the two electrodes (cathode to anode), sharp edges are better at initiating the migrations and the accelerated electrons collide within the spark zone.


Specifications


OEM
31629-78


Pack
1


HS Code
8714109090


Origin
US


Motorcycle family
Big Twin | Dyna | FX | FXR | Softail | Sportster | Touring