spark position
also called how far the spark sits into the chamber · projection
How far the spark itself sits beyond the end of the shell, as a length — the number two of the four makers publish per part under their own field names. Bosch heads a catalogue column "Thread length / Spark position" and carries values from 1 to 7 mm across fourteen codes, publishing 3 mm for the Super 4 WR78X; Denso publishes 1.5 mm projection for the IK22 and defines its plug-shape code `X` as "full projected (2.5 mm projection)". Denso also calls this fact, in its own reach table, "Electrode Position" — which is why this batch's electrode qualifier is deliberately named `electrode_side` instead. Distinct from `thread_reach`, which is the shell's threaded length and is measured to the seat, not to the spark.
Spark position is a measured figure, given in millimeters or inches.
It belongs to measurement — its measurable, physical facts.
asked by the kinds that answer it
1 kind answers it, each for a single value. The same question can be reused by unrelated kinds — one meaning, many homes.
asked by kinds that answer it
The same question can be reused by unrelated kinds — one meaning, many homes.
| kind | how many |
|---|---|
| spark plug | one |