No, sorry. The "start of injection" is always 24 or 26 degrees before
TDC -- that is when the rising plunger covers the fill slot in the
sleeve and pressure starts building.
The nub on the governor shaft arm for the RIV system goes past the
center of the hole at 15 degrees ATDC. I do not know why Bosch chose
to set it this way, but I suspect it has something to do with internal
geometry that was already designed and it was not worth the engineering
effort to change (I believe the "nub" is on part of the governor
assembly that was pre-existing). The location of the hole was
determined by the presence of the fuel gallery, the governor and
linage, and the presence of the engine block on one side -- pretty much
limited to the outside of the rear of the pump. Difficult (or maybe
impossible) to get that hall effect "nub" to go past a coil in any
other position.
In other words, the hall effect pickup triggers at 15 degrees ATDC when
the plunger covers the fill slot at 24 degrees BTDC.
Peter
