Normally the pressure transducer in the glowplug measures up to 200 bar (at least the denso ones, dunno what the 2009+ us spec tdi uses), but the control is only used during part load (emission area) at fulload the timing is open loop.
basicly what you do is make a base timing map that is good and then use the feedback from the calculated 50% mass burned fraction to shift the timing a certain amount from the base map, to make up for changes in fuel quality etc etc
anyway, for what you are trying to achieve it is way over the head, as you won't be running any EU6 or equivalent emission regulation there also won't be any need for such a precise mbf50 control
better focus on making decent base maps (can be read directly from the logs, or even easier from the stock ecu file)
as for pilots, this engine uses double pilot till quite high rpm, IIRC till 4000, then it goes to single pilot..
double pilot is also something you wont need in a vehicle like that, as it will cause more harm than good. so run a single pilot, at low load around 1-1.5mg and at medium load you can go till max 2.5 or so, separation (from end of pilot till start of main) dont go under 700-800us and max about 2000 us.. if you want to run double pilot and do things right thing will get really complex as you need pressure wave correction etc etc
if you look for my posts, I posted stock duration map somewhere from this engine, so that should give you already a serious headstart to get it running right
