Keshav - Preinjection is primarily a refinement factor and most lower end CRDI cars do away with 2 to 3 preinjections, completed in 8-12 deg of crank rotations at idle and merges into 1 or 2 injections as the revs go high.
We are testing max flow capabilities of OE injectors so you can expect that data soon.
Increasing fuel pressure to increase fuelling with ability to adjust with respect to boost, driving style, etc should be fun !!
And dude, guys like you should be busy tuning and not worry about lower level details like these
