M50 Stroker injection timing question/opinion requested

[m50b30ish]

Hello everyone been making progress in general now running in closed loop with pretty decent results.

Just have a question regarding injection timing theory

I understand that normally on this engine injection timing doesn't have too much effect but since it has m3 cams, low comp pistons, and especially bigger injectors I feel like it is hard to listen to stock suggestions 

I understand that the tuning process is to adjust to see which angle creates the most rich lambda fair enough I just won't be on a dyno for a little bit so more focused on theory 

From my research the idea is that it is better to inject on a closed intake valve for fuel atomization, however with larger overlap this can create problems and open valve injection might be a better idea and also is better for cylinder cooling, knock prevention etc

The stock value for end of injection was at 470 which seemed way too early to me I have played with various numbers have it set at 360 across the board right now

Also I see opposing opinions that in theory the timing should go down as rpm goes up, or the opposite which I can understand the theory on both

The camshaft specs are 
M50/M52 cam specs:
Intake Lobe Duration: 252°
Exhaust Lobe Duration: 244°
Intake Valve Lift: 10.2mm
Exhaust Valve Lift: 9.5mm
Intake Valve Lift @ TDC: 0.3-3.2mm
Exhaust Valve Lift @ TDC: 0.8mm
Intake Valve Timing (IO-IC): 10-62 35-37
Exhaust Valve Timing (EO-EC): 48-16

The most specific question I can ask, is: does this camshaft have enough overlap that I should be worried about scavenging unburnt fuel during overlap, or reverberation back into intake? If not then closed valve injection would be best? If not please explain

I am still very new to this and after my initial research I determined open valve injection is best. Now I am thinking that closed valve injection will be better for low load, and open valve injection might help knock prevention at high load

Curious of general opinions and those specific to my question although I know at the end of the day probably isn't too imporant compared to other aspects of tune

The theory is very interesting and I'm curious to hear various opinions based on overlap etc

As always thank you everyone that reads! 

Best

[Adamw]

At idle you dont need a dyno, adjust injector timing until the reported lambda is richest for a given PW, without very specialised instrumentation, this is the only way to verify the largest proportion of injected fuel is being combusted - which is the aim in this case.   Low load injector timing wont be much different than idle timing as the manifold dynamics are usually much the same.  The best injection instant will usually trend more advanced as RPM increases as logic would suggest.  

Nearly always for typical automotive engines with injector placement close to the valves, the best injection instant works out with most fuel being injected onto a closed valve (at normal operating temp). 

I dont remember the last time I found an engine that gave best performance with injection in an open port, and I mostly do NA race engines with injectors sized to give most benefit from injection timing.  The main applications I can think of where I have found quite different needs is with injectors on the outside of the throttles.  

[m50b30ish]

Thank you Adam makes sense