Injecting prior to turbo comp' impellers

[leman_opc]

Some more testing today after I sorted my flow issues (it appears that a dual nozzle setup with a checkvalve on one nozzle only is a no-no, now I put in a checkvalve for each nozzle). Had two different runs:
1. 0,5 mm nozzle preturbo, 0,3 mm nozzle post-IC. 805 kg/h air consumption, knock retards up to 9 degrees.
2. 0,5 mm nozzle preturbo, 0,5 mm nozzle post-IC. 805 kg/h air consumption, knock retards peaking 8 degrees in 1 cylinder, but generally up to 5 degrees.

So, the major outcome is that the concept finally works, 2% increase in air consumption is not much but the pure fact is important. Furthermore it has been noted above that the gains may be higher power-wise.

Previously I obviously was not injecting enough preturbo due to flow distribution problems. Will have a more detailed look on the logs next days.