And here are the results with RPM boost management
The boost level is adjusted to nearly 1.3b until 5000 RPM. Beyound this, it is tappered step by step to reach arround 1.1 @ 6000 RPM
Any additionnal boost increase ( I mean from this MAP curve) in the range 5500 to 6500 doesnt provide any additionnal power. ( 1.2 bar @ 6000 even start to hurt the power curve and convert it into heating loss .... it can be seen on the dyno curve below )
No doubt, I reach here the limit of this turbo : especially the limit of the hot side ... not so bad anyway
The AFR is adjusted to a flat 12.5 curve. I still have some margin under 5500 RPM. But past 5500, the system is set at it maximum. Some additionnal fuel could be found by using C2T 3.6 injectors and by installing a bigger rear fuel pump.... but in my case, as I reach the limit of the turbo, it is useless.
There is absolutely no sign of knock ( even during some 35°C testing session ). I even do not need to use the RPM switch to reduce the additionnal timing (6°) which is provided by the FVD sensor plate.
Here is the dyno curve
496 FWHP @ 5400 RPM
669 Nm @ 4900 RPM