Little update (and correction previous one message; 0-100km/h time was 7,7sek).
Last weekend I tightened turbos waste gate open pressure. Now max. over boost pressure is 0,5bar. Turbo reach that 0,5bar in low rpm, even somewhere 3000rpm and up. But when rpm goes high, max boost pressure drops about to 0,4bar. My assume is that when waste gate opens at full throttle in high rpm, turbo loses its rotation energy and can not reach again max boost. I make some Google search about that turbo: Renault says its -low torque turbo- etc.. (I dont remember excatly words). So that explain why over boost drops at full throttle from mid range to high rpm.
Most special is that I still drive with stock ECM program and stock fuel injectors with stock fuel pressure. And still fuel/air ratio is correct at all situations. Excample in full throttle acceleration 4. and 5. gear Fuel mixture is -RICH- (I have only original lambda sensor) So engine gets enough fuel even 0,5bar over boost. How that can be possible?
When I get some one to make videos at next test drive, then I can give some material to you.