Hi All.

I have been at this for nearly 2 years now and while I have learnt alot, its also been frustrating. I have done numerous versions of my file to try to get the tune where I fell it is producing good power.
My main issue is the lack of punch after the car hits 4500rpm. The turbo is a GT28 ball bearing generic.
Heres some information on the tune:
> engine is forged 2.0l turbo, 4cyl
> My target rl is 200 at 1.2bar boost
> 875cc injectors
> I have targeted getting the pvdks and ps variables close because they were running nearly a 20% difference on the bottom end before
> Timing has been advanced in the top end by around 5-6 degrees after 4500rpm

As you can see from the logs:
> rl hits around 198 at 4000rpm then tapers off to ~170
> The rpm has been limited to 6200
> The airflow map kfkhfm has been adjusted by 16% at the top end with a corresponding change to kfurl to keep intake and manifold pressure similar
> ****Boost is capping out at 0.9***. In my map, I have found a map called KFTAT which seems to be a duty cycle limit which was set at 0s after 0.9b which was where the standard target pressure was set

Any help or advise would be appreciated - Its driving me nuts and I just got to get this thing right :-). Log attached - TIA

Thanks. I have changed the wastegate spring and sorted an issue out with the wastegate and the car feels much better. The issue that I am having is the ps_w and the pvdk values. I know that the pvdk has to be higher than ps_w but it just isnt the case in all my logs. This is the reason why I was increasing the furl numbers to try to reduce the ps_w values. Anyone else seen this issue?
BTW, car is now throwing a 110611 code - "boost out of range"