DIV 1 rally/track 4AGE(objective +- 130 whp)

[Bean]

As mentioned before, YES my setup is a bit overkill for what you are aiming for but then again would keep it as reliable as our engines are in OEM setup.
For what's it worth robokill managed to extract the power you are aiming for with just a set of cams and altered oem exhaust system.
Again your goal is doable without issues in many ways, depends on the budget what extras you will get. Simply drop some mild cams in there along with a thiner headgasket and you could be already there.

I heared only good things about WEIR and plan to fit the same once needed.

Regarding fuel, in the US they take calculate (RON + MON)/2 so it's probably closer to 95 in europe (check at the gas station some state the MON figure as well in very small letters somewhere).
The poncams are nice but 12:1 is rather high for the fuel we have. You could still use them with a lower CR but final figures would be obviously lower.
Another thing to keep in mind is the oem exhaust has one particular bottleneck due to the way it was made. If you look closely you'll see that the loop over the axle wasn't mandrel bent and so causes a restriction. You could redo that part or like robokill on his old exhaust cut just where the 2->1 section is and run a straight pipe with a slightly bigger diameter to the back under axle style.