Hi there!

Im New here and just introduced myself,

I need a new wastegate actuator for my t4, its worn and blows through the flapper arm, resulting in too high boost pressures..

Engine is b4194t stock 147kw/200hp
Turbo mitsubishi td04l 14t
Previous owner told me it was mapped with a stage 1 map and should have 235hp
It has an open exhaust 2.5/3"


Ive searched the web for hours but i cant find a solid answer

What is the stock spring pressure of this turbo rated at?
Found on the Internet some People say 0.3 bar, some 0.6 and others say 0.8... wich one is it?
I have to buy 1 from the internet/ebay cause my local turbo shop cant order it.

And i can choose for different spring pressures

0.3bar
0.5bar
0.6bar
0.8bar
1.0bar...

Wich 1 to get?

Im trying to find out how the system works
I found the stock boost pressure on this engine is about 0.8/1 bar, is this True?
Does it work Like this?: lets say wg actuator spring is 0.3 bar, is the stock tcv or boost solenoid (how its called..) bleeding the pressure to Like 1 bar of intake pressure? Is this correct?
What happens if i install a havier spring Like 0.8bar, does the ecu compensates this to bleed the tcv more? Or will the boost become higher than the stock pressure?

Sorry for my english i hope you guys understand

Thanks in advance