Hello all,

i did a few Golf V GTI all with stock components. Typically there are the AXX and the BWA Engine.
Whenever i tuned the AXX Engine, i wonder why actual boost can not get higher than 1 bar - or more like 0,95bar.
On BWA it´s no problem. Of course i can request more or in other words as much as MED9 can give on both, but only the BWA is able to boost as requested.
The WGDC is fine. There are no mechanical issues or boostleaks. So why is the Turbo on the AXX Engine not able to boost more than 1 bar??
In my opinion it only can be because of a different WG actuator since the components like air intake and exhaust are the same.
What is your experience? Or have i overlooked something?

Many Greets
Armin

Yes you‘re right when you say they are all old now and often treatet hard