Wastegate Turbo leak?

[viejevox]

Hi all.

I'm having boost leak after turbo upgrade for 17 Golf R with eurodyne maestro. I try setting voltage at 3.6 and 3.3 with no results. Here is the datalog for reference. No boost leak before throttle.

https://datazap.me/u/viejevox/wastegate-issues?log=0&data=1

 

[Diggs24]

What turbo and who is tuning?

 

[viejevox]

What turbo and who is tuning?

m520h. Frank base map.

 

[JerseyDrew77]

Oh boy, I'm not touching this one even with a 10 ft. pole.

 

[Gvazquez]

Smoke test? Have you checked all the couplings?

 

[Diggs24]

Not a boost leak or it wouldn't hit target at 5300. I'd say it's a combo of a faulty turbo and elevation. It shouldn't take 85% gate to make 26 psi, even way up there.

 

[viejevox]

Smoke test? Have you checked all the couplings?

Yes. Solid 0 smoke leak

 

[viejevox]

Not a boost leak or it wouldn't hit target at 5300. I'd say it's a combo of a faulty turbo and elevation. It shouldn't take 85% gate to make 26 psi, even way up there.

I forgot an important point. I'm at 4500 Feet elevation.

 

[Diggs24]

Yes, I can see that in the log.

 

[Gvazquez]

I forgot an important point. I'm at 4500 Feet elevation.

There's the answer. The turbo seems a little lazy too so just make sure you can reach in the actuator arm and move it freely by hand with no obstruction

 

[viejevox]

There's the answer. The turbo seems a little lazy too so just make sure you can reach in the actuator arm and move it freely by hand with no obstru

 

[viejevox]

Its move ok. I used the open/close option in the vcds to see wastegate movement. My only though is the waste gate is opening too much early?

 

[jimlloyd40]

Voltage is still okay?

 

[viejevox]

Voltage is still okay?

Yes.

 

[Gvazquez]

The only way its possible is if you had a really inefficient turbo design or if it had a leak at the turbo like where the turbine to compressor housing meet or something similar to that. If you're confident you have no other leaks there than I'd suspect the other options I just mentioned. Something also possible is of you're running a different pcv plate, the N80 valve or purge valve could be seeing positive pressure instead of a vacuum and cause a boost leak. I think that might be happening to my setup currently