VTG Turbo Adjustment: Setting the Control Rod

Hi,
It refers to the control rod that connects the variable geometry turbocharger (specifically, the VNT15 in this case, although I believe the question is generally applicable) to the adjustment ring and the vacuum actuator.

A small lever is located on the adjustment ring near the wave, and a rod is attached to this lever, which in turn connects to the vacuum actuator.

This lever on the shaft has an external mechanical stop with an adjustable stop screw.

Is it true that the turbine wheel is exposed to the maximum flow of air when the lever is fully engaged (i.e., at maximum compressor output)?

If the N75 valve is operating at its maximum duty cycle (e.g., during idle after engine start), meaning the maximum travel of the control rod/vacuum actuator has been reached, is it permissible for the lever to rest against its end stop?

Regards,
Jens.

Please search for "ASV assessment".

There's a three-page thread where I initially had to figure things out and get acquainted with the system.

In the ASV system, the rod moves DOWN - hanging container.

When the rod is positioned at the very bottom, against the adjustable stop, it provides maximum pressure.

Can you also see it with your finger and VAGCOM while idling? (Sometimes you can even hear the turbo spooling up.)

m;

It's very difficult to compensate for a twisted thread! #

Otherwise, I'm setting up the pressure gauge like this: 50 mbar when opening, and 600 mbar at the maximum pressure!

Best, Tom.

(You can spend a little time with that!)