Unnötiger VTG-Laderverschleiß nach Motorstarts? | Posts 16+

Bertil wrote:

Even after heavy loads, the turbo should be given a short "cooling-down" period.

Hmm, and what would be a sensible thing to do in that situation, if suddenly, after a section running at maximum power, only deceleration and idling are required (e.g., you suddenly reach the end of a traffic jam after driving at high speed on the highway, or you enter a slow-moving traffic situation with speeds of around 80 km/h in all lanes)?
Or, what shouldn't you do?

Quote:

. . . that warming up after a cold start due to frost likely takes significantly more time than the approximately 10 seconds I have estimated for establishing a safe level of lubrication for the charger? So, you're definitely going to be all over that...

That would be a nice feature for chip tuning customers who are conscious of fuel consumption: for example, for 3 minutes after a cold start, it could quietly "tucker" along as an SDI, and then the engine control unit (ECU) suddenly throws the belt onto the turbo .


Yesterday, I actually tried out the first 3 minutes with the ALH-Ibi, after my partner mentioned that it suddenly wasn't pulling at the top anymore.
In the last operation, I had to disconnect the plug from the LD/LLT sensor and forgot to plug it back in .
However, it's quite clever how the MSG works: the VTG (Variable Transmission Gear) remained completely open (LDA display = 0) because that was the most reliable way to prevent damage.
While there wasn't a noticeable power surge, the acceleration from the low-rev range actually felt a bit stronger than usual, according to my "butt dyno." However, it became noticeably sluggish from around 1700 rpm onwards, and even with full throttle, the engine struggled to reach 4000 rpm in third gear on a flat surface. *yawn*

Ulf and his thoughts....

I also assume that a certain amount of static pressure will always be present on the supply line leading to the charger.

If things are as Bertil describes, then after a long period of running at full throttle, the problem will be cooling down the turbocharger.


"edit"

@ Ulf

You typed faster than me again .

/edit

ulf wrote:

Hmm, and what could be a sensible course of action in that situation, when suddenly, after a section with the maximum speed (Pmax), only deceleration and idling are required (e.g., you suddenly come to a standstill at the end of a traffic jam after driving at a high speed on the highway, or you enter a traffic situation with a speed limit of approximately 80 km/h on all lanes)? Or, what shouldn't you do?

Regarding the first question: That's not really a problem.
Regarding the second question: Do not stop immediately.

Letting the dog walk itself out, or letting it run around while standing still, isn't usually a major problem.
"When I have the water heater hooked up, I let the engine run for a short time after the initial load. Usually, I drive very carefully for the last few meters to a rest stop or parking area. Even a very short run time (30-60 seconds) is often sufficient."
Even though it's not very environmentally friendly, I do it. The oil is also pumped through the charger when the engine is idling, which provides some cooling. Even without airflow (which hardly reaches the charger anyway, especially with a side-mounted installation), the cooling effect while idling is definitely better than the "immediate stop." How long you let the engine run after turning it off is really a matter of personal preference. Some people let it run for several minutes.

Quote:

That would be a nice feature for chip tuning customers who are conscious of fuel consumption: for example, for 3 minutes after a cold start, it could quietly "tucker" along as an SDI, and then the engine control unit (ECU) suddenly engages the turbocharger .

and then the driver suddenly loses all expression on his face...

When I see how some of my colleagues treat their cars, it seems like everything is fine .

3 Phasen Biber wrote:

When I see how some of my colleagues treat their cars, it seems like everything is fine

.

At least under "normal" temperatures and without a heavy load (including trailers), you're unlikely to reach a point where extreme caution is absolutely necessary.
I wouldn't describe that as "no problem."

Just a quick reminder: I typically use about 5.5 liters per 100 kilometers when driving solo. With a trailer attached, that can range from 8.5 to 12 liters per 100 kilometers. That gives you an idea of the "extra load."

Bertil wrote:

Quote: That would be a nice feature for chip tuning customers who are conscious of fuel consumption: for example, for 3 minutes after a cold start, it could quietly "tucker" along as an SDI, and then the engine control unit (ECU) suddenly engages the turbocharger belt . and then the driver suddenly loses all expression ....

For example, if he's driving his ASZ or ARL, going full throttle and around 2500-3000 rpm on an incline, and suddenly the LD jumps from zero to full power, it's quite something: every TDI enthusiast would be incredibly envious of the feeling, which would be like a kick to the ribs, thanks to typical "Boah-ey" tuning software.

Hi Ulf!

"I remember a TV segment where Walter Röhrl got into the new 911 GT2 on a test track, started it, and immediately launched like a rocket. I believe... if anyone knows how to handle turbos, or cars in general, especially at the limit, it's probably him. Or does Porsche do things differently, and does it not matter to the 911 Turbo, GT2, etc. whether you apply full throttle immediately? I can't say anything about that."

But it's an interesting topic!

Greetings.

Mike3BG wrote:

Hi Ulf! "I remember a TV segment where Walter Röhrl got into the new 911 GT2 on a test track, started it, and immediately launched like a rocket. I believe... if anyone knows how to handle turbos, or cars in general, especially at the limit, it's probably him. Or does Porsche do things differently, and does it not matter to the 911 Turbo, GT2, etc. whether you apply full throttle immediately? I can't say anything about that." But it's an interesting topic! Greetings

Hey, was that a commercial or something?