30c-Tuningidee für PD-Motoren | Posts 48+

ulf wrote:

bloeckler wrote: Persistent high speed above 3500 RPM and failure to reach the specified speed - accompanied by a noticeable power drop from 3750 RPM That pretty much matches my experiences. However, I had far from a 12% performance surplus according to the DZR.

Was was 3-4° too late set, and reached 4000 RPM on a subsequent test run. The shaking hasn't changed.

Just for completeness:

http://www.tdipower.de/shop/powerboxes_for_vag_tdi_pump_housing.htm

The connectors offered here are nothing more than a fixed resistor inside a plastic housing, with the connector being blind-molded to the cable.

Proud Price. [/list]

@ulf

I'm hearing you say it again: 'Yes, yes, Digitalist!'

but I have an idea for your story, since the coolant temperature sensor obviously doesn't provide the 'powerful' performance that one might expect.

How about implementing the entire salad using MC and a digital potentiometer? You would simply need a digital potentiometer that can handle a 30mA current. Assuming that the diesel temperature sensor has 5 or 12V applied and that the STG measures the current, an input-side I-U conversion would also be necessary, as the MC can only evaluate voltages from the ADC. However, this is not the main problem!

bloeckler wrote:

The connectors offered here are essentially nothing more than a fixed resistor within a plastic housing, with the connector itself being blind-molded to the cable. Is that correct?

There were at least some boxes offered like that.
What's inside is hard to imagine...

@JörgS:
The leakage current in a short circuit is approximately 6.5 mA (5V with a 750 Ohm pull-up resistor).
Of course, it is possible to create a digital fake - but I would rather create a switching threshold for a small relay from the cooling water voltage, which switches a fixed resistor in parallel with the original diesel sensor, than go through such a "huge" effort.
"Of course" everything analog

Hello,

I just had another idea:

At least visually, the NTC sensor fittings for diesel and water in my engine are so similar that they might be interchangeable.
I had already removed the diesel pump - this can still be done with reasonable effort + mess.
But at the water pump located at the rear of the engine, the cooling system would run dry.

According to my measurements, the resistance values shift approximately 20°C out of phase - with the water supply having the lower resistance values.

Perhaps, one could simply replace the diesel injector with a water injector (if they are the same size) and thus have a very inconspicuous modification, without losing the ability to adjust the amount via diesel temperature.
(However, one would hardly get a watering can for 30 cents )

The donors, which I mean, have a 2-pole connection, 'front' a stepped metal cap and sit in a rubber O-ring, which protects them from water/ Diesel pipe system sealed.
They are secured against sliding using a U-shaped metal clip on the cable side.

If someone has access to such devices, they might want to check if they actually have the same dimensions - at least the electrical connection or the cable-side connectors look completely identical.

Approximate resistance values at 0 / 10 / 20°C:
Diesel: 15 kOhm / 10 kOhm / 6 kOhm
Water: 6 kOhm / 3.9 kOhm / 2.6 kOhm

@ Ulf: Could you possibly provide me with the number for the water temperature sensor? Hoping it fits in the AJM as well.

It's unbelievable: The workshop can't find the Diesel & the Water Feeder 2-pole!
I'll be in touch soon!! Or is there another option?

They are even offering to sell the complete piping systems.

Greetings

Thorsten

ttns4 wrote:

@ Ulf: Could you possibly give me the number for the water temperature? Do givers give?

Now appears in the 10c article.