_DEFINE0_ Ladelufttemperatur _DEFINE1_ am Audi A3 (Articles)

Last edited on 05-08-2012, 12:28, edited 1 time in total.

Intake air temperature on Audi A3 TD I , Engine code AHF

_DEFINE12. This article describes the behavior of the intake air temperature with the example of the Audi A3, engine code AHF (110PS TDI).

Historical Background

Due to a faulty repair of the front bumper of my A3, I resorted to self-help to restore the correct ventilation of the air-to-water cooler.

Here, I attempted to optimize the cooling of the air-to-water cooler by using the airflow, by making the ventilation front as wide as possible and additionally installing ventilation holes in the wheel arch on the back of the air-to-water cooler. The ventilation holes in the wheel arch, because the distance between the air-to-water cooler and the wheel arch is only a few cm, and before the warmed cooling air could only flow directly downwards through the air-to-water cooler.

Modified Airflow:

Air ducts closed for measurement:

Luftabführung, Ladeluftkühler

For comparison, the original air intake of a similar vehicle:

Luftzuführung, Ladeluftkühler original

Luftzuführung, Ladeluftkühler original, groß

Measurement of the intake air temperature

To determine whether the ventilation openings in the wheel arch have an effect on the intake air temperature, this was recorded using a diagnostic tool, with both the ventilation openings closed and open.

Measurement conditions:

Outside temperature 19°C
Boost pressure at > 190 km/h ~1.05 bar (full throttle)
Two measurements in opposite directions

Measurement values

Ladelufttemperatur, offen, Gegenrichtung

Result

The openings in the wheel arch do not significantly change the intake air temperature.
Therefore, the openings available as accessories for the wheel arch are not relevant for the ventilation of the air-to-water cooler, at least for this vehicle model.
Whether the slightly enlarged air intake openings at the front, compared to the original, have any effect, can also be doubted.
If anyone has the opportunity to measure the maximum intake air temperature at high speed on their TDI (110PS, engine code AHF, AFN etc.), I would appreciate it if they could share the results.

Therefore, before cutting into the Radhausschale (intake manifold), it is necessary to check whether the original air intake openings are sufficient after the LLK (Long Life Kit). An example where they are not sufficient is the Skoda Fabia with the RS bumper.

Further options for reducing the intake air temperature include installing a larger air-to-water intercooler or water spraying before the air-to-water intercooler.

_DEFINE0_ Ladelufttemperatur _DEFINE1_ am Audi A3
dieselschrauber 10-03-2007, 17:58
Intake air temperature on Audi A3 TD I , Engine code AHF _DEFINE12. This article describes the behavior of the intake air temperature with the example of the Audi A3, engine code AHF (110PS TDI). Historical Background Due to a faulty repair of the front bumper of my A3, I resorted to self-help to restore the correct ventilation of the air-to-water cooler. Here, I attempted to optimize the cooling of the air-to-water cooler by using the airflow, by making the ventilation front as wide as possible and additionally installing ventilation holes in the wheel arch on the back of the air-to-water cooler. The ventilation holes in the wheel arch, because the distance between the air-to-water cooler and the wheel arch is only a few cm, and before the warmed cooling air could only flow directly downwards through the air-to-water cooler. Modified Airflow: Air ducts closed for measurement: For comparison, the original air intake of a similar vehicle: Measurement of the intake air temperature To determine whether the ventilation openings in the wheel arch have an effect on the intake air temperature, this was recorded using a diagnostic tool, with both the ventilation openings closed and open. Measurement conditions: Outside temperature 19°C Boost pressure at > 190 km/h ~1.05 bar (full throttle) Two measurements in opposite directions Measurement values Result The openings in the wheel arch do not significantly change the intake air temperature. Therefore, the openings available as accessories for the wheel arch are not relevant for the ventilation of the air-to-water cooler, at least for this vehicle model. Whether the slightly enlarged air intake openings at the front, compared to the original, have any effect, can also be doubted. If anyone has the opportunity to measure the maximum intake air temperature at high speed on their TDI (110PS, engine code AHF, AFN etc.), I would appreciate it if they could share the results. Therefore, before cutting into the Radhausschale (intake manifold), it is necessary to check whether the original air intake openings are sufficient after the LLK (Long Life Kit). An example where they are not sufficient is the Skoda Fabia with the RS bumper. Further options for reducing the intake air temperature include installing a larger air-to-water intercooler or water spraying before the air-to-water intercooler. Last edited on 05-08-2012, 12:28, edited 1 time in total.

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