Ansaugwege entdrosseln beim Golf 3 - Tip | Posts 32+

Strange (in his first post) wrote about this.
that the VR6 airbox provides a practical way to de-restrict the intake path.
represents what I have, but which I cannot have due to the intake manifold on the AFN 1.9 TDI.
and apparently also on the 2.5 TDI (between the hood and the radiator grille).
may be doubted.
These [devices] actually suck in air from the front, and therefore also draw in any splashed water.
which can lead to consequences on longer journeys in the rain.
which I cannot assess.
At best, only the filter gets wet, which makes it less permeable to air.

Best regards.
Peter.

I don't really believe in the droplet theory.

Furthermore, the entire discussion revolved around Golfs with side-mounted intakes. The 2.5 TDI, with its intake location, doesn't quite fit into that theme. Unless its parts can also be installed in a Golf .

Here's an interesting observation about where the filter is most likely to get clogged.

Quote:

Strange (first post) wrote about this. that the VR6 airbox provides a practical way to de-restrict the intake path. represents what I have, but which I cannot have due to the intake manifold on the AFN 1.9 TDI. and apparently also on the 2.5 TDI (between the hood and the radiator grille). may be doubted.

Quote:

Furthermore, the entire discussion revolved around Golfs with side-mounted intakes. The 2.5 TDI, with its intake location, doesn't quite fit into that theme. Unless its parts can also be installed in a Golf

.
It seems that all G3 models suck in air from the sides. The best version is probably the one with the VR6 engine.

@neubaupe
You still haven't mentioned which vehicle you're talking about. It's probably not the G3. I only mentioned the example from my AKN (application knowledge notes) to explain the water problem (even though it doesn't really belong in this post).

No one here is suggesting that you should transplant the air filter from a G3 VR6 into a different vehicle. It would be interesting to see what the largest engine is for your vehicle and to take a closer look at the air filter housing. For example, on my Passat, which has the W8 engine.

If you want to discuss a water-related issue, please only use the G3 forum for this post. He probably has fewer problems with water, because unlike other models, it doesn't seem to let the rain in.

dieselmartin wrote:

Here's an interesting observation, showing where the filter is most heavily clogged.

This appears to be the path of the heavy dirt particles, which, depending on the position of the inner tube, are flung into the air filter housing and then guided to the filter by the shape of the lower part of the casing.

Since air also possesses inertia, I think its preferred path also passes through the dirt spot.

Without the inner tube, the dirt stain (after the same distance traveled) would likely be slightly larger but also lighter in color.

You are still not mentioning which vehicle you are talking about. Probably not from the G3.
I'm talking about the Ibiza, specifically the Seat BJ98 1.9TDI AFN model.
I always thought it was technically almost identical to the G3 TDI, so I assumed that...
only the VR6 engine has this intake manifold with the bend towards the wheel arch, and the...
'Normal' G3 models, like the Ibiza, have the air intake hose pointing directly rearward.
The front has. Because in this case, it is significantly easier for moisture or water droplets to...
sucked in.

The 'water droplet theory' becomes much more plausible with this, or alternatively, I could also say...
'The extended suction nozzles cannot be explained in relation to the filter housing.'
As Ulf mentioned, with a suction cup design, it would fit flush against the LufiKasten housing.
The filter likely clogs more evenly, which is probably beneficial for its lifespan.
would be due to the filter.

Best regards.
Peter.

The Golfs always draw air from the fender well, at least the G2, G3, and G4 models with "normal" engines. (With the GOMs – Golfs without an engine, such as the smaller gasoline engines – I'm not so sure about that).

It's interesting that the Ibiza 6K doesn't do that, because the 6K GP01 (2001 ASV) has the same naturally aspirated engine as the Golf 4.

I'm not sure whether it's better to evenly clog the filter or just in certain spots. When you integrate the amount of dirt per area, the result should be the same.
It seems absurd, especially since the enclosure itself is nonsensical and only hinders the airflow.

That's why I'm building the enclosure without the guide rails.

m;

I can confirm these assumptions. Without leadership, there is no localized pollution. The filter is uniformly dirty (referring back to my G3 VR6).

OT (just for the sake of defending this spot theory):
My AKN (air intake system) also doesn't have an internal suction nozzle, but rather 2 locations (wheel arch/grille) where it draws air. There, too, no localized contamination can be detected. Only where the air from the grille flows into the box does it hit the air filter (on the side). Here, the filter is locally contaminated and even becomes wet .

"I installed this VR6 Lufika airbox from a Golf; it takes less than 5 minutes. The box is completely empty inside, with no edges or funnels. I just wanted to mention this because there are no pictures available. So, only use it with a pipe leading directly into the airbox; otherwise, it will suck dirt straight from the front into the filter."

Greetings.

Here, you can see more or less (the red lines are meant to highlight this).
the intake manifold for the AFN engine in a 1998 Seat Ibiza.

From the image, it's possible to see that the Lufi's trunk extends into the casing.
emanating from the headlight, which draws warm air away from the cold intake air.
It is supposed to prevent [something], but (here, the lid is missing from the housing).

The incredibly poorly sized (here, it becomes clear why I'm on the...).
Looking for a better solution regarding the air intake system, specifically before and after the air filter box.

Here, you can see the proboscis, which extends inwards and is almost half as long.
like the entire housing. (Probably to prevent the droplets that are drawn in from...)
(To prevent filters from blocking.)

This design seems to generate enough turbulence (probably more detrimental than beneficial).
to cause clogging within the casing, ensuring that the filter becomes evenly soiled.

hi fabu

Did you also use the other type of rubber cover in the Kozflügel, the one with the star-shaped cuts?

I wanted to clear out a gasoline tank this week to supply fuel to a DN70 engine - unfortunately, an accident got in the way. Therefore, I'm out for now .

m;

I left the original (fender) cover from the AHU engine, and it still fits perfectly without any problems.

Greetings

The 'water droplet theory' becomes much more plausible with this, or alternatively, I could also say...
'The extended suction nozzles cannot be explained in relation to the filter housing.'

Best regards.
peter

Hello,
The suction nozzle has acoustic effects. If you change it, it's easy to hear the difference.
I completely removed the intake manifold from our old Golf 1.6 TD, which created a significant increase in the size of the air intake. It had a dull, deep intake noise.

On my Audi, I put in more effort: I reinstalled the intake manifold, after having removed the restriction from it. However, the trunk is about half the length of the standard trunk, which makes the suction noise deeper, but not much louder.

You can compare its mode of operation to a bass reflex port in loudspeakers. Changing the length of the tube will emphasize different frequency spectra.
This is important, for example, in box calculations.

Best regards, Jochen.

The suction nozzle has acoustic effects. If you change this, it is clearly audible and easy to follow.

Hi!
I hadn't even thought of that, as far as I'm concerned.
all intake noises are similar to the smoothing of exhaust pulses caused by the...
Turbochargers must be removed.

Best regards.
Peter.

Hello,
Just open the air filter box and then start the engine...
You'll hear that the turbo here doesn't really provide much noise reduction.

Here's what else comes to mind regarding this topic:
'On my Seat, I modified the intake manifold boot before the airbox, as it acts as an air restrictor. There is no pipe inside the airbox. After doubling the intake diameter in the manifold boot, the intake noise hasn't changed this time.' This is confirmed by everyone who has done a similar conversion in a G4 or its derivatives.

Best regards, Jochen.

FaBu wrote:

I installed this VR6 airbox from a Golf, and it takes less than 5 minutes. The box is completely empty inside, with no edges or funnels. I just wanted to mention this because there are no pictures available.

Images are available (1. (Post on page 2 here), and the 5 minutes are even enough for the installation and removal .

Well, I'm of the opinion that de-throttling the intake passages can definitely make a difference. I have to say that my experience is based on a slightly modified ARL, so it may not be the same for the standard production model.
I'm driving a hybrid charger and having a software tuning done. The results were already good (with the stock filter and airbox), but unfortunately, the boost pressure between 2000-2500 RPM was so high that the turbocharger started to surge. I also started a thread about this here and received a lot of helpful tips. I initially thought it was related to the intake system, but many helpful diesel mechanics had a different opinion (although they could explain their reasoning). Due to my conviction (I'm a bit of a stubborn person), I ended up completely rebuilding the intake system. I now have the intake pipe/hose from an A6 TDI (180 hp), and on top of that, I've installed a BMC airbox (bought cheaply from eBay) that sits directly on the (even shortened) hose.
In conclusion, the supercharger has been removed, and the car now reacts much more responsively to changes in load and pulls significantly better. I honestly didn't expect such a dramatic improvement. Additionally, a hose has been installed on the "inlet side of the box" to my T4 vents in the fender, creating a very short intake path of approximately 60cm (from the T4 vent to the supercharger inlet). I can't explain it, but the responsiveness is incredibly better, it's hard to describe. I believe the turbo's intake process is significantly easier and accelerates better due to the reduced "air mass" in the intake tract, although flow optimization may also play a major role here.