Ansaugwege entdrosseln beim Golf 3 - Tip | Posts 48+

Zak1976 wrote:

Due to my conviction (I'm just stubborn), I completely rebuilt the intake passages. I now have the intake pipe/hose from an A6 TDI (180 hp), and on top of that, a BMC AIRBOX (cheaply bought from eBay), which sits directly on the (even shortened) hose. The conclusion of all the modification work is that the pump is gone, the car reacts much more spontaneously to load changes, and pulls significantly better. . .

Hmm, it would be interesting to compare the entire suction path from the intake to the compressor inlet (before and after). Have the significant bottlenecks that previously caused pressure losses now been eliminated?

Hello Ulf,
I was almost certain that you would also have something to say about it.
Okay, so the diameter is larger than the stock intake, now consistently 80mm, and the hose from the airbox to the T4 fitting is even 100mm. However, I believe the significantly improved performance comes from the more streamlined airflow path that the air now has to the compressor inlet, and the better supply of cold air. I have to mention that my original airbox was open at the bottom because the engine is in a Golf 3, and the left engine mount is in the way, so driving with the hood open all the time isn't ideal. In addition, the intake path is much shorter. "There's also a certain mass 'x' in the intake pipes that needs to be accelerated initially. If this mass is smaller due to the shorter pipes, it allows for faster response and, at least, makes the turbocharger's intake work easier. I don't have any obstacles like a mass airflow sensor (MAF) anymore anyway."
I think this is also because, due to the increased performance and the resulting increased air demand, the effect is greater in my case than in a standard vehicle. In any case, this should not be taken as a recommendation to immediately purchase a BMC airbox.

Hello.

I modified my Airbox for just €1.09.

I bought a 70mm diameter bow with an 87° angle from OBI.
Trunk clipped.
The receiving collar is approximately 2mm smaller than the 70mm arch.
Cut 3.5 cm off the arc.
Cut two 2cm sections from an old bicycle inner tube to create two tube rings.
Slide the two hose clamps onto the fitting, place the cut section over it and secure it with an 80mm hose clamp, align everything within the wheel well, and then tighten the clamp.
It's quite tight, but it works and fits for me.
The whole thing is just cost-effective.
The sound of the air intake is almost the same.
The engine runs better when revved from lower RPMs and reaches its maximum speed faster.

Thank you and goodbye.
Jarek.

hi jarek

I'm seeing so many pictures, you wouldn't believe it .

Upload for everyone here: /viewforum.php?f=40

m;