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CSL Airbox

yep - just found a photo that shows the fitment which helps me figure out the 3 sources of air to the OE CSL airbox which I am trying to replicate as closely as possible

CSL Bumper - snorkel
Behind CSL Bumper - underside of airbox before filter
Open end when flaps open

Those 3 combined are much greater than the existing Z4M inlet, hence my desire to replicate as closely as possible.
 
You'll get more than enough air into the airbox using the standard airbox feed alone, the lower feed is pointless in my opinion.
 
Justino said:
at the suction tube utlimately connect
Click to expand...

The suction tube was cut. in the M3 that tube bends 90deg towards the side of the car, where a flexible hose connects to it, and then the flexible hose loops around the other suction tube that connects to the CSL OEM Flap assembly (google it, and you will see).

In the Z4M there is no space for the suction tube that connects to the S pipe to pass over the other side of the frame rail as you have the oil cooler lines and steering pump hoses, so it was cut to point straight down. I am sure I could get a flexible hose to squeeze and route through to the air brake cooling ducts side, and if modified, made that a cold air feed from the outside, but that is too much faff for what it is.

Those two pipes are still available, but the OE flex hose is not, but an aftermarket 60mm one would do.
 
Justino said:
set up uses the other 3 parts show
Click to expand...

Only two out of the four. the other pipe goes to the snorkel, which I believe does not package on the Z4M. The Karb snorkel was cut so it could install to the car. The two pipes I have are just to not suck hot air right the side of the engine, but a bit lower, not sure if that is better or not, that is how it is though, and I assume once the car is moving, all that area is "cool".
 
Martyn said:
You'll get more than enough air into the airbox using the standard airbox feed alone, the lower feed is pointless in my opinion.
Click to expand...

For the sake of 2 pipes, I will give it a go connecting to the lower feed - can’t hurt.

Did you have any thoughts on printing another mouth piece or sharing the file so I could get one printed? Happy to pay of course
 
TomK said:
For interest perhaps here's how the goeke fits. Fwiw they have a pretty good reputation for engineering this stuff properly. The inlet track length and all sorts of other things well beyond my understanding are important in the design on any variation from the original / installation.
DSC_0019.JPG
Click to expand...

This isn’t the spot where the original airbox gets the air from (one behind the right gril). Where is the inlet located in this case? Perhaps I missed it here.
 
RvsBmw said:
TomK said:
For interest perhaps here's how the goeke fits. Fwiw they have a pretty good reputation for engineering this stuff properly. The inlet track length and all sorts of other things well beyond my understanding are important in the design on any variation from the original / installation.
DSC_0019.JPG
Click to expand...

This isn’t the spot where the original airbox gets the air from (one behind the right gril). Where is the inlet located in this case? Perhaps I missed it here.
Click to expand...

It is the original location for a z4 (not e46 csl). ?
 
Sorry guys, I am still prevaricating!

I've pretty much decided I want the quality the Karbonius model offers. I would also prefer an oe looking set up, eg with the detachable snorkel but don't like the compromise of hacking the expensive Karbonius snorkel to make it fit.

My ideal would be to have a detachable mouth piece/snorkel that is just a bell mouth - Martyn 3d printed one for his, but so far I've not been able to tempt him to 3d print another.

The alternative is the Karbonius race box which is one piece box/snorkel. Its cheaper as no separate snorkel is required. Has anyone fitted one of these, I am trying to work out if the opening lines up at all with the Z4m air intake in the grille area, and if any other mods are required?

cheers
 
What is the best mapping for a carbon airbox, I’ve seen lots of people getting csl engine map flashed and others saying just get alpha n, thanks
 
No CSL / MAP sensor option for the Z4M/MSS70 unfortunately. AlphaN is your option and it works perfectly well on the MSS70.
 
The only karbonius race box I’ve seen fitted is in the thread below.

https://forums.m3cutters.co.uk/thr...s-performance-map-review.255956/#post-3459563

Looks similar to the evolve box in the way the ‘snorkel’ points down. As for a bell mouth, I wonder if there are any universal gaskets or trim pieces that have a suitable section that could be placed on to the cut edge of the snorkel. Kit car and classic car parts sites often have this kind of thing.
 
InterlagosMC said:
What is the best mapping for a carbon airbox, I’ve seen lots of people getting csl engine map flashed and others saying just get alpha n, thanks
Click to expand...

I have this, best of both worlds.

If paired with an eventuri the noise is the same

DE5086BA-36F0-4D63-B0F0-8F0375F0A986.jpeg

3D576C25-CE2C-4C0F-8A05-ED277A0CD844.jpeg
 
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