Turner Motorsport CSL Airbox

[jbfrancis3]

Do you have a view of the other half?

[heinzboehmer]

Do you have a view of the other half?

That foam tape on the unfiltered section was not put on there by Karbonius. It's normally just bare carbon fiber. I added it because my airbox was rattling a bit.

[Thonas]

that looks a lot more stout. I also have not heard anyone have similar issues. thanks for posting

[Tbonem3]

Thoughts & prayers for all TMS box owners

[LSBNick]

That looks a MILLION times better than TMS. Wow, I can already tell the reinforcement there is extremely strong.

[LSBNick]

That foam tape on the unfiltered section was not put on there by Karbonius. It's normally just bare carbon fiber. I added it because my airbox was rattling a bit.

What is the extra funnel for? Is it just an open section?

[Tbonem3]

OE spec ducting no? Gotta love Karbonius

[C///M]

What is the extra funnel for? Is it just an open section?

Thats the inlet that sits behind the OE flap when closed.

There are several ducting parts required to use that port in CSL fashion.

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[heinzboehmer]

What is the extra funnel for? Is it just an open section?

The OE box was only ever meant to be used on real CSLs, so cars with the CSL front bumper, flap and associated ducting. At low rpms, the flap is closed, so that extra hole at the bottom is used to get air into the engine. At higher rpms, the flap opens to allow for more airflow through the main opening.

Here's how it's all ducted:


A bunch more pics of the ducting here: https://nam3forum.com/forums/forum/m...5610#post15610

Karbonius box is as close of a replica to OE as possible, so it's got that hole too.

[elbert]

Anyone have any ideas how to fix this? The pins are fine but the carbon fiber was very thin at the holes and after driving they seem to have pulled through/broken the carbon fiber. Thanks

I think you could try to repair this if Turner doesn't give you a replacement.
I would probably use some epoxy resin or cyanoacrylate to bond a short piece of aluminum tube (or maybe even a washer) into place. Then reinforce it by laying up some additional carbon fiber sheet or fiberglass mat.
The metal tube might end up causing the pins to break, depending on what they used for the pin material. When that happens, bond in a metal screw or locator pin in place of the original pin.
It probably won't look pretty, but it's all underneath so this shouldn't matter.
You might want to practice first if you haven't done this type of repair before.
Disclaimer: I don't have one of these intakes, so how the pieces fit together might affect where you can put material, and thus how well this idea might work.

[LSBNick]

The OE box was only ever meant to be used on real CSLs, so cars with the CSL front bumper, flap and associated ducting. At low rpms, the flap is closed, so that extra hole at the bottom is used to get air into the engine. At higher rpms, the flap opens to allow for more airflow through the main opening.

Here's how it's all ducted:


A bunch more pics of the ducting here: https://nam3forum.com/forums/forum/m...5610#post15610

Karbonius box is as close of a replica to OE as possible, so it's got that hole too.

Is the ducting necessary to run the Karb box? Don’t have a csl front end, and not planning on running the flap personally.

[heinzboehmer]

Is the ducting necessary to run the Karb box? Don’t have a csl front end, and not planning on running the flap personally.

Without a flap there's no need for it, you can even cap off the bottom port. With a flap you'd need to at least leave the port uncapped.

I personally don't run a flap and just left it like it came from Karbonius, although I should probably cap the port off cause hot air and all that.

[Cubieman]

Correct me if I'm wrong, but couldn't one still run the factory CSL "back hole" ducting on a US bumper?

It looks as if it just kind of hangs out in the belly pan anyways, I'm sure it affixes itself to something that the US version doesn't have but in a likelihood one could make that ducting work on the US bumper as well.

The hole on the CSL bumper is for the snorkel and with use of the factory US duct comming up off the brake duct you can more or less replicate the cold air flow into the main intake tract of the Karbonious airbox.

For a period of time I had a section of 3" racing brake duct that attached to the brake duct inlet and ran to the Karbonious back hole. I removed it as it made disassembly a bit more involved but I am planning on putting it back together as it does a great job of forcing more cold air into the airbox in general.

jbfrancis3 made a great post on how to do just that and I followed his instructions.

https://nam3forum.com/forums/forum/main-forum/e46-2001-2006/42627-csl-airbox-ducting-with-standard-m3-bumper

[Thonas]

I think you could try to repair this if Turner doesn't give you a replacement.
I would probably use some epoxy resin or cyanoacrylate to bond a short piece of aluminum tube (or maybe even a washer) into place. Then reinforce it by laying up some additional carbon fiber sheet or fiberglass mat.
The metal tube might end up causing the pins to break, depending on what they used for the pin material. When that happens, bond in a metal screw or locator pin in place of the original pin.
It probably won't look pretty, but it's all underneath so this shouldn't matter.
You might want to practice first if you haven't done this type of repair before.
Disclaimer: I don't have one of these intakes, so how the pieces fit together might affect where you can put material, and thus how well this idea might work.

I am working on a fix using stainless steel washers and hi temp epoxy. I am wondering if I am putting lipstick on a pig!

The questions I am pondering now are:

- if fixed is this a good air box solution?
- Are there any other performance benefits to dumping this box and purchasing a Karboiuns box? (I think this should have been the first choice)

[Arith2]

My rear bolt vibrated out and my bottom pins are now missing. Still not mad for the price I paid