AFE Stage 2 kit for the 3.0si

StigJ
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AFE Stage 2 kit for the 3.0si

Post by StigJ » Tue May 03, 2011 9:21 pm

Bought an AFE Stage 2 (oiled filter) kit from modbargains.com in january and installed it right after I took out the Zed from winter storage.
And now I thought that I could do a little DIY thread for you guys and girls ;)

So first a picture of the OEM filter box
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To remove the top lid you have to loosen the 4 metal clips around.
Then unplug the MAF sensor and loosen the hose clamp on the tube that goes backwards.
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Top lid and OEM filter removed:
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Now you can just pull up the bottom og the filter housing. This one is just fasten with two rubber rings put over two plastic plugs.
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Then you need to remove these two plastic plugs and a round rubber block.
The plastick plugs was a little tricky to remove since I didnt know how they came apart.
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As you can see the plug has two parts. You need to pry the one piece to the side to unlock it. Then you need to twist the whole plug a little to get them out of the hole.

than you need to loosen some more metal clamps.
One for the hose that goes in to the engine:
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Then one a little further back towards the firewall:
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This is for the soundgenerator that is installed on the 3.0si´s.

Another shot of the clamp:
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Then you can remove the biggest part of the tube:
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A shot that showes better where the hose clamps are located:
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Next step is actually not necessary. I wanted to remove the pieces of foam that is located inside the soundgenerator to get a little more sound in to the interior.

Here you need to remove a Torx T25 screw that holds the last piece to the engine:
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Here you can see the last part of the soundgenerator that goes in to the firewall:
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Here is the last part removed:
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loosen the last hose clamp to dismantle the last bit to get to the blocks of foam:
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There is one piece of foam in both ends of the tube:
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Then reinstall the last piece you removed (without the foam). Remember the Torx screw.
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Now for the main pieces.

Gently remove the MAF sensor. Do not touch the little wire in the center of the white plastic. It breaks easily.
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Then you can find this tube in the AFE kit and also find the gasket and two screws the is included in the AFE kit:
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Put the gasket like this on the MAF sensor:
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And install it the correct way on to the tube:
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then you can bring out some more AFE parts.
The lower big shield, a gasket, 4 pcs. screws with washers and the adapter for the filter.
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Then place the tube that you installed the MAF sensor to and line it up like in the picture. remember the gasket between the tube and the shield.
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Align the adapter so it fits nicely to the hole in the shield and the tube:
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Now I got a little excited and forgot to take pictures of how the shield is mounted to the car. :sigh:

There is a rubber tube with the kit that is going between the plastic tube with the MAF sensor and the engine. Mount this to the plastic tube before you put the shield in. Remember to place the metal clamps before installing the kit.You can fasten the one that mounts the plastic with the rubber tube.
Now you can put the whole shield in to the enginebay.

There are some holes in the shield all the way in the bottom that should go over two screws that is welded to the chassis that sticks upwards. You see what I mean when you look down there :) Then you have two screws with nuts that should fasten the shield where the plastic plugs was that held the OEM lower filter housing.
And remember to plug in the MAF sensor.
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Remember to place the rubber tube to the engine side and align the metal clamp in a way that you can reach it and fasten it.
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Then you can take out the air filter and the largest hose clamp that was in the AFE kit.
Just mount the filter to the adapter and fasten it with the clamp.
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As you probably have seen, there is a little dry filter included wit hte AFE kit. This is for the sound generator. Its just there for filtering the air so you dont get any dust in to your cabin.
This is mounted with a hose clampe just as the large filter.
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Finally place the top lid with the nice logo on to the shield and fasten it with the 4 hex bolts that you have left from the kit. I hope you didnt lose them :D

Tadaaaaa!!!
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So now crank up your engine and warm it up before taking a nice drive with high revs :thumsup: And remember to push the SPORT button :happyanim:

Thanks for watching!
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Hellrot '06 BMW Z4 Coupe 3.0si
Instagram: @StigJ77 & @bmwe86driver

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PawnSacrifice
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Re: AFE Stage 2 kit for the 3.0si

Post by PawnSacrifice » Wed May 04, 2011 10:45 pm

Nice, you're on a roll! I now understand why not many make mods for the N52 engines.

How are you enjoying the noise? 8)
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Taz
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Re: AFE Stage 2 kit for the 3.0si

Post by Taz » Thu May 05, 2011 7:16 am

well detailed pics :thumbsup:

StigJ
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Re: AFE Stage 2 kit for the 3.0si

Post by StigJ » Wed May 11, 2011 1:25 pm

Thanks! :oops:
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Hellrot '06 BMW Z4 Coupe 3.0si
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McKoval
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Re: AFE Stage 2 kit for the 3.0si

Post by McKoval » Wed May 11, 2011 7:34 pm

thats one great DIY
do you feel a lack of working sound generator?
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Breadvan_Matt
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Re: AFE Stage 2 kit for the 3.0si

Post by Breadvan_Matt » Thu Jun 02, 2011 9:10 pm

Well done StigJ. Great DIY write up. Very impressed. :thumbsup:
06 Silver Z4 Coupe 3.0i S (Mods to date: Aux in kit, OEM Carbon Rear Diffuser, OEM Carbon Fibre rear spoiler, H&R springs, custom CF front splitters)

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AFE Stage 2 kit for the 3.0si

Post by BTZ461 » Wed Jan 22, 2020 9:29 am

StigJ wrote:
Wed May 11, 2011 1:25 pm
Thanks!
Great install write up. Resurrecting from the past here, do you recall whether there was a performance increase?

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AFE Stage 2 kit for the 3.0si

Post by Woodrow » Wed Jan 22, 2020 10:17 am

The paintwork on your car looks amazing. Would love to see the whole car.

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AFE Stage 2 kit for the 3.0si

Post by Smartbear » Wed Jan 22, 2020 12:20 pm

Not sure what’s happening with the filter fitted to the bulkhead? Looks like that’s displaced the sound generator tube, so not sure why you removed some foam from it if it’s no longer in use? :?
Rob
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ph001
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AFE Stage 2 kit for the 3.0si

Post by ph001 » Wed Jan 22, 2020 1:38 pm

To be fair the OP's thread was almost 10 years ago so probably not around to answer / care!
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Darkangelv2
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AFE Stage 2 kit for the 3.0si

Post by Darkangelv2 » Wed Jan 22, 2020 6:09 pm

Smartbear wrote:
Wed Jan 22, 2020 12:20 pm
Not sure what’s happening with the filter fitted to the bulkhead? Looks like that’s displaced the sound generator tube, so not sure why you removed some foam from it if it’s no longer in use?
Rob
Basically he has removed the sound generator elements shown and put the small filter over the pipe that funnels sound from the engine bay into the bulkhead. It should still serve to pull more sound from directly behind the AFE into the cabin - hence removing the foam. :thumbsup:
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BMW Z4 2006 2.5SI - BBS OEM 216 Wheels - Strut Brace
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BC Racing BR Coilovers - Stainless Exhaust Bypass - AFE Stage 2

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ph001
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AFE Stage 2 kit for the 3.0si

Post by ph001 » Wed Jan 22, 2020 8:02 pm

....but it does omit the resonator which plays a critical role in ‘amplifying’ the engine note. I guess you just get a different characteristic with this method, although I certainly have my doubts about it’s effectiveness. You are also directly porting any fumes etc from the engine bay into the cabin (the original resonator is effectively sealed).
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Darkangelv2
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AFE Stage 2 kit for the 3.0si

Post by Darkangelv2 » Wed Jan 22, 2020 9:07 pm

ph001 wrote:
Wed Jan 22, 2020 8:02 pm
....but it does omit the resonator which plays a critical role in ‘amplifying’ the engine note. I guess you just get a different characteristic with this method, although I certainly have my doubts about it’s effectiveness. You are also directly porting any fumes etc from the engine bay into the cabin (the original resonator is effectively sealed).
With the more ‘open’ design, I wouldn’t think an additional resonator is needed to ‘amplify’.

Isn’t the mini filter is there to take care of any fumes? Not there should be anything nefarious coming from under your bonnet other than the fresh air coming from in front.
BMW Z4 2006 2.5SI - BBS OEM 216 Wheels - Strut Brace
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BC Racing BR Coilovers - Stainless Exhaust Bypass - AFE Stage 2

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AFE Stage 2 kit for the 3.0si

Post by z4pilot » Wed Jan 22, 2020 9:15 pm

ph001 wrote:
Wed Jan 22, 2020 1:38 pm
To be fair the OP's thread was almost 10 years ago so probably not around to answer / care!
He's still very much around - has won the photo comp quite a few times
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AFE Stage 2 kit for the 3.0si

Post by BTZ461 » Thu Jan 23, 2020 3:38 am

Not interested in the sound generator stuff, my comment was directed more to an increase in performance. Even a butt-meter sense would help me here. Anyone else added this air box to a Si?
Thanks for reading
Bill

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