||| Active Autowerke | N52 Green Filter Development Thread |||

[Da_Meister_22]

1Addicts post members,

As most of you know we have dyno tested a few of the most common aftermarket intakes on the market with out any favorable results to say the least. We will be putting into production a drop in filter for the N52 made by Green filter USA. We have been using Green for many years to produce some of the best selling drop in filters for the N55 and M3 market.

Why go green ?

Why are Green High Performance Air Filters important to you? Well, lets take a look at a few key points:

Green High Performance Air Filters are uniquely designed to take full advantage of cottons capabilities.

Unlike multi-layer gauze filters which can fray and release fiber particles into your engine, Green Filter USA uses two layers of tightly-interwoven cotton fabric. The 3 main benefits to woven cotten are the fact its thinner, holds oil better, and is stronger. Since its thinner, it allows better air flow without sacrificing filtration. The cotton holds the oil more evenly, and the medium is much stronger. Unlike gauze, you cannot wear a hole in woven cotton by rubbing it, and there is no way small bits of cotton can rip off since its interlocked with another piece.

Cross weaving one fine, and one medium layer, produces a fabric that is thinner and stronger than other materials and has the ablity to trap dirt up down to 5 microns. The result is better airflow without sacrificing filtration. And because the fabric is so durable, they can be washed and reused over and over, which allows us to give it a lifetime gaurantee.

Green Filter USA filters are coated in steel mesh for extra strength and durability, because of this, Green filters are much more dent resistant.
Other filters use a simple pressure molded injection process to bond the perimeter rubber to the interior components. That method saves manufacturing time, but in the process, a considerable amount of rubber can seep onto the filtering surface. This can restrict airflow as much as 25%.
Green Filter USA uses a time-consuming and costlier 4 step production process which virtually eliminates seepage and maintains maximum airflow through the filter.

Green Filter USA filters offer fully seam welded, powder coated, laser cut steel housing with pre-assembled rubber seals on our intake housings.

Custom molded oversized OEM quality intake tubes with aircraft stainless steel clamps and hardware. Reinforced silicon connectors. Most other filters use chrome as their end cap, which has its aesthetic look but chrome does not last as long as stainless steel, which is why we provide you with polished stainless steel end caps.

Green Filter USA filters come pre-treated with a specially formulated dirt trapping oil. This oil creates a positive magnetic charge, or ionic bond, with the filters stainless steel mesh. The positive charge attracts the negatively charged dust particles entering the filter, causing them to cling to the steel mesh and allowing the cotton to remain clear for maximum airflow.

Economical - A paper filter should be replaced between 4,000 to 5,000 miles or every oil change. The average cost of a paper filter is about $10 to $12. After one year of driving 15,000 miles, at least 3 paper filters are needed. This totals $30 to $35. After one to two years, a Lifetime Green Filter is already paid for. This benefit is for everyone - a daily driver, an older vehicle or someone looking for the best performance.

Hand molded flexible rubber base on filters.

Green Filter USA rubber molds create air tight seals. We also feature trim-able custom fitment tabs on all filters.

Green Filter USA uses deeper air filter pleats which creates 20% more filtration surface.

Green Filter USA mesh is colored green so that even if the filter is dirty, it still appears green.

Race proven gains and technology.

So stay tuned, because I will keep you guys updated as more news become available.

[Pothole]

What kind of gains are you claiming for a stock car as opposed to the race proven gains?

[Da_Meister_22]

Originally Posted by Pothole

What kind of gains are you claiming for a stock car as opposed to the race proven gains?

I personally don't like to "claim" anything without having any tests (dyno runs, charts, etc.) to back it up. Once the filter is developed and properly tested....only then you'll see me claiming

So stay tuned.

[Pothole]

Originally Posted by Manny@ActiveAutowerke

I personally don't like to "claim" anything without having any tests (dyno runs, charts, etc.) to back it up. Once the filter is developed and properly tested....only then you'll see me claiming

So stay tuned.

I will!

Good luck on the development!

[livewire85]

Have you guys dyno tested the injen short ram intake? I've seen some very positive results from their dynos as well as independent dyno runs. There is a member on here who did a dyno run with the injen intake compared to stock and gained an average of 8whp. That's pretty impressive to me.

[Chandon]

Originally Posted by livewire85

Have you guys dyno tested the injen short ram intake? I've seen some very positive results from their dynos as well as independent dyno runs. There is a member on here who did a dyno run with the injen intake compared to stock and gained an average of 8whp. That's pretty impressive to me.

Can confirm the injen shows 0 gains. All it did was make my torque curve go full retard, but maybe because it was almost 40 degrees celcius. I'm still not convinced it offers any gains whatsoever though.

[Iron Man]

These sound nice, but I must disagree with the claim that standard air filers only last 5,000 miles. They should be good for at least three times that, if not longer (maybe even up to 30,000).

[TheSt|G]

As a heads up to AA, most of us who have a stock box are not using the US intake anymore. We are using the euro which has a different filter.

Originally Posted by Iron Man

These sound nice, but I must disagree with the claim that standard air filers only last 5,000 miles. They should be good for at least three times that, if not longer (maybe even up to 30,000).

They are an inspection 1 and 2 item, so every 15k.

[livewire85]

Originally Posted by viciousgook

Can confirm the injen shows 0 gains. All it did was make my torque curve go full retard, but maybe because it was almost 40 degrees celcius. I'm still not convinced it offers any gains whatsoever though.

Wow, why would you do a dyno when it's 105 f outside? @pushkin did several dyno runs for different phases of his project. Shows nice gains for exhaust and intake. Hopefully I get my dyno runs in soon to provide further evidence.

[TheSt|G]

Originally Posted by livewire85

Wow, why would you do a dyno when it's 105 f outside? @pushkin did several dyno runs for different phases of his project. Shows nice gains for exhaust and intake. Hopefully I get my dyno runs in soon to provide further evidence.

Single dyno pull also does not do much to account for heatsoak.

[Da_Meister_22]

Originally Posted by livewire85

Wow, why would you do a dyno when it's 105 f outside? @pushkin did several dyno runs for different phases of his project. Shows nice gains for exhaust and intake. Hopefully I get my dyno runs in soon to provide further evidence.

I used to go through countless threads about these intakes on 5 series forums. They all ended up in the same "loss of power" due to hot air. There are chances that on the first 3 or so Dyno runs with the hood open that you could get a possible gain, but try on a 4th run with the hood closed and a hot engine, I know we've seen it here. On real time conditions (for example Miami) where normal temperature is 88 degrees and higher plus humidity...you'll only be paying to make your car slower. Best solution for our cars are the "drop in" design filters, no doubt.

[TheSt|G]

Originally Posted by Manny@ActiveAutowerke

I used to go through countless threads about these intakes on 5 series forums. They all ended up in the same "loss of power" due to hot air. There are chances that on the first 3 or so Dyno runs with the hood open that you could get a possible gain, but try on a 4th run with the hood closed and a hot engine, I know we've seen it here. On real time conditions (for example Miami) where normal temperature is 88 degrees and higher plus humidity...you'll only be paying to make your car slower. Best solution for our cars are the "drop in" design filters, no doubt.

Complete agreement that 99% of CAI are un-researched/developed POS.

[andrey_gta]

Originally Posted by TheSt|G

As a heads up to AA, most of us who have a stock box are not using the US intake anymore. We are using the euro which has a different filter.



They are an inspection 1 and 2 item, so every 15k.

+1
We want to see Green colored Euro box spec filters. Especially DRY

I think AFE dry Euro spec is very well done. I'd love to have a Green Filter as a back up/ cyclical.

[Solo_M_Tech]

Originally Posted by andrey_gta

+1
We want to see Green colored Euro box spec filters. Especially DRY

I think AFE dry Euro spec is very well done. I'd love to have a Green Filter as a back up/ cyclical.

+1

[Dafttt]

Originally Posted by andrey_gta

+1
We want to see Green colored Euro box spec filters. Especially DRY

I think AFE dry Euro spec is very well done. I'd love to have a Green Filter as a back up/ cyclical.

+3

In for the Euro box filter!

[Chandon]

Originally Posted by livewire85

Wow, why would you do a dyno when it's 105 f outside? @pushkin did several dyno runs for different phases of his project. Shows nice gains for exhaust and intake. Hopefully I get my dyno runs in soon to provide further evidence.

Lol well to be honest with you, we can't really do anything about the hot summer temperatures here. Several runs resulted in 120rwkw compared to a friends bone stock e92 325i which ran 124rwkw.

Originally Posted by TheSt|G

Single dyno pull also does not do much to account for heatsoak.

Dyno'd 5 times with open bonnet and fan, which is why i'm so convinced the intake is all bs lol.

[TheSt|G]

Originally Posted by viciousgook;*****354

Lol well to be honest with you, we can't really do anything about the hot summer temperatures here. Several runs resulted in 120rwkw compared to a friends bone stock e92 325i which ran 124rwkw.

Dyno'd 5 times with open bonnet and fan, which is why i'm so convinced the intake is all bs lol.

Exactly.

[pj.rodriguez]

Originally Posted by TheSt|G

As a heads up to AA, most of us who have a stock box are not using the US intake anymore. We are using the euro which has a different filter.

They are an inspection 1 and 2 item, so every 15k.

I was gonna say the same. Euro filter please!

[Da_Meister_22]

Originally Posted by pj.rodriguez

I was gonna say the same. Euro filter please!

I can chime in...but no promises. lol.

[kobeballer96]

Can't you guys just slap a K&N filter inside the euro box and call it a day? They make good filters

[Solo_M_Tech]

Originally Posted by kobeballer96

Can't you guys just slap a K&N filter inside the euro box and call it a day? They make good filters

Yes you can. I did. But I still want the green filter lol.

[kobeballer96]

Originally Posted by Sinister_1

Yes you can. I did. But I still want the green filter lol.

Lol oh gees, I'm going to slap you when I see you this summer, less then 90 days lmao.