Stock Airbox with a BMS Drop-in vs an Open Airbox

Julian2485 · 08-29-2016, 10:50 PM

Quote:

Originally Posted by NA55

Quote:

Originally Posted by Julian2485

So stock airbox is fine ? We pretty much need an upgraded air snorkel. Isn't the z4 snorkel bigger ? Do you think we could use that ? Do you have pics of your modified airbox for us to see ?

Here's hole I cut..

[IMG]http://www.n54tech.com/forums/attach...1&d=1472525196[/IMG]

Nice thank you. So I guess that is comparable to the Dinan intake just no extra filter lol

NA55 · 08-29-2016, 11:02 PM

Quote:

Originally Posted by Julian2485

Nice thank you. So I guess that is comparable to the Dinan intake just no extra filter lol

The air being ingested is still filtered by the k&n in stock location.. The volume below the filter is small and the snorkel is not sufficient, so the cut allows more air to be drawn in.. The Dinan increases the filtered surface area by adding a snorkel and filter to the already filtered area of the airbox..

OffensiveDriver · 08-29-2016, 11:45 PM

Quote:

Originally Posted by NA55

Here's the modified airbox..

I've done a bit of research over the past year on N54 intakes and never seen this method of a hogged out stock airbox before. Anyone else have success with this ?

Seems like the cover is a significant restriction point as mentioned here.

I have an extra airbox and plan to do a Mr5 when I have some time before I pull the trigger on turbos.

OffensiveDriver · 09-01-2016, 10:34 AM

Quote:

Originally Posted by OffensiveDriver

I've done a bit of research over the past year on N54 intakes and never seen this method of a hogged out stock airbox before. Anyone else have success with this ?

Seems like the cover is a significant restriction point as mentioned here.

I have an extra airbox and plan to do a Mr5 when I have some time before I pull the trigger on turbos.

Lol. I now see what you've done there. The hole is drawing hot air next to the intake side of the engine.

BQTuning · 09-01-2016, 12:59 PM

Quote:

Originally Posted by NA55

Here's the modified airbox..

Air flow vacuum is still being restricted by the crevice between the filter housing partition and the cover. All your doing is adding hot air making things worse

On the E89 Z4 BMW made a "taller" cover to allow more airflow through the crevice as they knew where the restriction was

General N54 vs E89 Z4 Intake box cover

vs the E89 Z4

E92 420 · 09-01-2016, 01:02 PM

So does the Z4 lid fit the rest of the n54 range????

Sgop335 · 09-01-2016, 01:14 PM

Quote:

Originally Posted by ********

On the E89 Z4 BMW made a "taller" cover to allow more airflow through the crevice as they knew where the restriction was

General N54 vs E89 Z4 Intake box cover

Thanks! thats what i said earlier...

Quote:

Originally Posted by Sgop335

...

The stock box needs more volume above the filter to be less restrictive.

LMB335IS · 09-01-2016, 01:16 PM

Quote:

Originally Posted by E92 420

So does the Z4 lid fit the rest of the n54 range????

It probably does. It's more of a hood clearance issue.

BQTuning · 09-01-2016, 01:18 PM

Quote:

Originally Posted by E92 420

So does the Z4 lid fit the rest of the n54 range????

Yes, the box is "identically" the same making the covers interchangeable

LMB335IS · 09-01-2016, 01:24 PM

Hmm, the lid doesn't seem to be available as a separate piece though. It's the whole intake assembly or nothing.

BQTuning · 09-01-2016, 01:32 PM

Quote:

Originally Posted by LMB335IS

Hmm, the lid doesn't seem to be available as a separate piece though. It's the whole intake assembly or nothing.

Correct, it is only available as a whole piece only with a separate part number

Julian2485 · 09-01-2016, 02:23 PM

Time to find a junk yard with a z4 lol

N54CoupeHP · 09-17-2016, 11:31 PM

Quote:

Originally Posted by ********

The factory intake box itself restricts airflow "vacuum" before the down flow to the inlets. The factory setup sucks air in through the snorkel from the front of the car then it has to travel UP through the filter and over a "restricted space" between the filter and the cover that is about a half inch gap for air to be sucked through is like trying to breath through a coffee straw.

Removing the cover bypasses all of this, so everyone would think ok time for a DCI.

So I decided to seal up an aFe Stage 2 Elite CAI, which is now superseded by the aFe Magnum GT (100% sealed), that has better airflow, and I ran before and after dyno results. I gained 13 whp and 17 wtq more over the factory box with a K&N drop in filter. To make it even more interesting I went back to the dyno with unfavorable weather conditions

Stock Turbos like colder air.

What intake(s) are the best in your opinion? I'm in the market for an intake but not sure which direction to go.

Julian2485 · 09-18-2016, 12:07 AM

Quote:

Originally Posted by N54CoupeHP

Quote:

Originally Posted by ********

The factory intake box itself restricts airflow "vacuum" before the down flow to the inlets. The factory setup sucks air in through the snorkel from the front of the car then it has to travel UP through the filter and over a "restricted space" between the filter and the cover that is about a half inch gap for air to be sucked through is like trying to breath through a coffee straw.

Removing the cover bypasses all of this, so everyone would think ok time for a DCI.

So I decided to seal up an aFe Stage 2 Elite CAI, which is now superseded by the aFe Magnum GT (100% sealed), that has better airflow, and I ran before and after dyno results. I gained 13 whp and 17 wtq more over the factory box with a K&N drop in filter. To make it even more interesting I went back to the dyno with unfavorable weather conditions

Stock Turbos like colder air.

What intake(s) are the best in your opinion? I'm in the market for an intake but not sure which direction to go.

He's probably going to say afe magnum gt or Ecstuning intake lol

Gohan335i7 · 09-18-2016, 01:12 PM

Injen is great.. That's what I have currently... Everyone has their own preferences but for me the Injen is perfect ,& sounds amazing.

cristy7610 · 09-19-2016, 02:43 PM

I already start to search for a Z4 intake.

Julian2485 · 09-19-2016, 03:33 PM

Quote:

Originally Posted by cristy7610

I already start to search for a Z4 intake.

Any luck finding one ? Anyone has the part number for z4 intake box ?

WedgePerformance · 09-19-2016, 07:02 PM

Found a few Z4 35is air boxes on car-part.com and they range from $135 to $275. Not sure if it would be worth buying not knowing if it would actually add any value without a dyno testing.

Julian2485 · 09-19-2016, 07:47 PM

Quote:

Originally Posted by WedgePerformance

Found a few Z4 35is air boxes on car-part.com and they range from $135 to $275. Not sure if it would be worth buying not knowing if it would actually add any value without a dyno testing.

Would you happen to have the part number. Found it 13717582927 z4 35is

N54CoupeHP · 09-19-2016, 11:56 PM

Quote:

Originally Posted by Julian2485

He's probably going to say afe magnum gt or Ecstuning intake lol

Probably haha

Quote:

Originally Posted by Gohan335i7

Injen is great.. That's what I have currently... Everyone has their own preferences but for me the Injen is perfect ,& sounds amazing.

I had the Injen cold are intake but it does not fit in my 335is.

Julian2485 · 09-20-2016, 12:00 AM

Quote:

Originally Posted by N54CoupeHP

Quote:

Originally Posted by Julian2485

He's probably going to say afe magnum gt or Ecstuning intake lol

Probably haha

Quote:

Originally Posted by Gohan335i7

Injen is great.. That's what I have currently... Everyone has their own preferences but for me the Injen is perfect ,& sounds amazing.

I had the Injen cold are intake but it does not fit in my 335is.

Personally I would get the Ecstuning but it's to damn expensive for an intake

BQTuning · 09-20-2016, 12:32 AM

Quote:

Originally Posted by Julian2485

Any luck finding one ? Anyone has the part number for z4 intake box ?

13717582927

Not worth it............

What I would do is this: Remove the filter partition

This will open up the area to fit a dual flange filter. You just need to fabricate your own connection piping

09-01-2016, 01:02 PM	#28
E92 420 Second Lieutenant 49 Rep 253 Posts Drives: 2006 Auto e92 335i Join Date: Dec 2014 Location: Norfolk iTrader: (1)	So does the Z4 lid fit the rest of the n54 range???? __________________ UK V8bait Tuned Built motor FBO 335i
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09-01-2016, 01:24 PM	#32
LMB335IS Sua Sponte 1311 Rep 2,857 Posts Drives: 2013 LMB 335is Join Date: May 2008 Location: FOB FL iTrader: (21) Garage List 2013 BMW 335is [8.84]	Hmm, the lid doesn't seem to be available as a separate piece though. It's the whole intake assembly or nothing. __________________ 335is/DCT-M3 GTS software-M3 drivetrain-M3 GWS-KOMBI-DSC-SZL/MHD/BQ Tuning IG@ClustersandCoding
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09-01-2016, 02:23 PM	#34
Julian2485 Major 113 Rep 1,340 Posts Drives: Black lci e90 335 xdrive Join Date: Sep 2013 Location: New york iTrader: (1)	Time to find a junk yard with a z4 lol
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09-18-2016, 01:12 PM	#37
Gohan335i7 Captain 312 Rep 766 Posts Drives: 335i Join Date: Nov 2015 Location: Florida iTrader: (0) Garage List 2010 335i [10.00]	Injen is great.. That's what I have currently... Everyone has their own preferences but for me the Injen is perfect ,& sounds amazing.
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09-19-2016, 02:43 PM	#38
cristy7610 Private First Class 39 Rep 125 Posts Drives: BMW E92 335I Join Date: Mar 2012 Location: constanta iTrader: (0)	I already start to search for a Z4 intake.
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09-19-2016, 07:02 PM	#40
WedgePerformance BimmerPost Supporting Vendor 1342 Rep 1,701 Posts Drives: Slot Machines.. Keep Taking $ Join Date: Oct 2013 Location: Portland, OR iTrader: (0) Garage List 2007 BMW 335i Sport [9.67]	Found a few Z4 35is air boxes on car-part.com and they range from $135 to $275. Not sure if it would be worth buying not knowing if it would actually add any value without a dyno testing.
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