My first spin of my Open element Air Filter project

shnaggs · 01-31-2016, 06:00 PM

Well had some fun today on the lathe. Made a coupling piece out of aluminum to fit in the stock air inlet, that deletes the MAF, and holds a 4" inlet AFE progaurd 7 air filter. Surprisingly it somewhat fits in the bottom portion of the stock air box. Which is nice cause it utilizes the ram tube feed cool air at the filter. At some point I will probably remake some sort of air filter box/shield thing, probably out of carbon. Then depending on how that goes and the space I may have, I might try to make a new air inlet pipe out of carbon.
Only got to drive it around the block, but I was surprised at how little change in noise it was. Once you get the LP spooling though, you can hear it well, but it's not loud at all.
I can only upload one picture at a time for some reason. If someone knows what I'm doing wrong there, please let me know.
Thanks!

shnaggs · 01-31-2016, 06:06 PM

I must be retarded, cause now it won't let me upload any more pics????

shnaggs · 01-31-2016, 06:15 PM

.

shnaggs · 01-31-2016, 06:19 PM

..

tuikku · 01-31-2016, 06:25 PM

.
That upper end is not important, stock air filter is good at least 600hp.
The problem is in the other side, its diameter is only ~40mm.
It is quite easy to get it => 63mm (2,5")

shnaggs · 01-31-2016, 06:42 PM

Quote:

Originally Posted by tuikku

.
That upper end is not important, stock air filter is good at least 600hp.
The problem is in the other side, its diameter is only ~40mm.
It is quite easy to get it => 63mm (2,5")

I'm sure you are correct, but what about the huge step on the inlet of the compressor housing?

If we were to do what you have done, by puting a hose on the outside if the housing. it appears that that huge step being exposed now to incoming air would provide a lot of turbulence, and would result in not so good air flow?

tuikku · 01-31-2016, 06:45 PM

.
Hi
You are right, but.
That is very easy to fix.
Make a suitable "ring" there.

shnaggs · 01-31-2016, 06:51 PM

Quote:

Originally Posted by tuikku

.
Hi
You are right, but.
That is very easy to fix.
Make a suitable "ring" there.

now we are on the same page, I was actually looking at that yesterday.

DWR · 01-31-2016, 07:54 PM

Quote:

Originally Posted by tuikku

.
That upper end is not important, stock air filter is good at least 600hp.

It will work, but it is a little small for 600hp.
More importantant is the passage into the box.
Also, the MAF is a bigger restriction than the air filter.

So, shnaggs is working on the right stuff.

Built4Sin · 02-01-2016, 07:17 AM

Quote:

Originally Posted by shnaggs

now we are on the same page, I was actually looking at that yesterday.

Like one of these? (From the 335i)

http://www.e90post.com/forums/showthread.php?t=1220307

shnaggs · 02-01-2016, 08:39 AM

Quote:

Originally Posted by Built4Sin

Like one of these? (From the 335i)

http://www.e90post.com/forums/showthread.php?t=1220307

Kinda, but on the 'inlet' to the compressor housing, not the outlet, like in your pics.

Nadir Point · 02-01-2016, 10:00 AM

Intake is definitely restricted on these cars. I just wish there was a more practical way to improve it. I run a filter minder in the airbox and it pulls down over halfway on a new filter.

TDIwyse · 02-01-2016, 10:14 AM

Quote:

Originally Posted by UberArchetype

Intake is definitely restricted on these cars. I just wish there was a more practical way to improve it. I run a filter minder in the airbox and it pulls down over halfway on a new filter.

I saw this as well with my filter minder. You might find this thread interesting. I was able to modify the stock airbox intake bottleneck issue and fix this. I show several progressive steps to getting there...

http://www.e90post.com/forums/showthread.php?t=1179619

Bob, I saw very similar power results with removing the intake restriction. Several stepwise measurements and progressive power improvements shown here (from the same thread above):

http://www.e90post.com/forums/showpo...4&postcount=33

shnaggs · 02-01-2016, 10:19 AM

Quote:

Originally Posted by Bob@BPC

BTW some more data for you guys on the subject of an open air filter if it make more power or not...

Heres a dyno graph that you many enjoy

MODS ABC Delete, BPC Stage II+ tune, AEM meth injection

Blue Line is stock air box & stock air filter
Red Line The stock air box removed and no filter.
(I have a dyno video I will upload soon to the youtube.

Hey that looks nice! Thanks for sharing.

looks like my efforts might not be all for not!

Maybe i'll have to draw up a program, to run a few in the cnc lathe

iaknown · 02-01-2016, 10:59 AM

Quote:

Originally Posted by Bob@BPC

BTW some more data for you guys on the subject of an open air filter if it make more power or not...

Heres a dyno graph that you many enjoy

MODS ABC Delete, BPC Stage II+ tune, AEM meth injection

Blue Line is stock air box & stock air filter
Red Line The stock air box removed and no filter.
(I have a dyno video I will upload soon to the youtube.

Certainly sounds delightful

Surprising how much power it picked up!

shnaggs · 02-01-2016, 11:50 AM

Quote:

Originally Posted by Bob@BPC

Hey no problem, btw you should do one with a maf housing for people that are not tuned or still have the egr in place

Good point

petey_highboost · 02-01-2016, 12:06 PM

Quote:

Originally Posted by Bob@BPC

BTW some more data for you guys on the subject of an open air filter if it make more power or not...

Heres a dyno graph that you many enjoy

MODS ABC Delete, BPC Stage II+ tune, AEM meth injection

Blue Line is stock air box & stock air filter
Red Line The stock air box removed and no filter.
(I have a dyno video I will upload soon to the youtube.

Still with the maf plugged in? As you know my car didn't like the maf unplugged LOL

TDIwyse · 02-01-2016, 12:31 PM

Quote:

Originally Posted by petey_highboost

Still with the maf plugged in? As you know my car didn't like the maf unplugged LOL

Interesting. Is the MAF delete approach to keep the MAF connector plugged in, but the unit is pulled out of the intake tract? Or can the MAF unit be completely disconnected and removed?

petey_highboost · 02-01-2016, 01:06 PM

Quote:

Originally Posted by TDIwyse

Quote:

Originally Posted by petey_highboost

Still with the maf plugged in? As you know my car didn't like the maf unplugged LOL

Interesting. Is the MAF delete approach to keep the MAF connector plugged in, but the unit is pulled out of the intake tract? Or can the MAF unit be completely disconnected and removed?

Bob asked when we had the car on the dyno to try it with the maf plugged and unplugged.. I'm sure he will chime in in regards to this

shnaggs · 02-01-2016, 01:22 PM

Quote:

Originally Posted by Bob@BPC

Yeah, this is still with the maf plugged in, for your car, there's a map that needs to adjusted in the tune.

Bob,

I was under the impression that your tunes eliminated the MAF?

That's why I made the piece. In driving my car after this mod, I left the MAF unplugged, and did not notice any running issues or CEL. But then again, I only drove it around the block and didn't get the Floor it at all.

TDIwyse · 02-01-2016, 01:33 PM

Quote:

Originally Posted by Bob@BPC

It does, but, in petey's case, i did a custom tune for him and left the maf adjustment out.

Nice. Thanks for the clarification.

shnaggs · 02-01-2016, 01:38 PM

Great, Thanks!

01-31-2016, 06:00 PM	#1
shnaggs Lieutenant 79 Rep 459 Posts Drives: TDi Join Date: Jan 2015 Location: NE, Pa iTrader: (1)	My first spin of my Open element Air Filter project Well had some fun today on the lathe. Made a coupling piece out of aluminum to fit in the stock air inlet, that deletes the MAF, and holds a 4" inlet AFE progaurd 7 air filter. Surprisingly it somewhat fits in the bottom portion of the stock air box. Which is nice cause it utilizes the ram tube feed cool air at the filter. At some point I will probably remake some sort of air filter box/shield thing, probably out of carbon. Then depending on how that goes and the space I may have, I might try to make a new air inlet pipe out of carbon. Only got to drive it around the block, but I was surprised at how little change in noise it was. Once you get the LP spooling though, you can hear it well, but it's not loud at all. I can only upload one picture at a time for some reason. If someone knows what I'm doing wrong there, please let me know. Thanks! Attached Images
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01-31-2016, 06:06 PM	#2
shnaggs Lieutenant 79 Rep 459 Posts Drives: TDi Join Date: Jan 2015 Location: NE, Pa iTrader: (1)	I must be retarded, cause now it won't let me upload any more pics????
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01-31-2016, 06:25 PM	#5
tuikku Private First Class 55 Rep 153 Posts Drives: BMW E92 335d Join Date: Jan 2016 Location: Finland iTrader: (0)	. That upper end is not important, stock air filter is good at least 600hp. The problem is in the other side, its diameter is only ~40mm. It is quite easy to get it => 63mm (2,5")
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01-31-2016, 06:45 PM	#7
tuikku Private First Class 55 Rep 153 Posts Drives: BMW E92 335d Join Date: Jan 2016 Location: Finland iTrader: (0)	. Hi You are right, but. That is very easy to fix. Make a suitable "ring" there.
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02-01-2016, 10:00 AM	#12
Nadir Point Lieutenant 110 Rep 596 Posts Drives: Diesel Join Date: Dec 2015 Location: CO iTrader: (0)	Intake is definitely restricted on these cars. I just wish there was a more practical way to improve it. I run a filter minder in the airbox and it pulls down over halfway on a new filter.
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02-01-2016, 01:38 PM	#22
shnaggs Lieutenant 79 Rep 459 Posts Drives: TDi Join Date: Jan 2015 Location: NE, Pa iTrader: (1)	Great, Thanks!
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