aFe POWER 54-31918-B Magnum FORCE Stage-2 Intake System Cover

JETmn · 04-23-2017, 09:14 PM

Quote:

Originally Posted by EB89

No they do nothing.

They are purely aesthetic only.

Anyone who says differently is wrong.

The only thing it does it while stopped it helps to bring in cooler air as the intake is not right next to the radiator. That is it.

Xer0449 · 04-24-2017, 03:25 PM

Quote:

Originally Posted by JETmn

The only thing it does it while stopped it helps to bring in cooler air as the intake is not right next to the radiator. That is it.

I see the argument here, but if i'm going to be pulling in as much air as possible, wouldn't you rather it didn't have to pass through the hot engine bay that's acting as a heating element before it hits my intake filter?

Why not spend a few bucks and use the factory provided plenum?

JETmn · 04-25-2017, 07:30 AM

Quote:

Originally Posted by Xer0449

I see the argument here, but if i'm going to be pulling in as much air as possible, wouldn't you rather it didn't have to pass through the hot engine bay that's acting as a heating element before it hits my intake filter?

Why not spend a few bucks and use the factory provided plenum?

The conversation moved to the scoops you can add to the front of the factory snorkel, we aren't talking about the cover any more.

Xer0449 · 04-25-2017, 12:50 PM

Quote:

Originally Posted by JETmn

The conversation moved to the scoops you can add to the front of the factory snorkel, we aren't talking about the cover any more.

tl;dr: Cover your intake filter and use the stock plenum. Intake scoops don't do shit.

Xer0449 · 05-01-2017, 01:15 PM

For the curious, here's how it looks over the BMS intake/filter:
(like doody)

Supacat · 05-26-2017, 11:35 AM

just sharing but If anyone still wants one I just picked it up on sale from Bavauto for $54!

https://www.bavauto.com/catalogsearc...?q=+54-31918-B

OTN55 · 05-27-2017, 05:33 PM

Quote:

Originally Posted by Xer0449

For the curious, here's how it looks over the BMS intake/filter:
(like doody)

i bet it performs better with the cover though! i just paid 100 gbp for mine ?

Xer0449 · 05-31-2017, 03:13 PM

I think mine was $80 off Amazon

fisc0h · 06-01-2017, 01:35 PM

Quote:

Originally Posted by ANMVQ

So was at the dyno Friday and with the cover over the MBS intake I made 405 WTRQ and with out the cover it a only made 382 WTRQ, WHP was about the same 285

This is amazing! Thanks for testing and sharing

OTN55 · 06-01-2017, 05:05 PM

Quote:

Originally Posted by Xer0449

For the curious, here's how it looks over the BMS intake/filter:
(like doody)

does it fit ok on the bms intake?

Xer0449 · 06-05-2017, 12:52 AM

Quote:

Originally Posted by OTN55

does it fit ok on the bms intake?

I think there was only one stock clip that couldn't go on, but it's still way better than nothing.

ANMVQ · 06-05-2017, 11:28 AM

Quote:

Originally Posted by OTN55

does it fit ok on the bms intake?

Yes mine fit over the BMS intake fine

ANMVQ · 06-05-2017, 11:29 AM

Quote:

Originally Posted by fisc0h

This is amazing! Thanks for testing and sharing

No problem at all, was hopping it didn't make such a difference tho

fisc0h · 06-05-2017, 11:47 AM

Quote:

Originally Posted by ANMVQ

No problem at all, was hopping it didn't make such a difference tho

haha yeah me too, as i definitely prefer the sounds without it on

OTN55 · 06-05-2017, 12:16 PM

Quote:

Originally Posted by fisc0h

Quote:

Originally Posted by ANMVQ

No problem at all, was hopping it didn't make such a difference tho

haha yeah me too, as i definitely prefer the sounds without it on

is it as quiet as stock?

weehe126 · 06-06-2017, 08:03 AM

Quote:

Originally Posted by ANMVQ

So was at the dyno Friday and with the cover over the MBS intake I made 405 WTRQ and with out the cover it a only made 382 WTRQ, WHP was about the same 285

Could you post pics of the graphs?

ANMVQ · 06-06-2017, 02:36 PM

Quote:

Originally Posted by OTN55

is it as quiet as stock?

Its a "hair over stock not much.

ANMVQ · 06-06-2017, 02:41 PM

Quote:

Originally Posted by weehe126

Could you post pics of the graphs?

Write up is here and dyno compare is here. Blue/ purple lines are with the intake cover on

bbnks2 · 06-06-2017, 09:50 PM

Quote:

Originally Posted by ANMVQ

Write up is here and dyno compare is here. Blue/ purple lines are with the intake cover on

Amazing how the "hardcore tuners" in n5x enthusiasts Facebook group will rip you apart for trying to explain that sucking in hot engine bay air is bad. Having an intercooler doesn't mean there isnt a benefit to keeping pre-turbo intake temps as low as possible. Appreciate the data for sure! You get better results charging cooler denser air than you do charging even a few degree warmer engine bay air with open element filters. Its a pretty damn simple concept people don't seem to understand...

"but bms released data showing gains" yeah no shit and they'd be even higher if the filters were sealed away from engine bay heat... the filter is the restriction not the box.

weehe126 · 06-07-2017, 09:13 AM

No, the box is 100% the restriction. There was an entire thread with flow testing done.

bbnks2 · 06-07-2017, 10:41 AM

Quote:

Originally Posted by weehe126

No, the box is 100% the restriction. There was an entire thread with flow testing done.

Sorry I meant more the concept of sealing the intake... A box doesn't necessarily have to present a restriction if it's size properly. A sealed intake is all benefits if sized properly.

Also, this is N55 related and I've seen plenty of other people say that removing the cover of the stock box resulted in 0 gains, which means both box and filter were bypassed. So that is completely contradicting to what you say. Can you link to what you refer to? I'd like to read and learn. Conical style filters naturally flow better than a flat panel filter as well. This is proven without a doubt.

There is also the factor of dyno pulls can easily vary 20+whp from pull to pull lol... Also, in real life air pressure feeds a sealed intake from an area of high pressure at the front fascia... The air pressure cannot be duplicated on a dyno. It would make sense that in a controlled environment like a dyno, with limited to no airflow, a stock box would present more of a restriction. Not a single test I've seen has ever even considered this.

ShakeZoola · 06-19-2017, 10:35 AM

Quote:

Originally Posted by bbnks2

Sorry I meant more the concept of sealing the intake... A box doesn't necessarily have to present a restriction if it's size properly. A sealed intake is all benefits if sized properly.

Also, this is N55 related and I've seen plenty of other people say that removing the cover of the stock box resulted in 0 gains, which means both box and filter were bypassed. So that is completely contradicting to what you say. Can you link to what you refer to? I'd like to read and learn. Conical style filters naturally flow better than a flat panel filter as well. This is proven without a doubt.

There is also the factor of dyno pulls can easily vary 20+whp from pull to pull lol... Also, in real life air pressure feeds a sealed intake from an area of high pressure at the front fascia... The air pressure cannot be duplicated on a dyno. It would make sense that in a controlled environment like a dyno, with limited to no airflow, a stock box would present more of a restriction. Not a single test I've seen has ever even considered this.

I've always thought about that ^^ , good information. From reading this thread tho i think ill just stick with my stock box setup, My BMS one had fitment issues anyway, doesnt seem to be worth the trouble

05-01-2017, 01:15 PM	#49
Xer0449 First Lieutenant 103 Rep 313 Posts Drives: 14' Evo GSR Join Date: Jun 2016 Location: LA iTrader: (3)	For the curious, here's how it looks over the BMS intake/filter: (like doody)
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05-26-2017, 11:35 AM	#50
Supacat Second Lieutenant 77 Rep 208 Posts Drives: 2021 X5 45e 2017 540i M-Sport Join Date: May 2016 Location: Las Vegas, NV iTrader: (0)	just sharing but If anyone still wants one I just picked it up on sale from Bavauto for $54! https://www.bavauto.com/catalogsearc...?q=+54-31918-B
	Appreciate 1 Xer0449102.50 Quote

05-31-2017, 03:13 PM	#52
Xer0449 First Lieutenant 103 Rep 313 Posts Drives: 14' Evo GSR Join Date: Jun 2016 Location: LA iTrader: (3)	I think mine was $80 off Amazon
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06-07-2017, 09:13 AM	#64
weehe126 Brigadier General 1189 Rep 3,225 Posts Drives: 2017 340i Join Date: Apr 2014 Location: San Antonio iTrader: (2)	No, the box is 100% the restriction. There was an entire thread with flow testing done.
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