Stock airbox rated HP?

AndreM818 · 11-02-2010, 08:50 PM

did a search but nothing came out. How much horsepower is the stock airbox good until?

zenmaster · 11-02-2010, 08:55 PM

Why? With everything else stock, is it a limiting factor? I doubt it.

Brey335i · 11-02-2010, 09:08 PM

Quote:

Originally Posted by AndreM818

did a search but nothing came out. How much horsepower is the stock airbox good until?

400 I'd say...

onesuperboi · 11-02-2010, 09:09 PM

I think me meant asking how much HP can the stock air box support before it becomes restrictive.

AndreM818 · 11-02-2010, 11:02 PM

Quote:

Originally Posted by onesuperboi

I think me meant asking how much HP can the stock air box support before it becomes restrictive.

this

mwahlert · 11-03-2010, 08:04 AM

Quote:

Originally Posted by AndreM818

this

i made 375rwhp, about 425rwtq on the stock airbox

Dr. G · 11-03-2010, 08:13 AM

Quote:

Originally Posted by mwahlert

i made 375rwhp, about 425rwtq on the stock airbox

I'm Curious as to why you didn't switch the stock airbox?

mwahlert · 11-03-2010, 08:15 AM

Quote:

Originally Posted by Dr. G

I'm Curious as to why you didn't switch the stock airbox?

i had DCI's at one point.... idk - every car i've ever owned i always fell to the hype of changing the stock intake out, and i always end up putting it back in because i always feel a loss of torque off boost.

enrita · 11-03-2010, 08:19 AM

I would remove it above 14.5 psi of boost.

mycoupe · 11-03-2010, 12:06 PM

Quote:

Originally Posted by enrita

I would remove it above 14.5 psi of boost.

I would remove it above 22.37564 psi...see I can randomly throw out numbers too

blisstik · 11-03-2010, 12:11 PM

I think he's basing it on GIAC flash. Stage 1 made approx 14.5 PSI and no intake was required. When you go stage 2, it's strongly recommended with DPs.

Penn999 · 11-03-2010, 12:25 PM

Actually its just physics, Enrita now runs the procede. Its not about GIAC. At 14.5psi and up you need more surface area on the filter. The stock air box can simply not supply enough air for the turbos to run efficiently. When you start limiting air to the engine your AFR's are miscued and the car wont run to its full potential. If you want the best of both worlds check out ASR. They have a closed box similar to the stock one. It has supported their 500+ whp 135i. I dont think they have updated their website but if you want more info I would give them a call. Its one expensive setup tho. 2000 for intake and bov. (they come as a package bc no other bov or dv will work with the air box)

ar design · 11-03-2010, 12:44 PM

Quote:

Originally Posted by Penn999

Actually its just physics, Enrita now runs the procede. Its not about GIAC. At 14.5psi and up you need more surface area on the filter. The stock air box can simply not supply enough air for the turbos to run efficiently. When you start limiting air to the engine your AFR's are miscued and the car wont run to its full potential. If you want the best of both worlds check out ASR. They have a closed box similar to the stock one. It has supported their 500+ whp 135i. I dont think they have updated their website but if you want more info I would give them a call. Its one expensive setup tho. 2000 for intake and bov. (they come as a package bc no other bov or dv will work with the air box)

http://www.e90post.com/forums/showth...=329159&page=2

Penn999 · 11-03-2010, 12:55 PM

Quote:

Originally Posted by ar design

http://www.e90post.com/forums/showth...=329159&page=2

WOW, I knew they had some things to sort out but DAYUM! Scratch that lol. Abid seemed like he was pretty sincere to me when I spoke to him on the phone but hey, you only have to make a mistake once for it mess up business FOREVER. I cant comment on their current status but I talked to them a few months ago and they were still up and running. Do you know any more details about this transaction? I would sue the hell out of um (IF THIS IS IN FACT THE CASE). By the way AR, i should be receiving your oil cooler and occ from mike here shortly. How tough is that install?

R1000K3 · 11-03-2010, 03:12 PM

Quote:

Originally Posted by mwahlert

i had DCI's at one point.... idk - every car i've ever owned i always fell to the hype of changing the stock intake out, and i always end up putting it back in because i always feel a loss of torque off boost.

The is no reason that I can see why the N54 would normally produce less power off boost with DCI vs. STD intake. It may be a difference in favor to STD intake in extreme situations like if it is very hot and the car is driven at walking speed.

tscdennab · 11-03-2010, 03:25 PM

Quote:

Originally Posted by R1000K3

The is no reason that I can see why the N54 would normally produce less power off boost with DCI vs. STD intake.

Lack of RAM effect ? Hot air entering the engine causing the ECU to pull timing when requesting full torque / full boost at low RPMs ?

R1000K3 · 11-03-2010, 03:43 PM

You can probably find extreme situations like I mentioned in the previous post where the STD intake may be slightly better but a DCI or even better the Mr.5 CAI, will almost always perform better. Another situation where the stock intake should be ahead for a while is directly after take off when the car has been idling for some time when it is very warm outside and frigging hot in the engine bay. But these are not typical driving situations for most people unless you are in a real hot climate and the traffic is jammed and slow.

Penn999 · 11-03-2010, 07:31 PM

^ Good idea

11-02-2010, 08:50 PM	#1
AndreM818 Stealth Bomber 41 Rep 564 Posts Drives: this ^ Join Date: Dec 2009 Location: SoCal iTrader: (3)	Stock airbox rated HP? did a search but nothing came out. How much horsepower is the stock airbox good until?
	Appreciate 0 Tweet Quote

11-02-2010, 08:55 PM	#2
zenmaster Brigadier General 1577 Rep 3,888 Posts Drives: '17 M2 Join Date: Mar 2007 Location: Atlanta iTrader: (1)	Why? With everything else stock, is it a limiting factor? I doubt it.
	Appreciate 0 Quote

11-02-2010, 09:09 PM	#4
onesuperboi Major 52 Rep 1,357 Posts Drives: '08 e92 335i COBB 4.01 Stage 1 Join Date: Aug 2008 Location: Bay Area, CA (Alameda) iTrader: (6)	I think me meant asking how much HP can the stock air box support before it becomes restrictive.
	Appreciate 0 Quote

11-03-2010, 08:19 AM	#9
enrita Major General 161 Rep 7,377 Posts Drives: 335i - Big turbos Join Date: Sep 2008 Location: Italian in Sweden iTrader: (0)	I would remove it above 14.5 psi of boost. __________________ 07 335i AT - MOTIV 750 - MHD E85 BMS flash - BMS PI - JB4G5 - Okada Coils - NGK 5992 Plugs - Helix IC - Snow Stg. 3 - Stett CP - Custom midpipes with 100 HJS Cats - Bastuck Quad - PSS10 - QUAIFE LSD - BMS OCC - Forge DVs - AR OC - ALCON BBK - M3 Chassi - Dinan CP - Velocity M rear Toe arms - Advan RZ-DF - LUX H8 - Level 10 AT upgrade
	Appreciate 0 Quote

11-03-2010, 12:11 PM	#11
blisstik Lieutenant Colonel 151 Rep 1,677 Posts Drives: E92 Join Date: Jul 2009 Location: California iTrader: (14)	I think he's basing it on GIAC flash. Stage 1 made approx 14.5 PSI and no intake was required. When you go stage 2, it's strongly recommended with DPs.
	Appreciate 0 Quote

11-03-2010, 12:25 PM	#12
Penn999 Lieutenant Colonel 49 Rep 1,661 Posts Drives: 335i coupe Join Date: May 2010 Location: VA iTrader: (3)	Actually its just physics, Enrita now runs the procede. Its not about GIAC. At 14.5psi and up you need more surface area on the filter. The stock air box can simply not supply enough air for the turbos to run efficiently. When you start limiting air to the engine your AFR's are miscued and the car wont run to its full potential. If you want the best of both worlds check out ASR. They have a closed box similar to the stock one. It has supported their 500+ whp 135i. I dont think they have updated their website but if you want more info I would give them a call. Its one expensive setup tho. 2000 for intake and bov. (they come as a package bc no other bov or dv will work with the air box)
	Appreciate 0 Quote

11-03-2010, 03:43 PM	#17
R1000K3 Major 55 Rep 1,311 Posts Drives: 335i MT Join Date: Jul 2009 Location: USA iTrader: (0)	You can probably find extreme situations like I mentioned in the previous post where the STD intake may be slightly better but a DCI or even better the Mr.5 CAI, will almost always perform better. Another situation where the stock intake should be ahead for a while is directly after take off when the car has been idling for some time when it is very warm outside and frigging hot in the engine bay. But these are not typical driving situations for most people unless you are in a real hot climate and the traffic is jammed and slow.
	Appreciate 0 Quote

11-03-2010, 07:31 PM	#18
Penn999 Lieutenant Colonel 49 Rep 1,661 Posts Drives: 335i coupe Join Date: May 2010 Location: VA iTrader: (3)	^ Good idea
	Appreciate 0 Quote