Dyno: aFe Pro-Dry S Intake VS Stock Air Box

ericsmc83 · 09-06-2008, 04:36 PM

The results speak for themselves.

Everything else is stock performance-wise. aFe intake had 200-250 miles of break-in before dyno day. Three runs were done with each intake, both hood open and closed (which didn't seem to make much difference with either). The aFe was run first since it was already installed, then I swapped it out with the stock air box, drove it for 30 minutes to adapt, then returned to the dyno.

The throttle response is definitely better with the aFe, as it seemed far more sluggish once I put the stock air box back in, which is there to stay for now. I guess it's easy to confuse throttle response improvement with performance improvement.

BMW engineering is amazing.

Results
Dynojet
SAE 5
Stock: 273.58 hp / 282.24 lb-ft
aFe: 267.84 hp / 275.27 lb-ft
Summary: 6hp / 7tq LOSS with aFe intake versus the stock air box

All Dyno Runs (missing the 6th run file)
Runs 1-2 are with the aFe intake.
Runs 3-5 are with the stock air box.

Best Runs
Run 1 is with the aFe intake.
Run 5 is with the stock air box.

DRF Files
RunFile_001.drf
RunFile_002.drf
RunFile_003.drf
RunFile_004.drf
RunFile_005.drf

Video - Stock Run

Driver72 · 09-06-2008, 04:43 PM

A bit surprising that there was a lose, but at the same time, not really since another dyno showed a loss with the AFE too.
Once again, as I've said, just add a $50 K&N drop in to the stock airbox.
Does well enough unless you want to push out more than 360 rwhp.

I got 3-4 rwhp peak gain from just the drop in, and as much as 10 rwhp gain in other areas of the curve.
Others have shown no gain with drop in. But overall, I think 2-4 rwhp peak gain from drop in is normal.

E90AWMT · 09-06-2008, 04:47 PM

tell you the truth... I'm not impressed with mine either. didn't do the dyno but I thought that it was going to be better.

Just my .02

BLAZED · 09-06-2008, 05:07 PM

This is one example of disappointing results, and more will likely follow. I'm glad I held off on this intake and other dual cones on the market simply because these systems are flawed in design IMO. I think a lot of buyers really believed that it would gain 27hp

Klepper1 · 09-06-2008, 05:09 PM

Thanks for putting the time and effort into testing. Your results are what some of us suspected, unfortunately.

e90AW335i · 09-06-2008, 05:26 PM

What they hell is up with your AFRs on your stock run?

e90AW335i · 09-06-2008, 05:32 PM

Also, I would like to see this kind of dyno comparison done with the oiled filters....

sflgator · 09-06-2008, 05:40 PM

Very unhappy about this.

Thank you for doing the dyno though. However, I know some ppl would also like to see dynos from tuned 335i's with the stock intake and then with the aFe "oiled" intake. Not betting on better results, but we can still hope.

Driver72 · 09-06-2008, 05:48 PM

If I was the OP I'd contact AFE and get my money back.
If they refuse, show them the dyno and make a copy of their statement of a 27 hp gain.
If they still refuse, tell them you'll let everybody on every BMW forum know that they will NOT buy back their product after an advertisement claim that has proved on a couple occasions to be false.

You'd have to be silly to believe an intake alone could get you 27 hp on this car. Especially since NUMEROUS other intakes that have already been on the market can't get 1/2 that amount either. There is surely nothing so special about theirs that would give you twice what others have claimed. The only thing special about it, appears to be that it's the only one that actually causes you to lose the most power.

sflgator · 09-06-2008, 05:51 PM

Quote:

Originally Posted by Driver72

If I was the OP I'd contact AFE and get my money back.
If they refuse, show them the dyno and make a copy of their statement of a 27 hp gain.
If they still refuse, tell them you'll let everybody on every BMW forum know that they will NOT buy back their product after an advertisement claim that has proved on a couple occasions to be false.

You'd have to be silly to believe an intake alone could get you 27 hp on this car. Especially since NUMEROUS other intakes that have already been on the market can't get 1/2 that amount either. There is surely nothing so special about theirs that would give you twice what others have claimed. The only thing special about it, appears to be that it's the only one that actually causes you to lose the most power.

I bet many ppl would be happy with +10WHP/10 lb.-ft. RWTQ gain running the aFe intake + PROcede v3 Stage 1 map (as opposed to the oem stock intake and v3 stage 0 map) or JB3.

BES335xi · 09-06-2008, 06:07 PM

damn, dont tell me i spent 300 for nothing. LOL someone should do a dyno with the oiled version..

techforge · 09-06-2008, 06:08 PM

Does anybody suspect this is due to pulling hot air with the AFE?

e90AW335i · 09-06-2008, 06:08 PM

Quote:

Originally Posted by BES335xi

damn, dont tell me i spent 300 for nothing. LOL someone should do a dyno with the oiled version..

You spent 300 dollars for nothing.

techforge · 09-06-2008, 06:11 PM

Quote:

Originally Posted by BES335xi

damn, dont tell me i spent 300 for nothing. LOL someone should do a dyno with the oiled version..

Nah - at least it looks good if nothing more

BES335xi · 09-06-2008, 06:20 PM

lolol Kyle, yeah Thank's for the " REMINDER " ..

Tech...yeah it does lo0k good, but fukked up if i'm losing power. i got the oiled version running with jb2...soon jb3 i'm hoping i'll gain atleast a little, i dont even care if i gain 5rhwp it does lo0k good.

but if i'm losing that much power as the OP...i'm going to stomp on it , not even try to sell and never buy another intake again lmao.

lawdude · 09-06-2008, 06:28 PM

Quote:

Originally Posted by e90AW335i

You spent 300 dollars for nothing.

Me too. Well, not for nothing. It looks cool. That's gotta be worth at least twenty five bucks.

ericsmc83 · 09-06-2008, 06:31 PM

Quote:

Originally Posted by lawdude

Me too. Well, not for nothing. It looks cool. That's gotta be worth at least twenty five bucks.

You're right. Not for nothing. For less than nothing.

E82tt6 · 09-06-2008, 06:37 PM

And THIS is why I waited to see dynos instead of saying "wow that looks sexy" and wasting my hard earned cash. I knew that "27 hp" figure was bull.

JohnL135I · 09-06-2008, 06:39 PM

I just replaced my AEF intake with my stock air box. I have a helene drop in filter in the stock air box. As far as performance increase/decrease, It feels about the same.

However, yesterday I did some temp. tests with a wireless temp sensor. I placed the sensor between both of my AFE filters and drove the car. The temps reached 140F with outside ambient temp at around 100F. I placed the sensor in the factory air snorket and the temps at 70 mph read within 5 deg of ambient., at one point within 1 degree.

With that said, the factory air box is at least pulling in ambient air vs engine compartment air..... I understand that the turbo compresses the air etc... but at almost a 40 deg temp difference, I feel better with the stock box for now.

I also noted a lower oil temp today driving with the stock air box at 102F vs the afe at 100F yesterday.....

ala012 · 09-06-2008, 06:42 PM

WOW...very disappointed result...

I have AFE Intake....

Time to sue the company....^^

down4it · 09-06-2008, 06:52 PM

I think either the dry filters are too restrictive or the filters on the AFE kit are too small... Maybe the oiled filters are better... I run the AFE and this is pretty dissapointing...

ThePrinzeofcatz · 09-06-2008, 06:57 PM

wow now that i see this, i am probably going to take off my bms dual cones, because if the afe lost power and it uses a heat sheild system, i would belive the bms would have more of a power loss due to the fact that it doesnt have any heat sheild. But perhaps, when i get the jb3, it will be a diffrent story

09-06-2008, 04:36 PM	#1
ericsmc83 Captain 65 Rep 986 Posts Drives: 08 E92 335i MT Join Date: Sep 2007 Location: Las Vegas, NV iTrader: (9)	Dyno: aFe Pro-Dry S Intake VS Stock Air Box The results speak for themselves. Everything else is stock performance-wise. aFe intake had 200-250 miles of break-in before dyno day. Three runs were done with each intake, both hood open and closed (which didn't seem to make much difference with either). The aFe was run first since it was already installed, then I swapped it out with the stock air box, drove it for 30 minutes to adapt, then returned to the dyno. The throttle response is definitely better with the aFe, as it seemed far more sluggish once I put the stock air box back in, which is there to stay for now. I guess it's easy to confuse throttle response improvement with performance improvement. BMW engineering is amazing. Results Dynojet SAE 5 Stock: 273.58 hp / 282.24 lb-ft aFe: 267.84 hp / 275.27 lb-ft Summary: 6hp / 7tq LOSS with aFe intake versus the stock air box All Dyno Runs (missing the 6th run file) Runs 1-2 are with the aFe intake. Runs 3-5 are with the stock air box. Best Runs Run 1 is with the aFe intake. Run 5 is with the stock air box. DRF Files RunFile_001.drf RunFile_002.drf RunFile_003.drf RunFile_004.drf RunFile_005.drf Video - Stock Run __________________ 2008 E92 MT \| VTT Stage 2+ 20T \| VTT Inlets \| JB4 MHD E85 \| Fuel-It Stage 3 LPFP w/FPR and Return \| BMS PI \| AR DP \| AE Quad Exhaust \| Helix FMIC \| ER CP \| Tial BOV \| DCI \| AR OCC \| Spec Stage 3+ \| SMFW Last edited by ericsmc83; 09-10-2008 at 10:36 PM.. Reason: More descriptive summary
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09-06-2008, 04:43 PM	#2
Driver72 Brigadier General 327 Rep 4,484 Posts Drives: 335i - to new owners now. Join Date: Dec 2006 Location: California iTrader: (0)	A bit surprising that there was a lose, but at the same time, not really since another dyno showed a loss with the AFE too. Once again, as I've said, just add a $50 K&N drop in to the stock airbox. Does well enough unless you want to push out more than 360 rwhp. I got 3-4 rwhp peak gain from just the drop in, and as much as 10 rwhp gain in other areas of the curve. Others have shown no gain with drop in. But overall, I think 2-4 rwhp peak gain from drop in is normal.
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09-06-2008, 04:47 PM	#3
E90AWMT Second Lieutenant 21 Rep 208 Posts Drives: AW E90 Sport Premium 6sp MT Join Date: Nov 2007 Location: Miami iTrader: (4)	tell you the truth... I'm not impressed with mine either. didn't do the dyno but I thought that it was going to be better. Just my .02
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09-06-2008, 05:07 PM	#4
BLAZED Conscious heads stay lifted... 49 Rep 518 Posts Drives: 2015 M4 6spd Join Date: Aug 2007 Location: Reno, NV iTrader: (4) Garage List 94 Toyota TRD Wideb ... [0.00] 2006 Dodge Viper SR ... [0.00] 1994 Toyota Supra t ... [0.00] 2008 BMW 335i E92 [0.00] 2006 Mitsubishi Evo ... [5.50]	This is one example of disappointing results, and more will likely follow. I'm glad I held off on this intake and other dual cones on the market simply because these systems are flawed in design IMO. I think a lot of buyers really believed that it would gain 27hp __________________ 2015 BMW M4 6spd 1997 Toyota Supra Turbo 6spd
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09-06-2008, 05:09 PM	#5
Klepper1 Lieutenant 28 Rep 548 Posts Drives: 2011 1M Join Date: Dec 2007 Location: Houston, Texas iTrader: (7)	Thanks for putting the time and effort into testing. Your results are what some of us suspected, unfortunately.
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09-06-2008, 05:26 PM	#6
e90AW335i Major General 137 Rep 6,608 Posts Drives: e90 335i Join Date: Sep 2007 Location: ...... iTrader: (4)	What they hell is up with your AFRs on your stock run? __________________ I install all tunes, intakes, o2 simms, and most cosmetic mods. PM me for a quote.
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09-06-2008, 05:32 PM	#7
e90AW335i Major General 137 Rep 6,608 Posts Drives: e90 335i Join Date: Sep 2007 Location: ...... iTrader: (4)	Also, I would like to see this kind of dyno comparison done with the oiled filters.... __________________ I install all tunes, intakes, o2 simms, and most cosmetic mods. PM me for a quote.
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09-06-2008, 05:40 PM	#8
sflgator Major General 148 Rep 5,389 Posts Drives: '09 MB C63 AMG & '08 MB GL450 Join Date: Oct 2006 Location: U.S. iTrader: (1)	Very unhappy about this. Thank you for doing the dyno though. However, I know some ppl would also like to see dynos from tuned 335i's with the stock intake and then with the aFe "oiled" intake. Not betting on better results, but we can still hope. __________________ \|2009 RENNtech MB C63 AMG \| Black/Black Leather/Black Maple \| Premium II \| MultiMedia \| iPod \| \| TeleAid \| Charcoal Filter Delete \| BMC High-Flow Air Filters \| High-Flow Secondary Cats \| Clear Side Markers \|
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09-06-2008, 05:48 PM	#9
Driver72 Brigadier General 327 Rep 4,484 Posts Drives: 335i - to new owners now. Join Date: Dec 2006 Location: California iTrader: (0)	If I was the OP I'd contact AFE and get my money back. If they refuse, show them the dyno and make a copy of their statement of a 27 hp gain. If they still refuse, tell them you'll let everybody on every BMW forum know that they will NOT buy back their product after an advertisement claim that has proved on a couple occasions to be false. You'd have to be silly to believe an intake alone could get you 27 hp on this car. Especially since NUMEROUS other intakes that have already been on the market can't get 1/2 that amount either. There is surely nothing so special about theirs that would give you twice what others have claimed. The only thing special about it, appears to be that it's the only one that actually causes you to lose the most power.
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09-06-2008, 06:07 PM	#11
BES335xi Colonel 83 Rep 2,132 Posts Drives: FBO+ N54xi Join Date: Mar 2008 Location: Queens, NYC iTrader: (4) Garage List 03/07 E90 335xi [1.00]	damn, dont tell me i spent 300 for nothing. LOL someone should do a dyno with the oiled version.. __________________ JB4+usb \| P3 Vent Boost Gauge v2 \| BMS OCC \| BMS DCI \| AMS FMIC \| AR xi CL DP's \| BT Tool \| Edibias/NCSExpert/INPA BMW Coding \| Cyba Quad Exhaust tips \| M-Tech Rear & M3 Front Bumper \| Red Cyba Air Scoops \| Blacklines \| Vinyl Overlays \| ACS Roof Spoiler \| Matte Black Grilles \| LED Side Mirrors \| Rear Euro Fogs \| etc.. .
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09-06-2008, 06:08 PM	#12
techforge Lieutenant 26 Rep 577 Posts Drives: 335xi coupe Join Date: Jul 2008 Location: Denver iTrader: (2)	Does anybody suspect this is due to pulling hot air with the AFE?
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09-06-2008, 06:20 PM	#15
BES335xi Colonel 83 Rep 2,132 Posts Drives: FBO+ N54xi Join Date: Mar 2008 Location: Queens, NYC iTrader: (4) Garage List 03/07 E90 335xi [1.00]	lolol Kyle, yeah Thank's for the " REMINDER " .. Tech...yeah it does lo0k good, but fukked up if i'm losing power. i got the oiled version running with jb2...soon jb3 i'm hoping i'll gain atleast a little, i dont even care if i gain 5rhwp it does lo0k good. but if i'm losing that much power as the OP...i'm going to stomp on it , not even try to sell and never buy another intake again lmao. __________________ JB4+usb \| P3 Vent Boost Gauge v2 \| BMS OCC \| BMS DCI \| AMS FMIC \| AR xi CL DP's \| BT Tool \| Edibias/NCSExpert/INPA BMW Coding \| Cyba Quad Exhaust tips \| M-Tech Rear & M3 Front Bumper \| Red Cyba Air Scoops \| Blacklines \| Vinyl Overlays \| ACS Roof Spoiler \| Matte Black Grilles \| LED Side Mirrors \| Rear Euro Fogs \| etc.. .
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09-06-2008, 06:37 PM	#18
E82tt6 Colonel 103 Rep 2,626 Posts Drives: '08 Black Saphire Z4 MC Join Date: Oct 2007 Location: New Jersey iTrader: (0)	And THIS is why I waited to see dynos instead of saying "wow that looks sexy" and wasting my hard earned cash. I knew that "27 hp" figure was bull. __________________ '08 Black Saphire/Black Z4 M Coupe RIP Gretta: Blue Water/Lemon 135i. Died to save me. -ChuckV
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09-06-2008, 06:39 PM	#19
JohnL135I Donkey Kong King 89 Rep 1,129 Posts Drives: 2012 Boss 302 Join Date: Dec 2007 Location: Sahuarita, AZ iTrader: (3)	I just replaced my AEF intake with my stock air box. I have a helene drop in filter in the stock air box. As far as performance increase/decrease, It feels about the same. However, yesterday I did some temp. tests with a wireless temp sensor. I placed the sensor between both of my AFE filters and drove the car. The temps reached 140F with outside ambient temp at around 100F. I placed the sensor in the factory air snorket and the temps at 70 mph read within 5 deg of ambient., at one point within 1 degree. With that said, the factory air box is at least pulling in ambient air vs engine compartment air..... I understand that the turbo compresses the air etc... but at almost a 40 deg temp difference, I feel better with the stock box for now. I also noted a lower oil temp today driving with the stock air box at 102F vs the afe at 100F yesterday.....
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09-06-2008, 06:42 PM	#20
ala012 Koala012 20 Rep 637 Posts Drives: E92 M3 Dakar Yellow Join Date: May 2008 Location: NJ, Seoul S.Korea iTrader: (12) Garage List 2007 BMW 335i [0.00]	WOW...very disappointed result... I have AFE Intake.... Time to sue the company....^^ __________________ E92 M3 Dakar Yellow DCT \| CF Trim Akrapovic EVO Exhaust \| RECARO RS-F SK2 Seat \| KW Clubsports \| H&R Sway Bar \| DCT Cooler \| iTG Air Filter \| Volk TE37 SL + RS3 Tire
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09-06-2008, 06:52 PM	#21
down4it Banned 62 Rep 1,743 Posts Drives: E92 335i Join Date: Jul 2007 Location: SoCal iTrader: (3)	I think either the dry filters are too restrictive or the filters on the AFE kit are too small... Maybe the oiled filters are better... I run the AFE and this is pretty dissapointing...
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09-06-2008, 06:57 PM	#22
ThePrinzeofcatz Captain 49 Rep 642 Posts Drives: e92 335i MT Join Date: Mar 2007 Location: South Florida iTrader: (3)	wow now that i see this, i am probably going to take off my bms dual cones, because if the afe lost power and it uses a heat sheild system, i would belive the bms would have more of a power loss due to the fact that it doesnt have any heat sheild. But perhaps, when i get the jb3, it will be a diffrent story __________________ Sleeper...
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