[Brings]

Just got my car dynoed at European Auto Source with JUST the aFe Power Magnum FORCE intake (open cone filter):

Results:


All dyno runs were done at European Auto Source, so there was no change in the dyno used.
Disclaimer: This is my own personal testing since I wanted to see the results for myself, so this is not a scientific test.

I did a stock dyno run of my car a few weeks ago where it yielded 302whp/320wtq with the IAT at 122F with ambient temps around 70F.

When I did the dyno test of my car with the aFe intake, the ambient temp was 100F! Unfortunately, I couldn't get the stock intake dyno done on the same day, so this is all I can report on.
With the aFe intake (no other mods), the car netted 8whp and 25wtq with IATs at 140F. A great gain in my opinion, considering the weather.

Then came the heatsoak test where we left the hood closed and the car idling for several minutes. The car lost 7whp and 6wtq (from stock values on a much cooler day) with IATs of 162F. It was not as bad as I thought it would be considering how much the armchair engineers complain about how bad it is.

Additionally, the IATs were actually quite close to each between the stock airbox and the aFe Power intake when I was driving around town (this was done back to back when I installed the aFe intake):


Really though, it would be relatively difficult to get IATs like in the heatsoak test unless you were letting the car idle in one place (on a very hot day) with no airflow. I actually tried to get the aFe intake to heatsoak while I was in eAs's parking lot, but was only able to get the IATs up to 150F (displayed using my Awron gauge) with ambient temps of 103F by idling the car for 10 minutes. After a quick drive though, it would drop down to the 127F range (much lower than what I was getting in the eAs warehouse) with the same ambient temps.

Here it is after idling for 10 minutes:


While driving at low speed (with A/C on) up and down the street at eAs:


Overall, I'm pretty happy with this intake. The power gains definitely outweigh the potential heatsoak that results in minimal power loss which really only occurs in very hot weather conditions with the car not moving. All the people who complain about the heatsoak are certainly not wrong, but I'd rather have this extra power pretty much in every driving situation than not.

[JustinCredibleM]

Hmmmm... so it seems like it actually does *not* suck up more hot air as the "internet engineers" speculate and produces more power too!

[Greenkirby21]

Good notes OP.

Any car is going to be brought down by heat soak, even with the OEM box.

[th1rd3y3]

Nice numbers. I'm pretty new BMW modifications coming from the Subaru world, so forgive me if this sounds odd. So no worries about tuning issues when adding this intake? I know an intake without tuning on a Subaru is usually a dangerous proposition so is this still safe?

[Delnari]

Originally Posted by th1rd3y3

Nice numbers. I'm pretty new BMW modifications coming from the Subaru world, so forgive me if this sounds odd. So no worries about tuning issues when adding this intake? I know an intake without tuning on a Subaru is usually a dangerous proposition so is this still safe?

You are right, I'm coming from a late model WRX over to the M235i myself and decided that the only way I was going to change the OEM airbox out was with a tune. Now, I haven't purchased a Pro-Tune (yet), but the JB4 Stage 1 was price low enough to go with and added the aFe Intake. When dyno'd together they had good numbers with a nearly 10% increase in peak power, but more important was the AFR was nearly unchanged from stock values keeping me safe from fueling problems that one normally sees with a CAI alone.

[th1rd3y3]

Originally Posted by Delnari

You are right, I'm coming from a late model WRX over to the M235i myself and decided that the only way I was going to change the OEM airbox out was with a tune. Now, I haven't purchased a Pro-Tune (yet), but the JB4 Stage 1 was price low enough to go with and added the aFe Intake. When dyno'd together they had good numbers with a nearly 10% increase in peak power, but more important was the AFR was nearly unchanged from stock values keeping me safe from fueling problems that one normally sees with a CAI alone.

Awesome, that's excellent to know. I'll most likely go for the JB4 or some tuning option first as the gains per $ are much better that way, but I'd prefer a few more options before jumping into that ring.

[Ramos]

That gage is awesome !! Great test OP. Can you elaborate on fueling problems from CAI only? I like CAI's for the induction sound, never felt a power difference. Wasn't planning on a tune, is there a problem with just a CAI?

[Greenkirby21]

Originally Posted by Ramos

That gage is awesome !! Great test OP. Can you elaborate on fueling problems from CAI only? I like CAI's for the induction sound, never felt a power difference. Wasn't planning on a tune, is there a problem with just a CAI?

probably not. I ran intake + exhaust on my 128i and I got better MPG and better throttle response.

[Delnari]

Originally Posted by Ramos

That gage is awesome !! Great test OP. Can you elaborate on fueling problems from CAI only? I like CAI's for the induction sound, never felt a power difference. Wasn't planning on a tune, is there a problem with just a CAI?

Do to the nature of a CAI allowing more airflow over the factory unit will cause your ECU to modify fueling with the change in airflow. Some manufacturer ECU's might not do a good job with the corrections while others do a better job with the corrections. Adding CAI is usually best done when you have a professional tuner modify the cars ECU table settings to get the most out of the change. Not tuning after just a CAI usually does not do much in the way of performance (depending on the CAI design) other than increase intake noise (air whistle) since the factory intake baffle has been removed.

Factory intakes are engineered and design the way they are based on compartment space, efficiency, and noise level. Much in the way your entire factory exhaust is designed. The issue is with air quality restrictions throughout the world have to be consider by the engineers when designing the systems. With globally deployed vehicles this is even harder for the engineers as they have to consider those various restrictions in each market and design a system that meets all of them. Aftermarket manufacturers are not so worried about clean air products as they are in power and sound it produces.

[Captain_Burgundy]

Any drone with this intake, especially on the 2-3K RMP for highway?

[kerm1t]

Originally Posted by Captain_Burgundy

Any drone with this intake, especially on the 2-3K RMP for highway?

intakes dont "drone". but no, any intake will sound stock 2-3k rpm unless u give it some gas. even then you'll hear more of the turbo wit the intake

[kerm1t]

how much was to dyno? and how many pulls?

[Brings]

Originally Posted by Captain_Burgundy

Any drone with this intake, especially on the 2-3K RMP for highway?

Drone doesn't really apply in this case since it won't make any noises while cruising with light throttle.

Originally Posted by kerm1t

how much was to dyno? and how many pulls?

It starts at $95 for 3 pulls. If you intend to do more, you'll probably want to call eAs for a custom quote.

[JustinCredibleM]

Originally Posted by kerm1t

how much was to dyno? and how many pulls?

We'll be at eAs tomorrow @kerm1t - you should stop by since you're in SoCal too .

[kerm1t]

Originally Posted by JustinCredibleM

We'll be at eAs tomorrow @kerm1t - you should stop by since you're in SoCal too .

haha yea i would love too, but works been biting me in the ass. its a little early but we should get a dyno day going

[Captain_Burgundy]

Could you describe your opinion of the engine sound?

1. Much Louder
2. Just some light "Swishing" with acceleration
3. Hardly a change

[kerm1t]

Originally Posted by Captain_Burgundy

Could you describe your opinion of the engine sound?

1. Much Louder
2. Just some light "Swishing" with acceleration
3. Hardly a change

again, its not a exhaust or something. the sound will be just like stock only you will hear ur diverter valve "woosh"

its not like honda cars where you add an intake and you get that throaty sound.

1. no
2. yes
3. yes

[JS919]

Originally Posted by JustinCredibleM

Hmmmm... so it seems like it actually does *not* suck up more hot air as the "internet engineers" speculate and produces more power too!

How can you suck hot air from the engine compartment with the hood open and huge fan blowing at it? All this proves is that you can make more power with this intake if you drive around with the hood open. I prefer to drive with my hood down.

[JustinCredibleM]

Originally Posted by JS919

How can you suck hot air from the engine compartment with the hood open and huge fan blowing at it? All this proves is that you can make more power with this intake if you drive around with the hood open. I prefer to drive with my hood down.

I was there when he did the dyno test... The test was done with the hood opened and closed which both yielded the same power curve (gains in horsepower and torque). In addition, the intake air temperatures between stock and aftermarket were the same, so this shows it can make more power at the same temperatures and probably because its able to move more volume of air into the engine. Hopefully this answers your question.

[HX_Guy]

Revising an old thread here but very nice results.. I'm pretty surprised at the stock numbers though, is the dyno they have there overly optimistic, 320 TQ at the wheels seems pretty nuts.

[YYZF22N55]

Originally Posted by Brings

Just got my car dynoed at European Auto Source with JUST the aFe Power Magnum FORCE intake (open cone filter):

Results:


All dyno runs were done at European Auto Source, so there was no change in the dyno used.
Disclaimer: This is my own personal testing since I wanted to see the results for myself, so this is not a scientific test.

I did a stock dyno run of my car a few weeks ago where it yielded 302whp/320wtq with the IAT at 122F with ambient temps around 70F.

When I did the dyno test of my car with the aFe intake, the ambient temp was 100F! Unfortunately, I couldn't get the stock intake dyno done on the same day, so this is all I can report on.
With the aFe intake (no other mods), the car netted 8whp and 25wtq with IATs at 140F. A great gain in my opinion, considering the weather.

Then came the heatsoak test where we left the hood closed and the car idling for several minutes. The car lost 7whp and 6wtq (from stock values on a much cooler day) with IATs of 162F. It was not as bad as I thought it would be considering how much the armchair engineers complain about how bad it is.

Additionally, the IATs were actually quite close to each between the stock airbox and the aFe Power intake when I was driving around town (this was done back to back when I installed the aFe intake):


Really though, it would be relatively difficult to get IATs like in the heatsoak test unless you were letting the car idle in one place (on a very hot day) with no airflow. I actually tried to get the aFe intake to heatsoak while I was in eAs's parking lot, but was only able to get the IATs up to 150F (displayed using my Awron gauge) with ambient temps of 103F by idling the car for 10 minutes. After a quick drive though, it would drop down to the 127F range (much lower than what I was getting in the eAs warehouse) with the same ambient temps.

Here it is after idling for 10 minutes:


While driving at low speed (with A/C on) up and down the street at eAs:


Overall, I'm pretty happy with this intake. The power gains definitely outweigh the potential heatsoak that results in minimal power loss which really only occurs in very hot weather conditions with the car not moving. All the people who complain about the heatsoak are certainly not wrong, but I'd rather have this extra power pretty much in every driving situation than not.

Hey OP. Did you get the Dry S or Pro 5 R filter?

Notice any increase in MPG?

[HP Autosport]

Originally Posted by JustinCredibleM

Hmmmm... so it seems like it actually does *not* suck up more hot air as the "internet engineers" speculate and produces more power too!

This has been brought up many times...as one will not likely drive their car at a standstill while the engine is revving at 7k rpm, dyno runs should be performed with proper airflow(simulating a moving vehicle) to the air inlet(s).