05-06-2014, 04:34 AM | #1 |
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M235i aFe Power intake dyno test
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. Last edited by Brings; 05-06-2014 at 07:23 AM.. |
05-06-2014, 04:53 AM | #2 |
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Hmmmm... so it seems like it actually does *not* suck up more hot air as the "internet engineers" speculate and produces more power too!
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05-06-2014, 06:53 AM | #3 |
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Good notes OP.
Any car is going to be brought down by heat soak, even with the OEM box.
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05-06-2014, 07:39 AM | #4 |
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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?
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05-06-2014, 08:42 AM | #5 | |
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05-06-2014, 09:18 AM | #6 | |
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05-06-2014, 09:31 PM | #7 |
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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?
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05-06-2014, 09:33 PM | #8 |
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probably not. I ran intake + exhaust on my 128i and I got better MPG and better throttle response.
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05-07-2014, 03:43 AM | #9 | |
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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. |
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05-07-2014, 04:48 PM | #11 |
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05-07-2014, 10:28 PM | #13 | |
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It starts at $95 for 3 pulls. If you intend to do more, you'll probably want to call eAs for a custom quote. |
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05-08-2014, 02:28 AM | #14 |
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05-08-2014, 03:51 AM | #15 |
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05-09-2014, 01:32 PM | #17 | |
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its not like honda cars where you add an intake and you get that throaty sound. 1. no 2. yes 3. yes |
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05-13-2014, 11:17 PM | #18 | |
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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. |
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05-14-2014, 01:44 AM | #19 |
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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.
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07-23-2014, 10:32 PM | #20 |
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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.
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07-31-2014, 12:46 PM | #21 | |
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Notice any increase in MPG? |
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08-07-2014, 10:14 PM | #22 |
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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).
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