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Air Filter Dyno Testing - Round 2 - K&N vs Helene vs ITG vs BMC vs BMS vs Stock
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04-28-2008, 02:57 AM | #1 |
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Air Filter Dyno Testing - Round 2 - K&N vs Helene vs ITG vs BMC vs BMS vs Stock
Round 2 of testing is finally complete. Round 1 of testing can be found here. This test included a few more filters and was performed slightly differently from Round 1. Another variable to consider is the ambient temperature, which was a toasty 94* during today's testing. The temperature during Round 1 was much cooler (60's if memory serves correct).
Filters tested: Stock, ITG, K&N, BMC, Helene, BMS Test Vehicle: 2008 335xi E92 6AT with JB2 and no secondary cats Test Procedure: Each pull was done in 3rd gear. Repeated 4th gear pulls on this load-bearing dyno causes overheating even with the factory oil cooler installed and plenty of airflow in the dyno cell. RPM sampling range was from 2k to 6.8k. Boost was sampled from the BOV vacuum line, and AFR was sampled at the right-side tailpipe using an Innovate LM-1 wideband. The vehicle was warmed up to the point of the oil temp gauge being 3 hash marks short of 250* for the first run to begin for each filter. After each run, the car was allowed a few minutes of cooldown until the oil temp again read 3 hash marks short of 250*. Four runs were done on each filter. The best run for each filter is shown below compared to the stock filter (stock is the solid line). Underscoring the impact of heat, you'll see that the best run for nearly every filter (save the BMC) was the first run. The other runs, grouped by filter, are also found below. Ambient temperature remained between 91* and 94* during the entire test with humidity at 32%. Conclusion: Under these conditions, none of the aftermarket filters outperform the stock filter. -------------------------------------- -------------------------------------- |
04-28-2008, 03:27 AM | #4 |
Samtaro!
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So filters have no effect on stock cars. It would have been interesting to see a run with no filter installed with stock airbox, to get the theoretical max possible with any filter.
Also would be interesting to see effects of various filters with a tune.
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04-28-2008, 04:24 AM | #5 |
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interesting. need a full setup air intake to gain hp.
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08 BMW BSM 335i 6MT (Sports, Premium, NAV, PDC, AS, IPOD, HD Radio, Rear Sunshade, OEM Alarm) Angel iBright V3, Luminics Fog Bulb, Turbo Tuner, K&N Drop in Filter, Dinan Exhaust, Dinan Pedals, Vorsteiner CF Front Lip, and CF Rear Diffuser. Ordered:08/25/07 Started: 09/09/07 Finished: 09/14/07 On Ship: 09/15/07 Arrived: 10/08/07 Delivered: 10/10/07 |
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04-28-2008, 07:05 AM | #6 |
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04-28-2008, 07:44 AM | #7 |
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He has a tune
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04-28-2008, 07:57 AM | #8 |
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Someone already tested with no filter installed and reported no increase.
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2011 Alpine 335d M-Sport 12.34 @ 110.48mph
2019 i3s Terra, 2008 Black 335i Sedan. 11.11@ 129.47 mph 2008 Monaco Blue JB3 2.0 335i Coupe. 11.33 @ 132.77 mph, 60-130mph: 6.95 seconds 2023 i4 M50 11.48 @ 121.56mph, 3.43 0-60 (dragy) |
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04-28-2008, 08:17 AM | #9 | |
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Quote:
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04-28-2008, 08:51 AM | #10 |
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What about adaptation?
Also, perhaps the better indicator is the 1/4 track instead of a dyno with fans. But overall, I am impressed with the effort. Kudos to you for providing impartial evidence for the N54 community. |
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04-28-2008, 08:56 AM | #11 |
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so basically from your dynos it showing that there is no effect of which brand used, the gains are nominal to the point that u can say all these companies stating gains in hp is not as great as advertised!!! Hmmmmmmm!!!!
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04-28-2008, 09:19 AM | #12 |
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If that is the case then I am sure that would apple to UR's CAI as well.....
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04-28-2008, 09:32 AM | #13 | |
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PM me the info you have for ambient temperature and relative humidity of the previous test. Orb |
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04-28-2008, 11:05 AM | #15 | ||
Samtaro!
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Why are power levels so low? I just saw the graphs and concluded it was stock. 272whp... Quote:
...or that we can criticize the tester for not allowing the ECU to adapt to each filter...?
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04-28-2008, 11:06 AM | #16 |
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Very interesting info, and thanks for the time you spent collecting and testing all those filters. It looks like the BMC is still on top, even by a bit. This thread should be a sticky 100%.
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04-28-2008, 12:01 PM | #19 |
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Take a look at the stock intake box. When air flows up through the filter and then across that barrier, and down to the intake horns, the cross section gets pretty small. That is going to be the largest restriction.
I just ordered some ITG cone filters, with an integrated velocity stack, that slip into the stock air intake tubes. I'll keep y'all updated when I receive them in a week or two. |
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04-28-2008, 12:27 PM | #20 | |
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Response to the filter testing per Terry Burger@BMS:
Quote:
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