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01-21-2010, 01:49 PM | #24 |
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^^^ Agreed, very nice write up. I think it's very comical how people are still attacking the results even though they were performed by an independent third party. The results may not be dead-nutts (due to being performed on different days), but you can clearly tell by the dyno chart that the car pulls much more cleanly up to redline. That's the type of thing that makes the car feel much better even if it only added 10hp rather than 13hp....just my .02 .
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01-21-2010, 05:55 PM | #25 |
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An accurate test to perform is to allow for the ECU to adapt for 200-400 miles as was done by Will. The stock dyno was done on a cold rainy day and the aFe comparison was done on a warm sunny day. Even with the difference in temperature between the two days the aFe intake still proved to have a gain over the stock system on the dyno.
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01-21-2010, 06:20 PM | #26 | |
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01-21-2010, 06:39 PM | #27 |
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I never said that dyno testing couldn't be done on the same day. I'm simply saying that the ECU should be given time and miles to adapt to any new parts before it's able to reach its full potential. For example, when Mike Brown, the CEO of **********s.com did his dyno for his 135i he ran into the same dilemma that a lot of people are facing with a power loss. The first dyno run he did with the aFe intake installed showed a power loss of 14. The second run a power loss of 12 and the third run 11. Each time the dyno was done showed less and less of a loss. The final decision was to go ahead and drive the car for 200 miles and do the dyno at a later date. Once the ECU was given time to adapt the car showed a gain of 12 horsepower. Yes, the weather variable can be taken into consideration. However, the dyno for Will's M3 with it's stock intake box was done on a rainy day which was much colder than the day of the aFe intake dyno.
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01-21-2010, 07:43 PM | #28 | |
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Who specified these 200-400 miles is required for adaptation? Even a bad batch of fuel can skew end results. Mike was even present during the intake shootout we did at evosport in which various S54 intakes were tested, all with a 30 minute drive in between runs for adaption. As stated before - there are a lot of unanswered questions. I've seen companies direct fans into intakes, ice down intakes, load the rollers during the baseline run, drop in a few gallons of race gas, you name it: in the quest for that magic peak numbers. I don't think SP would do these types of things, but others do. We can only take your word for it. PencilGeek posted an excellent article on this very subject: http://www.m3post.com/forums/showthread.php?t=305673 Peak numbers don't mean squat. "power loss of 14" means nothing. We want to see relative gains across the board, comparing deltas. What other modifications were performed? Will also had the GIAC flash performed at our facility last September and I think is running Powerchip now. This information should be listed in advance when making claims. The weather variable is only one of many things to be taken into consideration. On the subject of the N54 intakes, these lost hp across the board after installing, there are numerous posts about this on e90Post and 1Addicts, yet are still touted as making over 30hp. Please don't cloud facts with guerilla marketing, M3 owners are educated enough to know the difference. Back on the M3 subject - according to the chart, an entire month elapsed between runs. Were the dynos performed with the hood up or down? What were the conditions like before and after? If you do not have environmental data handy, it can be extracted from the DRF files (assuming it was a dynojet) if needed. Please understand I am not flaming you personally in any way, but want to get cold hard facts out there as we have enough "independent reviews" out there with much different intentions than being an enthusiastic one. If the results are accurate - then that's a step in the right direction, but the stock airbox was a very good design from the start. Time will tell if these claims hold water as others who purchase the kits will be making their own trips to the dyno and will be posting their results.
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01-21-2010, 08:12 PM | #29 |
I like cars
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12-11-2014, 11:22 AM | #30 |
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so the outcome looks very clear, I was thinking about replacing the stock box with afe but now I think I will just stick with oem.
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12-11-2014, 12:59 PM | #31 |
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Just by an aftermarket air filter. proven 6whp pick up.
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12-11-2014, 01:42 PM | #32 |
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Or save 600 bucks and simply put in test pipes and see actual proven gains, far to many times its been proven that an intake is a total waste of money for this car. The 2-5 hp gains you may see are from the filter nothing more
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12-11-2014, 07:54 PM | #33 |
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My Results vs. AA Green Filter by itself.
Thread: http://www.m3post.com/forums/showthread.php?t=1035254 Results: |
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12-11-2014, 07:56 PM | #34 | |
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As individuals, we can only provide our results and personal experiences. |
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12-11-2014, 08:11 PM | #35 |
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Not sure why someone thought it was a good idea to bump a 5 year old thread.
Why does your before and after runs have the same filename?
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12-12-2014, 09:27 AM | #36 |
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12-12-2014, 10:14 AM | #37 |
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It's better than recreating a new thread with the same subject matter.
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