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BMW 3-Series (E90 E92) Forum
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STETT Performance Cold Air Intake vs. Dual Cone Intakes **AIT Analysis**
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05-15-2009, 01:02 PM | #45 |
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It is more difficult, but my DIY in the other section should make it easy. Really it still is only 1 - 1 1/2 hours for a moderately skilled installer.
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05-15-2009, 01:03 PM | #46 |
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I think what Former_Boosted_IS's testing tells us is that open-hood, huge fan blowing dyno testing vs. "real-world" street drive testing will yield completely different results.
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05-15-2009, 01:04 PM | #47 |
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Ok. So, like 2-3 hours for me then...ha ha. Thanks.
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05-15-2009, 01:39 PM | #48 |
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Has this really been proven though? yes, I know the dci's show gains over the stock box on the dyno, but with several people running in the 11's and low 12's on the stock airbox it may not be as restrictive as some say it is (mainly those selling aftermarket intakes) There has been alot of feedback from those who went from dci back to stock and felt more power, including myself..would be interesting to see..
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05-15-2009, 03:12 PM | #49 | |
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Regardless, we have a ton of info that we never had before. |
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05-15-2009, 06:47 PM | #51 | ||
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Nice work Former_Boosted_IS! |
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05-18-2009, 05:07 AM | #52 | |
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05-18-2009, 06:12 AM | #53 |
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I'm impressed from the detailed review of the "Former_Boosted_IS" . That was very impressive.
Do not take me wrong that I believe Vendors should have all these comparisson tests made in the first place and not the "end-users".
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05-18-2009, 06:26 PM | #54 | |
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05-19-2009, 04:54 AM | #55 |
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It is ok. Sometimes vendors numbers don't seem to match end user results. There are intakes that starts with the letter "I" and "A" that have shown nothing but a loss in power, yet the company claimed 20 rwhp. I think relying on our own independent testing is always going to be the most reliable.
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05-19-2009, 05:03 AM | #56 | |
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Second, be careful basing your decision on 1/4 results. Things like skill level, wheel weight, tires, etc. all affect things enormously. My testing was simple and repeatable by anyone. I was not testing what is faster, but what will allow you to produce the most power and most consistent power. If the flow is equal and the air is colder, then if all else equal you will be faster. |
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05-19-2009, 09:59 AM | #57 |
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sorry for the noob question but have we proven that air flow is equal between the CAI and DCI. It seems like we might have, in a round about way, proven this, yes?
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05-19-2009, 10:01 AM | #58 |
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Not a noob question. We determined the JB3 did not cut boost in the high rpms. If there was a flow issue with the CAI, then the JB3 will detect it and reduce boost. Those are the facts that we know on this issue.
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05-19-2009, 10:41 AM | #59 |
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AIT and IAT is the same shit right? lol
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05-19-2009, 10:42 AM | #60 |
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06-05-2009, 08:30 AM | #61 |
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When looking at the above, it appears the DCI pulls were longer; there are more data points during the pulls. The primary difference I see is that begining temperatures are different which would be expected and more dramatic in stop and go traffic. At WOT and at speed, the engine bay air volume is replaced in less than a second. The replenishing air comes from outside the engine at a high speed so the differences would be minimal here. But as mention, in low speed situation, the starting temperatures would be different. Any chance you measured boost as well as solenoid duty cycle? I would like to see what the relative airflow was. Nevertheless, I may pick up this intake as summer dropped on us quickly and the traffic heat soak is noticeable. |
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06-05-2009, 09:19 AM | #62 | |
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I didn't measure boost because it is a null value since the JB is manipulating it. I didn't measure solenoid duty cycle, but since the JB3 dynamically adjusts boost we would see the difference in a boost drop off at high RPMs. |
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06-05-2009, 09:29 AM | #63 | |
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I thought it was a long shot as you would have to externally tap into the solenoid signals with a duty cycle monitor when runnign the JB3. The PROcede does have duty cycle output available as a data logging channel. It would be interesting to see though. Considering if both ran the same boost but with one requiring more duty cycle, you could conclude one was more free flowing. That said, I doubt there would be any measureable difference at all in this regard. Looks like I have found my next purchase though... |
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06-05-2009, 09:38 AM | #64 | |
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DCI FATs style time = 7.69 seconds STETT CAI FATs style time = 7.47 seconds I am glad I was able to help. I suspect it would be a cake walk install for you, but if you have any questions just drop me a pm. |
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10-26-2009, 07:03 AM | #66 |
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