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Dual Cone Filters with JB+
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08-04-2009, 03:42 AM | #23 |
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It is just to make the dyno run with open hood, which will provide the sufficient air supply.
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08-04-2009, 03:51 AM | #24 | |
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You can't imagine how high the temperature can be under the hood while driving at low speeds. Opening the hood makes the test totally misleading. Last edited by Big Tom; 08-04-2009 at 04:09 AM.. |
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08-04-2009, 04:38 AM | #26 | |
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I don't take it so often (never) to the race way for a couple of 1/4 mile-pulls. It's how the cars works IRL that matters to me. |
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08-04-2009, 05:23 AM | #27 | |
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08-04-2009, 05:37 AM | #28 |
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08-04-2009, 05:38 AM | #29 | |
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08-04-2009, 06:17 AM | #31 | |
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The problem with this debate is that most don't really understand or care to understand the physics involved beyond "hot air is bad". The high flow intakes are used by all tuners because of their reduction of boost solenoid duty cycle at higher boost levels. They are safer for the compressors and generate a lot more power. Mike |
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08-04-2009, 06:17 AM | #32 |
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DCI's at WOT are sucking in 20x the amount of air within your engine bay per second... plus 95% of the cooling occurs at the intercooler, so hotter intake temps at the DCI is not an issue. There is maths to back this up, it has been posted on here before.
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08-04-2009, 06:43 AM | #33 | |
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59F (15C) lower AIT at the same ambient conditions with a heat shield mounted, measured after the IC... Why do you think so many tuning companies are selling heat shields with their open filter systems to other car brands? Why do you think the BMW engineers placed the cold air intake to the OEM filterbox? And why do you think BMW has developed the "BMW Performance Air Intake System"?: http://www.bmwusa.com/Standard/Conte...akeSystem.aspx Not just for the fun, believe me on that. Last edited by Big Tom; 08-04-2009 at 07:38 AM.. |
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08-04-2009, 01:42 PM | #34 | |
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08-04-2009, 06:25 PM | #35 | |
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Earlier Car: 2004 STi (got stolen) Earlier Earlier Car: 1995 Mustang GT (416 whp and a blown engine) Really Much Earlier Car: 1988 Mazda 626 TURBO |
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08-04-2009, 06:44 PM | #36 | |
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08-04-2009, 07:30 PM | #37 |
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This was using a Stage 2 tune at 13-14psi. From 5000-redline (where you are during a 1/4 mile pull) the average pickup is 10-12whp under the curve. With the newer tunes holding more boost to redline, the gains are even higher.
Mike |
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08-08-2009, 03:07 AM | #39 | |
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Please do notice that the test in the link was performed with an upgraded IC... Imagine what would happen with the stock one. |
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08-08-2009, 07:04 AM | #40 |
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You can see the heat soak in the IAT graph... Id say the DCI is great for the drag strip. Run 1/4, pull car down return, park, lift hood and cool... Repeat.
For DD, road, autox, etc etc, a true CAI or stock box is better it seems. DCI may even be better in the winter? It all depends on what your IAT's are. |
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08-08-2009, 02:01 PM | #41 | |
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http://www.e90post.com/forums/showthread.php?t=290093 Mike |
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08-08-2009, 02:22 PM | #42 | |
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"Each of these represent the best out of 2-3 runs in each configuration." ...and you would have realised that this test has nothing to do with the heat soak-issue that will appear with the DCI's mounted on the engine after a couple of WOT's. The reason for this is because he chose to compare the best results from each run. The discussion is about consistent power, and not about top effect! The test Mr. 5 did shows what will happen IRL. That's it. Last edited by Big Tom; 08-08-2009 at 04:40 PM.. |
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08-08-2009, 04:44 PM | #43 | |
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Mike |
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08-08-2009, 05:38 PM | #44 |
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I see a couple people being disrespectful here and it isn't the vendor.
Why is it you guys need to defend your positions by being so aggressive? You don't win an argument by being an ahole. Anyway, from what I gather... the guys arguing against the DCI are the ones that have never used it. Get some experience with the mod then make a judgement. I don't hear a lot of guys that own DCI's saying "OMG Its so hot that I had to put my stock airbox back on." Shrug, to each their own. Personally, I love my DCI and have no intentions of going back to the stock box.
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