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02-26-2013, 06:38 PM | #67 | |
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Bottom is 2 to 3 times dirtier than top every time I change it |
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03-07-2013, 06:54 PM | #68 |
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hey I need a filter and been looking at various offerings from Dinan, MS, AA, etc.
Maybe a dumb question but since you can't see it why does the color matter? So no one runs open air elements anymore? Is the Dinan setup include a different airbox of still just a drop in? Would like to order one this week! Will teaming this up with RPI scoops help?
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03-07-2013, 09:27 PM | #69 |
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No discount for real fans 😃
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03-08-2013, 04:25 PM | #70 | |
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The scoops positively do (basically, see below) nothing. It is physically impossible for them to generate a "ram air" effect with this intake design. The only possible benefit would be less heat soak due to more air flow THROUGH (i.e. from the scoops, through the box, up and out of the hood vent) the box. Any purported dyno "gains" are from "fudging" the numbers. The quoted "gains" are within the accepted variance of the dyno. Pick and choose the right runs and voila, gains. Do enough runs and average them all, I bet you'd see zero gains.
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03-08-2013, 06:31 PM | #71 |
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I've never seen any objective data to suggest there was any measurable HP gain by using a K&N filter.
I have seen anectdotal evidence over ten years of owning a BMW of people gumming up their MAF sensor by over-oiling. I have always used, and believe in, only genuine OEM filters for my cars. YMMV of course. Just my 0.02.
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03-12-2013, 08:01 PM | #72 | |
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03-13-2013, 04:22 PM | #74 |
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Your 2009 MY is in the category that will get the most benefits from changing the filter (by getting rid of that charcoal liner). However, 2-5hp is not something you will obviously notice from the seat of the pants. But all the small improvements combined together do eventually add up.
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03-13-2013, 09:23 PM | #75 | |
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Last edited by coogs08; 03-13-2013 at 09:43 PM.. |
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04-04-2013, 08:56 AM | #77 |
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I have a KN, its awesome, no vibrations. Sounds a bit better. The car felt slightly more responsive but then again I did have a dirty stock filter. I bought it when Advanced auto had a sale and it was 55 bucks.
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