Air Intake System - Ford Powerstroke Diesel Forum
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Old 05-14-2006, 09:35 AM
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Air Intake System

Hello, I'm thinking about putting an air intake system on my 1999 F-350 powerstroke. crewcab, 4WD. I currently have an older 6 position chip installed that will give me 75 h.p. more max. I also have a regular K&N filter in it. I want to know if the air intake system is worth the money? I mainly am looking at ways to get a little better fuel milage. I'm getting between 16-19 mpg now, if I keep my foot out of it. Will the air intake system help, and if so, what is the best choice? Thanks for your help. David Sizelove
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Old 05-14-2006, 02:13 PM
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I'd go ahead and do the intake, using the Donaldson 6637 filter. I like the idea of using one of these better than a K&N or similar. I haven't had any problems with my K&N but I've heard quite a few horror stories with them letting particles through and dusting turbos and killing motors.
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Old 05-14-2006, 02:36 PM
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Intake System

I Highly Recommend The Afe Stage 2 System For Your 99 7.3. It Will Really Breath In Big Air .you Will Feel Instant Responce Up To 50hp With Just That Mod. I Changed From A K&n Filter And Was Very Impressed.you Will Also Gain 2-3mpg If You Keep Your Foot Out Of It. Enjoy.......
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Old 05-14-2006, 06:32 PM
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the bottom line is none of the aftermarket filters filter the air as well as the stock one......but the k&n filters are terrible....so yes, i would say if nothing else but for the life of hte motor......dump the k&n and go with a better filtering element......Marc
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Old 05-14-2006, 07:28 PM
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Marc's right. Put a pre-filter on if you're gonna use an aftermarket. And get rid of that K&N as fast as possible.
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Old 05-14-2006, 07:34 PM
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Sounds like I need to get rid of the K&N.
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Old 05-14-2006, 07:38 PM
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Quote:
Originally Posted by RJacks258
Sounds like I need to get rid of the K&N.
honestly rjacks....i woulnt run one on any high compression motor if k&n paid me too......they work fine on lower compression motors (most gassers)..but they can hurt a diesel over time....Marc
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Old 05-14-2006, 07:54 PM
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I just need to figure what I want, performance or longevity. I've always wanted the AFE stage II, but have seen bad things about its filtering capabilities.
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Old 05-14-2006, 07:58 PM
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I'm thinking of dumping my K&N in favor of the 6637.
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Old 05-14-2006, 11:51 PM
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highly recommended.
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