Air Intake System - Ford Powerstroke Diesel Forum

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post #1 of 16 Old 05-14-2006, 08:35 AM Thread Starter
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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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post #2 of 16 Old 05-14-2006, 01:13 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.

'96 F250 4x4 Ext Cab, 5 speed. K&N FIPK - modified to use 6637; 3" downpipe, 6" stack; Beans modded IDM; Beans stage 2s; shimmed FPR; exhaust brake; 6 position TS; locked 4.10s
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post #3 of 16 Old 05-14-2006, 01:36 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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post #4 of 16 Old 05-14-2006, 05:32 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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post #5 of 16 Old 05-14-2006, 06:28 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.

2005 F350 XLT FX4. 2.5" leveling kit, 03 turbo, 4" MBRP Turbo-back, 58v FICM, SCT X4, Irate Diesel coolant filter
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post #6 of 16 Old 05-14-2006, 06:34 PM
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Sounds like I need to get rid of the K&N.

'99 Ford F-350 crew cab, dually, 2x4, Banks Monster Exhaust-muffler deleted, Banks Six Gun Tuner, , TS performance 6 position chip stk, Hi idle, 50, 75, 100, 140, Banks Transcommand, wastegate mod, Map Sensor Fix from SP Diesel, Zex Diesel Nitrous kit with purge, bottle heater, and blow down, next step---H2E, need to install- bully dog shift kit, 6.0 intercooler
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post #7 of 16 Old 05-14-2006, 06:38 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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post #8 of 16 Old 05-14-2006, 06:54 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.

'99 Ford F-350 crew cab, dually, 2x4, Banks Monster Exhaust-muffler deleted, Banks Six Gun Tuner, , TS performance 6 position chip stk, Hi idle, 50, 75, 100, 140, Banks Transcommand, wastegate mod, Map Sensor Fix from SP Diesel, Zex Diesel Nitrous kit with purge, bottle heater, and blow down, next step---H2E, need to install- bully dog shift kit, 6.0 intercooler
http://www.fcrsuspension.com
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post #9 of 16 Old 05-14-2006, 06:58 PM
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I'm thinking of dumping my K&N in favor of the 6637.

'96 F250 4x4 Ext Cab, 5 speed. K&N FIPK - modified to use 6637; 3" downpipe, 6" stack; Beans modded IDM; Beans stage 2s; shimmed FPR; exhaust brake; 6 position TS; locked 4.10s
'93 F250 4x4 regular cab long box. 7.3IDI nonturbo/E4OD 8' Western. STAYING STOCK
'65 Pontiac Tempest, 406ci chevy small block, TH350 with shift kit, 2700 stall converter.
'01 HD XL1200S - Lots of Screamin Eagle goodies
'96 Tbird LX V8

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post #10 of 16 Old 05-14-2006, 10:51 PM
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highly recommended.

2005 F350 XLT FX4. 2.5" leveling kit, 03 turbo, 4" MBRP Turbo-back, 58v FICM, SCT X4, Irate Diesel coolant filter
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