K&N CAI - Ford Powerstroke Diesel Forum
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post #1 of 26 Old 02-22-2012, 06:51 AM Thread Starter
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K&N CAI

I have a 2002 7.3L f250 running the bullydog outlook tuner, MBRP 4" exhaust, and a k&n CAI. I heard from one of my diesel techs that running a k&n CAI is not good for your diesel? Obviously you all know how expensive new CAI's are for these trucks so I wanted your opinion before I went out and spent the money. If I bought a new one, it would be an AFE pro dry s Stage 1. Is that applicable to my setup?

Thanks

2002 CCLB F350 7.3L 4x4 Lariat. Black with 2007 Tan leather interior. Mild towing tune, K&N CAI with sleeve, MBRP 4" exhaust straight pipe.
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post #2 of 26 Old 02-22-2012, 07:24 AM
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Search diy, 6637, tymar
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post #3 of 26 Old 02-22-2012, 07:33 AM
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^what he said.

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post #4 of 26 Old 02-22-2012, 08:51 AM Thread Starter
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Thanks! Any bad things about the K&N though? If it isnt bad for your diesel then I wouldnt want to replace it with a huge paper duralite intake, I need to know if anyone has had problems with them?

2002 CCLB F350 7.3L 4x4 Lariat. Black with 2007 Tan leather interior. Mild towing tune, K&N CAI with sleeve, MBRP 4" exhaust straight pipe.
Kettering University off road diesel enthusiast
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post #5 of 26 Old 02-22-2012, 09:03 AM
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You ever seen a semi with a cotton gauze filter? Ever seen one with a huge paper filter
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post #6 of 26 Old 02-22-2012, 09:06 AM
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theres nothing wrong with k&n my brother and i have used them for years no issues
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post #7 of 26 Old 02-22-2012, 09:17 AM Thread Starter
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Okay thats what I thought. I already have a good intake, no sense in the DIY. Eventually I will switch to AFE stage 2, but the money is all going into fixing the truck first.

2002 CCLB F350 7.3L 4x4 Lariat. Black with 2007 Tan leather interior. Mild towing tune, K&N CAI with sleeve, MBRP 4" exhaust straight pipe.
Kettering University off road diesel enthusiast
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post #8 of 26 Old 02-22-2012, 09:37 AM
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Quote:
Originally Posted by The Stig View Post
Okay thats what I thought. I already have a good intake, no sense in the DIY. Eventually I will switch to AFE stage 2, but the money is all going into fixing the truck first.
K&N Filters do NOT filter enough for a diesel engine. If you continue to run it, you run the risk of damaging your turbo AND engine. (Dusting.)

The problem is, the oiled cotton element dries up...and lets way too much by the filter. It's your engine. But that's a pretty damn expensive "whoops."

And a DIY-6637 is a very efficient, cheap alternative. There are many people here running them in excess of 500hp with no issues.

It's your engine.
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post #9 of 26 Old 02-22-2012, 09:38 AM
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BTW...

Update your sig.


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post #10 of 26 Old 02-22-2012, 09:42 AM Thread Starter
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Yeah that's what I have been hearing I just wanted another opinion to be sure before I bought another filter. The DIY will mount right up to my K&N filter mount I imagine so that'll be perfect, just gotta do some measurements.

Yeah I gotta update my sig and avatar, the F150 is for sale tho....
2003 Ford F150 LOW MILES

2002 CCLB F350 7.3L 4x4 Lariat. Black with 2007 Tan leather interior. Mild towing tune, K&N CAI with sleeve, MBRP 4" exhaust straight pipe.
Kettering University off road diesel enthusiast
Rush Automotive
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