Is too much air flow no good? - Ford Powerstroke Diesel Forum
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post #1 of 7 Old 08-12-2008, 03:49 PM Thread Starter
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Is too much air flow no good?

Have 04 Excursion with 6.0 and a K&N oval filter. Was getting decent mpg. Changed back to stock filter and cut out a 3" circle behind grille for more air flow. Went back to K&N for better mpg than stock filter. This time I did not cover up hole drilled for stock filter. You can actually see through grille and thru radiator brace and see filter. I figured that more air flow through the hole drilled would be good with the K&N filter. This is where it gets confusing. I get a couple less mpg leaving hole opened rather when there was no hole. I thought the more air flow the better the efficiency:icon:????????_ford
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post #2 of 7 Old 08-12-2008, 07:49 PM
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6.0

the stock filter is good for 400 or 450hp.the k&N is not a good filter.you will sand blast your wheel.afe,airaid,tru-flow,anything but k&n.fresh air is good.
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post #3 of 7 Old 08-13-2008, 07:28 AM Thread Starter
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Thank you for reply. Can you explain what you meant by "will sand blast your wheel". and what is afe,airraid, truflow? Are these brand names. My goalis better MPG. I found that hard to do with stock filter. When I went to 4" ehaust from the down pipe back and remove kitty, and installed flow tru muffler with K&N I found to get better MPG. What is it that you do not like about K&N? Thank you for your reply.
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post #4 of 7 Old 08-13-2008, 07:46 AM
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people around here say that the k&n will let dirt thru because it doesnt seal properly and you will dust your turbo those were other brands that he listed

2008 F250 6.4 CC SB Fx4
Gearhead tunes, flopro exhaust,AFe intake
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post #5 of 7 Old 08-13-2008, 11:48 AM
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k/n

well the best thing to do with that K/N is find the trash can and put it in it.before you dust your turbo and so on.
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post #6 of 7 Old 08-24-2008, 06:52 PM
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wonder why that is? i have k&n's on everything.except my X. but ihave ran them for years on atvs and stuff with problems

2003 excursion

6.0 psd baby!!

100% stock for now.

clean oasis report. not a single item till now.

76,000 miles when i bought it.

needed 2 injectors, y pipe, lower rad hose, egr valve.

now has 82,000 miles.

lovin every min of it
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post #7 of 7 Old 08-24-2008, 07:58 PM
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Quote:
Originally Posted by GnFnRs View Post
wonder why that is? i have k&n's on everything.except my X. but ihave ran them for years on atvs and stuff with problems
Did you mean that or was that a Freudian slip?


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NC State law defines biodiesel as ''any fuel or mixture of fuels derived in whole or in part from agricultural products or animal fats or wastes from these products or fats.''
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