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Just Damn! :zx11pisse I not only put an aftermarket on my '04 F-250 SD early this year, I put a stinkin' K & N on it to boot! :evil:

NR, you continue to amaze and inform like no other. Thanks for the education! :You_Rock_
 

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I have a good friend (who of course has a friend) - they are 'hot rodders'. He tells me his buddy sends his oil out to a lab for analysis at each oil change. Has been tracking different info and that when the K&N is on the vehicle, the oil has much more particle saturation.....

food for thought I think
or, maybe..just the price we pay thinking our mods are better than the manufacturers OEM product?
 

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am i wrong in assuming that even though the k&n filter doesnt filter as much as other filters...less restriction=more air=more horse power? so just like any hp upgrading modification, some risks are involved....?
 

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The question JP is how much of that air is being used. I think Hennessy is the most honest saying that is Ram Air setup gains him nothing on a dyno, but he hopes will get him power at speed because of how a ram air intake works. The others aren't ram air, so that leads me to believe they do little or nothing.
 

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The other risk with filters like the K & N is the increased amount of particles that pass through the filter. Over time they can do damage. I know Diesel owners (F Series Fords) that have stopped using K & N's because the potential damage far outweighs the few benifits. One guy even had to get his engine serviced because the particles had started to do damage to the innards of the engine.

So. Would going middle of the road, from that example a WIX be the best option then? Small amounts of particles pass through, better airflow, and OK lifespan?
 

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Discussion Starter · #9 ·
Another series of tests done by another car forum, proved that on a stock Hemi 5.7 litre engine, aftermarket air systems showed no dyno improvements over Chrysler's stock air system (which has a lower air pickup already).

I appears that looks and sound are the only benefits on a stock engine. What is worrisome is the degradation of filtering ability of the oiled filters.
 

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rbb2000 said:
So much for you get what you pay for? K & N I take from that article is just hype then?
The new K&N had a restriction of 4.5in H2O while the Delco was 6.23in H20.

One atmosphere (ATM or 14.7 psi) = 406.782450845 in H2O

6.23 - 4.5 = 1.73in H2O of vacuum

or .425% less pressure drop available to the motor.

With all things being equal(and scaling up to a larger filter) the K&N would give you about a 2HP gain at SRT-8 WOT power levels.
In the comparison those extra 2HP would be at the cost of allowing 18 times the dirt into your engine.
 

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That puts it in perspective nicely! :)
 

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Wow NR, you may have read I am going back to the stock intake because I am looking for more quiet. Are you suggesting I get the AC filter or is the stock Mopar adequate?
 

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That study was for DuraMax (GM Diesel) engines thus the AC Delco comparison. I'm guessing one can corelate that the AC Delco = OEM Filter
 

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Discussion Starter · #15 ·
II kings 9:20 said:
Wow NR, you may have read I am going back to the stock intake because I am looking for more quiet. Are you suggesting I get the AC filter or is the stock Mopar adequate?
Mopar is just as good as ACDelco. The manufacturers have been cautioning against oiled filters for some time now. I guess they were right.

I think I will go back to stock, as well.
 

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Reconsideration...K&N always worked in the past

After thinking it over..I'm going to stick with K& N ,at least for awhile. The filter has always worked well for me,plus I love "the sound"....Whoa...
 

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i love k&n filter it works great... more power
 

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The TrueFlow drop in filter had impressive results on thier website, they use to have a video showing K&N, papar and thier oiled foam. The video showed huge differences in particulate pass through with thier foam filter. That video is no longer on thier site. They claim by having media 16 times thicker than paper they trap more and even when dirty provides better flow. I have a TrueFlow in the garage, I still think I'll go with stock.
 

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As for K&N, I got 10 years and 192,000 miles out of my '94 Concord 3.5L with no problems what so ever running the K&N the whole time. I was very apprehensive about trading her in since she was still running so well but all was soon forgotten with the new 300c in the garage.

With my wife’s car (’05 Chevy Equinox), it had a thick, slightly pleated, plain cotton (not oiled) type removable filter with a permanent ¼” fiberglass mesh charcoal filter attached to the top of the airbox. What is that all about?!? Does the engine really benefit from fresh, odor-free air?
 

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Deep Lava said:
With my wife’s car (’05 Chevy Equinox), it had a thick, slightly pleated, plain cotton (not oiled) type removable filter with a permanent ¼” fiberglass mesh charcoal filter attached to the top of the airbox. What is that all about?!? Does the engine really benefit from fresh, odor-free air?
You sure you aren't looking at an interior air filter??
 
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