I see k&n makes a oval filter with dual outlets on the filter. I think rf 1012 is the part number...might be wrong..anyway, has anyone used this with the dual intake hoses on the 5.0? Looks like out could work..or, how about 2 filters, one on each hose? Hose may not be the correct term but its been a long day. Would like a little more power..who doesn't..but I love the sound of that air being sucked into the engine under full throttle.

 

I used two of the ractive filters, and made adaptors out of tailpipe, cause i couldnt spell exaust, i also put a nipple on the adaptor for the crank breather, i went through a lot of trouble to get that exploded veiw. Summit racing has a bunch of k&n knock off filters, measure your air box outlet and maybe you can match up something. I think you can get those ricer cone filters way cheaper stateside, everything costs more in canada because of the delivery by dog sled.

 

That's kind of one idea I was thinking about. Did it work pretty well? Is there a filter made to connect to the two intake hoses or is the only option to fab something?

 

The rf1012 is the filter for the dual runners. Search the forum for rf1012. I did a couple of write ups on it.

 

for the 4.9l nothing is better than the factory air box. period.

unless your idea of better is the "cool" sound the cone filters make.

 

I know you are a 4.9l master but I would respectfully disagree because I am not as much shooting for cold air as much as just plainly more air or making the process of filtering and sending air through the engine easier for the engine, not to mention the RF-1012's massive surface area difference compared to the small inlet of the factory air box.

I'm no engine know it all but it makes sense to me that the easier it is for the engine to breath and filter the air it is taking in. Science has proven that cold air is denser and therefore CAI can be superior to a filter sucking in the less dense warm air but I do think that the affects of the cold air taken in by the factory air box really is marginal compared to a Surface area increase, and less restrictions from factory plumbing.

At highway speeds on a hot summer day I see the factory airbox possibly being superior to the RF-1012 but in all reality who isn't to say that the RF-1012 is not benefiting to the cold air coming through the now empty factory air box slot.

I am not trying to be a smart *** and I am not a scientist but think I have some good inductive reasoning with my thoughts on airflow and am posting my thoughts and observations that I have experienced with my own 4.9L with mixed driving speeds and day to day operations.

Just my thoughts. If you like your factory air box, great more power to you but I am enjoying mine and I am sticking with it.

 

you can have a surface area the size of the moon, the puny TB is only going to suck in so much air at a time, and beings the 4.9l starts to float the valves at 4500rpm, the "extra" air you will be sucking in will be marginal compared to the factory air box,

now if you were running a motor reving out at 7500rpm then yes i would agree with you get more air

but with the 4.9l a good filter with the factory airbox sucking in the colder dense air is the right choice, and to top it off it is built to act as a ram air box.

 

another better choice would be a cone filter inside a sealed box that sucks air from the outside.

 

Personally I do not see the "ram air box" being very efficient at all as it is hidden behind the grille, as that was my first issue when I started my intake mods, but hey that's my opinion.

Second, the conical filters act similar to a prop engine plane as they can gather air in any which way and are less restricted to how they gather air compared to a large turbo-jet engine that has compressed air sucked/inducted through the front of it with much more restrictions for the turbine blades to gather air and they are much less efficient than that of a prop and have to spin at higher RPMS, better fuel, etc. Of course I simplified that analogy by a million but its what came to mind.

(lol sorry about the analogy, I am studying for an aeronautical engineering major)

 

I also have to disagree. The airbox is restrictive. I gained at least 3mpg with my rf1012 and noticeable power. Don't knock it til you've tried it. I know from personal experience. Less turbulence, warmer air, increased flow over the box. The 4.9 loves this setup, as do I. I could care less about intake sound. I care a hell of allot about mpg and quicker throttle response when I need it and the rf1012 gave me both.