3rd Gen Air Box Mod

[EXPLORER04]

I drilled about 1/3" holes on my Airbox, probably about 20 total. I was going to bore them bigger and add more, but I might just do something like this:

why not do something like this, you get much better results.
(dead links)

 

[Jager]

Is that a Universal K&N running on a PVC pipe? I am just trying to not spend money really.

 

[EXPLORER04]

Is that a Universal K&N running on a PVC pipe? I am just trying to not spend money really.

no, its a weapon r intake system

 

[Jager]

How much did that run you? Did you have to do much modifications to it or was it simply bolt-on.

 

[CALDWELL]

What did you do for a MAF ?

part an 02-03 ??

I really wanna know how you made this work, because you will make alot of people happy on this forum fella !!!

 

[Jager]

Just enlarged the holes to 1.5". Got a mesh backing (like screen door, a bit thicker), and covered the hole openings, cause I offroad a lot and would rather not have to replace the air filter after every session. Still stuck with the stock paper filter. I did however notice a huge difference with the larger holes. Better throttle response, deeper tone around 3-4k RPM and a slight vibration (feels good, not a sketchy vibration).

Still trying to find a K&N filter to relatively cheap. Would be nice to be able to clean and re-oil the filter rather than replace (paper filter)

 

[CALDWELL]

EXPLORER04...

Help us out dude ! tell us how you made the weapon r intake work. you will make alot of people happy...

Jager the standard price for a K&N filter is going to be like 40-60$ depending on where you live so idk if you will find one " cheap "

 

[Jager]

Nah I don't mean dirt cheap, just hoping to find a "steal" somewhere. lol.

 

[mcmchammer]

EXPLORER04...
Help us out dude ! tell us how you made the weapon r intake work. you will make alot of people happy...

I second this. It looks awesome (let alone the performance boost), but I want to know how you got around the MAF problem. Please share your secrets .

 

[trucku]

If you use a scanguage you will see that your air intake temp will get very high. High ambient air temps and even your AC will get you easily over 150degrees intake air. That is not so good for mileage and performance. The 3rd gens don't have the greatest under hood airflow. Originally the 3rd gens box pulls cold air from behind the headlight. I think it would be better to mod the box on the right to suck in cold air from behind your right quarter panel and not from a hot engine bay.

 

[EXPLORER04]

i never knew that there was a difference between model years on how the maf was installed. What i did to make my cai work was to take the original top from the airbox and cut of the little tube that contained the maf sensor and mounting hole. Here is a larger picture of the cai. If you want any other pics, just let me know.
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[CALDWELL]

does the weapon r intake piping have enough length to reach the factory air box ?? cause it just seems a little short...


I may just try to pull off something like the ( 05-06 ) TUNDRA K&N INTAKE...

(dead links)

 

[kstrayhorn]

oops, didn't notice a pg. 2

please excuse my ignorance.

 

[Deleted member 128963]

CAI and temperature effects.

If you use a scanguage you will see that your air intake temp will get very high. High ambient air temps and even your AC will get you easily over 150degrees intake air. That is not so good for mileage and performance. The 3rd gens don't have the greatest under hood airflow. Originally the 3rd gens box pulls cold air from behind the headlight. I think it would be better to mod the box on the right to suck in cold air from behind your right quarter panel and not from a hot engine bay.

I have to agree with this. I found an online Engine Horsepower Calculator and you can plug in "The actual air density, relative air density (RAD), density altitude and virtual temperature are all calculated, in addition to the SAE J1349 relative horsepower." I placed my oven thermometer between the air box and Power Distribution Box in my '94 Ex and after driving around town for 20 minutes it showed the temp around the air box to be 145 degrees F.
Here is the link to the online calculator:
(dead links)

I also found an interesting air box mod that I am going to try at:
Air Box Modification at www.ford40.com, for the Ford 4.0 4L Engine Modifications for Ranger, Sporttrac & Explorer

This guy has some interesting links and information. I sent him an email and invited him to come join in the discussions here.

I have not yet worked out the math manually so I'm not sure that these calculators are providing valid info, but for my temp and humidity conditions here today, taking in 85 degree air at 75% relative humidity as opposed to the 140 degree engine compartment air showed a 98% relative HP output compared to 80.3% at 140 degrees.

 

[2000StreetRod]

thanks for the link!

I have to agree with this. I found an online Engine Horsepower Calculator and you can plug in "The actual air density, relative air density (RAD), density altitude and virtual temperature are all calculated, in addition to the SAE J1349 relative horsepower." I placed my oven thermometer between the air box and Power Distribution Box in my '94 Ex and after driving around town for 20 minutes it showed the temp around the air box to be 145 degrees F.
Here is the link to the online calculator:
(dead links)
Thanks for posting this very useful link!

When I replaced my stock MAF sensor with a Lightning 90mm MAF sensor I also converted to a matching 4 inch diameter main intake tube and Spectre cone air filter. I was concerned about the cone filter drawing warm air from the engine compartment unlike the stock filter that draws air from an opening behind the headlight. A while back I performed a data log to determine the impact.

The engine was cold started with an ambient air temperature of 74 degrees and the same intake air temperature (IAT). By the time I had backed out of the driveway a minute later the IAT had already increased to 78 degrees. I noticed from the data log that once the engine was fully warmed up the IAT would drop to about 3 degrees above ambient after driving above 35 mph for about 70 seconds. I also noticed that when stopped at a traffic light the IAT would steadily increase to 100 degrees in about 75 seconds.

 

[93explodersport]

did this mod. increased power and i love the growl from 3k to 4k rpm. also added K&N drop in filter. also noticed MPG increase of about 1-2 mpg

 

[bjboertje]

explorer04 <--- needs to check his coolant level.

 

[GreenEyez]

All these talks about increased air temp make me a little worried about putting a kkm intake in.

 

[n.gardner]

I just did this to my 02 xls works nicely

 

[Skip01]

Just finished mine a sec ago and went too Autozone and picked up a K&N, nice lil growl underhood....and some nice pickup on the butt dyno