Cold air intake. Before & after.

[1994_4x4]

The cold air intake was a success. Approximately 360 degrees of plumbing was removed, the intake has a straight shot to the throttle body. This also eliminated multiple restrictions: hot air valve, deteriorating pre-filter plumbing, intake air muffler, etc. I'm sure the increased filter size helps too. MPG and power both went up. MPG boost caught me off-guard as I thought the colder air would equal more throttle loss.

 

[adsm08]

That's a nice looking hot air intake you have there.

 

[shane96ranger]

Yeah, you've made yourself a hot air intake. You did have a cold air intake.

 

[1994_4x4]

Correction: Hot air intake.

That may explain why my mileage didn't sink. I may try for a set up that won't suck hot engine bay air in the future.

 

[Mazda]

Should have went with something a little bit like this.

This was only on my truck for about a year or so. Was helping my brother out with a test fit when he was working for a company that makes Mustang performance parts here in Temecula,Ca.

Didn't see any Hp or Fuel savings at all really. Oh what you cant see is the duct work from the two holes in the valance up to the cone filter.

Bryan

Pics not showing up:

http://s1295.beta.photobucket.com/u...rt=3&o=2&_suid=136330445942104606755223017714

http://s1295.beta.photobucket.com/u...t=3&o=1&_suid=1363304262015015814372496111267

 

[1994_4x4]

That is nice. Where did you acquire the plumbing for that? I need something like that.

The parts I used were laying around. If you look closely at my pictures it's just all junk yard parts. The extra MAF sensor is from a 1995 Explorer and I'm not sure where the K&N and extra parts to adapt it all came from.

 

[Bob Ayers]

That's a nice looking hot air intake you have there.

Yeah, you've made yourself a hot air intake. You did have a cold air intake.

That may explain why my mileage didn't sink. I may try for a set up that won't suck hot engine bay air in the future.

You were successful in screwing up an efficient OEM cold air intake! Your 4 cylinder uses the same air filter as the 3.0L and 4.0L V-6 engines, which pull much more air than the 4 cylinder. Since the air filter is way over designed for the 4 cylinder (and V-6's B.T.W.) the only thing you gain with your setup is noise, which comes from air turbulence, and not desirable.

 

[EMB1230]

You were successful in screwing up an efficient OEM cold air intake! Your 4 cylinder uses the same air filter as the 3.0L and 4.0L V-6 engines, which pull much more air than the 4 cylinder. Since the air filter is way over designed for the 4 cylinder (and V-6's B.T.W.) the only thing you gain with your setup is noise, which comes from air turbulence, and not desirable.

You mean the 1995-97 cone-shaped bullet-nosed style or do you mean for all years? BTW anyone else noticed how the 1995-2000 4.0's had a much larger diameter intake tubing? They look HUGE compared to the 2.3/2.5 and 3.0's intake tubes, lol. 2001+ 4.0's switched to a smaller diameter (and much shorter) intake tube.

 

[Bob Ayers]

You mean the 1995-97 cone-shaped bullet-nosed style or do you mean for all years? BTW anyone else noticed how the 1995-2000 4.0's had a much larger diameter intake tubing? They look HUGE compared to the 2.3/2.5 and 3.0's intake tubes, lol. 2001+ 4.0's switched to a smaller diameter (and much shorter) intake tube.

No, I'm talking about the OEM paper panel air filters.

You won't get any more air flow with a larger intake tube. The only change will be a lower air velocity, which screws up the transfer function of the MAF sensor. If the intake tube was the limiting factor for air flow, then you would get more air flow with the larger diameter intake tube.

 

[triumphrider-1]

No, I'm talking about the OEM paper panel air filters.

You won't get any more air flow with a larger intake tube. The only change will be a lower air velocity, which screws up the transfer function of the MAF sensor. If the intake tube was the limiting factor for air flow, then you would get more air flow with the larger diameter intake tube.

While true, the diameter at the cross section of the MAF is going to determine air flow across the sensor. The tubes on either side will have negligible affect on the reading.

 

[EMB1230]

No, I'm talking about the OEM paper panel air filters.

LOL, that's what I was talking about, the conical shape of the 95-97 bullet-nosed air filters did seem overly complex and unnecessary.

 

[982WDRanger]

Should re-do that

Should have measured where your stock maf was and put it back in the same place, might cause an issue. I made my own for my 4.0L and it works great. Allowed for me to free up space for a secondary battery.

[/IMG]

 

[Bob Ayers]

While true, the diameter at the cross section of the MAF is going to determine air flow across the sensor. The tubes on either side will have negligible affect on the reading.

What I'm trying to get across is not to screw with the OEM intake.

 

[1994_4x4]

You were successful in screwing up an efficient OEM cold air intake! Your 4 cylinder uses the same air filter as the 3.0L and 4.0L V-6 engines, which pull much more air than the 4 cylinder. Since the air filter is way over designed for the 4 cylinder (and V-6's B.T.W.) the only thing you gain with your setup is noise, which comes from air turbulence, and not desirable.

What I'm trying to get across is not to screw with the OEM intake.

So my truck is broke now...

Thanks for the input guys!

 

[adsm08]

While true, the diameter at the cross section of the MAF is going to determine air flow across the sensor. The tubes on either side will have negligible affect on the reading.

While this is true the problem with most of these "CAI" setups is that they change the diameter of the tube across the board. Since the MAF is not sampling all of the air coming through the tube, and is calibrated to take a percentage sample (usually about 10%) screwing with the amount of air coming in by changing the size of the duct work changes the sample rate. Changing the sample rate changes the accuracy of the air/fuel calculations, which in turn can cause drive-ability issues, generally resulting in a lean condition.

So my truck is broke now...

Thanks for the input guys!

Meh. I wouldn't go that far yet. At the very least it is not any better than it was stock. The big thing to remember is that intake system mods can help when done correctly, but to really get any useable benefits you have to mod the head and exhaust to be able to keep up with the flow. It's a system, not a pile of parts.