[OldsCool]

As the title says, I'm wondering if anyone that has done an Air Filter Box Modification has actual proof it works on a stock 4th gen. Like the "Home Depot Mod" or the "Swiss Cheese Mod".

 

[N of 60]

There is more than plenty left with what the stock OEM can provide on a stock truck, so what gains could there be?

 

[Scott_Cummins_Newbe]

4th Gen on up in stock trim, air box modifications are a waste of time and money. JMO…

 

[OldsCool]

There is more than plenty left with what the stock OEM can provide on a stock truck, so what gains could there be?

That's what I'm wondering. Been watching videos on some how to's for maintenance and what not and one thing led to another. Some guys are doing all kinds of things saying it's an improvement. Kinda like the guys that punch out their mufflers. They think if it's louder, it's faster.

 

[OldsCool]

4th Gen on up in stock trim, air box modifications are a waste of time and money. JMO…

Your opinion counts. Thanks!

 

[SRich12]

Stock box is good to about 600hp. Then you need mods.


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[northstarfire0693]

Unless you do some wild mods or run crazy HP like SRich12 said. Stock is just fine.

 

[6.7L_MegaCab]

Before I replaced the stock turbo with a tow turbo, I went back and forth a few times between the S&B CAI and the stock box. Ultimately, I felt the stock box netted better fuel economy and performance.

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[H3LZSN1P3R]

Kinda like the guys that punch out their mufflers. They think if it's louder, it's faster.

there is merit to this in some applications like gas engines you want the air to go through the engine as fast as possible so usually no muffler is better slightly lol but i get what you are saying

 

[mschultz443]

do oiled air filters like K&N better or worse. I just use a fleetguard OEM air filter.

 

[Loki223]

do oiled air filters like K&N better or worse. I just use a fleetguard OEM air filter.

They are worse. they flow more air because they filter less. the only way to flow more air, while still filters properly, is to increase surface area of the filter. Stick with the OEM filter unless you have done extensive mods where you actually need more airflow

 

[OldsCool]

do oiled air filters like K&N better or worse. I just use a fleetguard OEM air filter.

I hear today's turbos will suck the oil off those filters and that's not good. But now that I've said that, I realized my turbo vanes were oily when I checked them. From the CCV Tube! Wonder how bad that is and what's going to happen now. Is there anything I should do?

 

[N of 60]

I hear today's turbos will suck the oil off those filters and that's not good. But now that I've said that, I realized my turbo vanes were oily when I checked them. From the CCV Tube! Wonder how bad that is and what's going to happen now. Is there anything I should do?

It can coat your CAC. If significant, it lowers the efficiency of the air to air exchange producing less of a delta-T which in turn makes your intake air less dense as it could be.
Pull a boot and feel around at the inlet to the cooler. If present, compare it to the outlet.

Any turbo, old or new can suck oil out of a filter. If the supply of air is not there, greater the vacuum created.

 

[Loki223]

It's been well known for a long time that K&N filters are "fine" for naturally aspirated vehicles, but they should never be used on a forced induction vehicle.

 

[OldsCool]

It can coat your CAC. If significant, it lowers the efficiency of the air to air exchange producing less of a delta-T which in turn makes your intake air less dense as it could be.
Pull a boot and feel around at the inlet to the cooler. If present, compare it to the outlet.

Any turbo, old or new can suck oil out of a filter. If the supply of air is not there, greater the vacuum created.

Thanks! I'll check the inlet and outlet tubes on the cooler when I do the EGR/Cooler Service and coolant flush. I'm hoping it's just a little bit from the CCV Filter being packed and way overdue for the service. I think (hope) it was just blow by. Since I gutted it and vented it to atmosphere I've been checking the hose end and so far it's clean. If the weather ever cooperates...

 

[David Ivory]

They are worse. they flow more air because they filter less. the only way to flow more air, while still filters properly, is to increase surface area of the filter. Stick with the OEM filter unless you have done extensive mods where you actually need more airflow

I hear today's turbos will suck the oil off those filters and that's not good. But now that I've said that, I realized my turbo vanes were oily when I checked them. From the CCV Tube! Wonder how bad that is and what's going to happen now. Is there anything I should do?

I have purchased many vehicles that had the K&N oiled filters on them. ALL OF THEM left a trail of oil and dirt into the turbo. Lack of proper maintenace is mostly the problem. OEM paper filters don't do this. I HATE those oiled ones and always throw them away.

It's been well known for a long time that K&N filters are "fine" for naturally aspirated vehicles, but they should never be used on a forced induction vehicle.

Excellent point made here, "forced induction" That REALLY helps shove more air, oil and dirt right into the turbo.