DIY Article How-To: Removing Carbon Filter w/o Damaging It

[duffyatkinson]

Originally Posted by Burger Steak & Eggs

Have a read through the link I gave. Hi_Volt was able to measure a pressure difference in front of and behind his HC filter due to the restriction it presents.

I hear you about the magnitude of the difference, but if you are addicted to horsepower as I am...

I did read that thread when he first posted. It was excellent. However, his model Tundra (2001) does not have the carbon filter screen. It didn't come out until 2003. I think his tests were comparing vacuum before and after his stock air filter. (Or did I miss something...?)

DEA

[Burger Steak & Eggs]

Originally Posted by duffyatkinson

I did read that thread when he first posted. It was excellent. However, his model Tundra (2001) does not have the carbon filter screen. It didn't come out until 2003. I think his tests were comparing vacuum before and after his stock air filter. (Or did I miss something...?)

DEA

Whoops, you are right, he got his gains with the extra hose and K&N. It should also be noted I did the same mods as he did, which suggests the three tenths I gained at the dragstrip needs to be at least partly credited to the K&N.

[Tundradrenalin]

Originally Posted by Tundradrenalin

In the next couple of weeks I'm having my URD MAF calibrator tuned, not by myself. During the tuning sessions I'll ask if we can pop it out and see what the MAF sensor reads and compare the two (installed & un-installed). That should clear the water.

hi all.
no difference in/out.
The truck is smokin' now that it's been custom tuned. No more slow shifts, no more hesitation between gears, allll smooth fast acceleration allll the way.

URD MAF Calibrator highly recommended. It's like my Tundra was born again!

[toyotakid1996]

Originally Posted by Tundradrenalin

hi all.
no difference in/out.
The truck is smokin' now that it's been custom tuned. No more slow shifts, no more hesitation between gears, allll smooth fast acceleration allll the way.

URD MAF Calibrator highly recommended. It's like my Tundra was born again!

Who do you reccommend going to to have this done?

[HOGWILD]

So why does this carbon filter exist? Seems it is there for a reason and the reason being it absorbs unburnt hydrocarbons during engine shutdown so how could it being removed increase performance? not sure what it will do to MAF or any other part of intake but Toyota put it there for this reason? Guess most feel it's not needed and there is some kinda gain by removing it? So what does it do when ya remove it?

[Marauder]

First....Its NOT a filter. its a hydrocarbon trap. If your airbox has a white stamp lettering of " HC " then you have it.

Second...they don't really restrict anything, much less than a air filter. Its job is similar to a cat converter, in that it uses a chemical reaction to stop any hydrocarbons from getting out of the engine and into the air. Yes, its an emissions device!!

So if you are using a stock type air filter, or something that isn't extremely high-flow, then this is just a waste of energy, IMO.