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

[tinik]

Originally Posted by UnSub

The filter is pretty non restictive. There is no cleaning ever required. You won't gain anything taking it out except adding to pollution. I accidentally took it out of my 4 Runner while trying to figure out what it was. It was too messed up to put it back in. I checked my 03 Tundra and it has one but I left it in. You never know when emmissions testing will get tighter.

what is emmissions? never heard of that one - LOL
(here in FL we don't have that)

[UnSub]

Originally Posted by tinik

what is emmissions? never heard of that one - LOL
(here in FL we don't have that)

Opps. I spelled it wrong! Emissions. Is that right? I spell badly but I smell O.K.Watch those gators tinik

[Tundrav8yamaha]

Originally Posted by BAD BONEZ BJ

Nice write-up. I can't tell you if the '03 has this or not as my stock airbox is in the top of the shed, at the back, about a half-day of moving crap to get to it. So one of the other '03s will have to look and see if this is in their airbox. Maybe it came out with the VVTI engines?
BJ

Mine has that on top of the filter box (2004)...

[Gman1985]

what if ur arm dont fit in the whole hehehe...

[duffyatkinson]

All that carbon filter does is attempt to capture the blow-by and combustion byproducts that seep back into the intake system after the engine is shut down. Like everyone says, it is simply a control structure to make the environmentalists happy.

In regards to performance enhancement, unless it gets clogged with debris from a failed air filter, the thing is so coarse that I seriously doubt that it has any measurable restriction on the intake flow.

The one thing I wouldn't like about it is it traps all those nasty, acidic combustables and gases between the throttle body and the MAF sensor, so the MAF gets to sit immersed in the stuff. Not beneficial to its lifespan. Thankfully, my 2002 doesn't have it!

Other than that, those of you with 2003+ V8s, removing it will have NO effect on performance OR MPG.

[Burger Steak & Eggs]

Originally Posted by duffyatkinson

Other than that, those of you with 2003+ V8s, removing it will have NO effect on performance OR MPG.

What experiments / tests have you performed to arrive at this conclusion?

[Tundradrenalin]

Originally Posted by Burger Steak & Eggs

What experiments / tests have you performed to arrive at this conclusion?

I can offer my experiments here. Ran two tanks of gas, did not notice any performance increase at any RPM and the Scangauge did not notice any MPG increase. So I put it back in.

edit: i did not do a dyno.

[Burger Steak & Eggs]

I can believe it does not improve mileage because, even though it presents a restriction in the intake tract, that restriction tends towards zero as the throttle gets closer to being closed. People run as little throttle as possible when trying to get good fuel economy. For performance however, the likelihood of the removal making a difference is greater, as the restriction becomes more significant at heavier throttle. If you are breathing through a straw, you will be more hampered by the restriction when you are running as fast as you can as opposed to laying on the sofa.

Here is what Gen 1 owners noticed after removing their filters.

Stock Air Flow Numbers and Mod

[Tundradrenalin]

I've had the same semi-ram air going for a while, over a year? I dunno.
Your rationale sounds reasonable to me though.

[duffyatkinson]

Originally Posted by Burger Steak & Eggs

What experiments / tests have you performed to arrive at this conclusion?

Burger~

It's a gas trap, not a constrained filter. Your argument holds water logically, but, like you said, IF there is any effect, it would only show at WOT. Even then, you'd be hard-pressed to see a differential that was meaningful.

But, be my guest if you want to do all the dyno work, scanguage staring, etc. Frankly, I think it is a waste of time to get all bound up over a MPG or two on a tank of gas. If we were all THAT worried, we'd be driving Prius'!!

[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.

[duffyatkinson]

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.

Tundradrenalin~

I look forward to your results!

DEA

[Burger Steak & Eggs]

Originally Posted by duffyatkinson

Burger~

It's a gas trap, not a constrained filter. Your argument holds water logically, but, like you said, IF there is any effect, it would only show at WOT. Even then, you'd be hard-pressed to see a differential that was meaningful.

But, be my guest if you want to do all the dyno work, scanguage staring, etc. Frankly, I think it is a waste of time to get all bound up over a MPG or two on a tank of gas. If we were all THAT worried, we'd be driving Prius'!!

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...

[Tundrav8yamaha]

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...

Horsepower is nothing unless apply right personally this mod is a joke because there is a reason why it's there in the first place.. As with any mod you tend to beleive the studies but is there enought proof to state you get better Mpg having this?

As My post before stated Before someone axed it Hybrid's very likely is the next generation to go Prius ,camry and the Highlander Hybrid will be the next direction hopefully Toyota get do that on a Tundra GM has a 2 stage hybrid now . When it comes to the Tundra let's face it people this Truck is heavy and has a Larger displacement v8 whos overall Fuel ecomony is very questionable but isn't that why we all got a truck in the first place to tow yet have power. Hell In California Tundra there have 3 cat's used for emmission purposes so before we all hack into carbon filters it's best to retain them since they have a soul purpose to clean (back to topic)

Erik