carbon filter

[pennyrilehunter]

Does anyone know what the purpose of the carbon filter that is located in the top of the stock air filter box. Looks to me like it has to reduce air flow.

thanks

[Nukedog]

Extra filtration. Mine has been out for about a week and it runs better and gets about 1mpg better.

[djb383]

If it reduced air flow, wouldn't it cause these engines to run rich? They run very lean and very clean, ULEV II. The second/upper filter catches fumes that escape from the intake/throttle body when the engine is OFF.

[pennyrilehunter]

What the heck are the fumes going to hurt when the engine isn't running? Assuming that if you remove it Toyota would probably try and void your warreny if they found out?

I'm assuming that if you replaced the factory box with a CAI it wouldn't have the carbon filter. Thinking about getting one, just have to decide on which one. Leaning towards the Volant or the AFE. Like the idea of not having to oil the filter.

[Nukedog]

Originally Posted by djb383

If it reduced air flow, wouldn't it cause these engines to run rich? They run very lean and very clean, ULEV II. The second/upper filter catches fumes that escape from the intake/throttle body when the engine is OFF.

Motorcycles are even more strict than cars for ULEV and on the dyno they are actually pig rich to meet emissions for some reason. I think it does catch some of the back vapors though like you said...

[djb383]

How can they possibly be more strict on motorcycles than cages? Cages have had catalytic converters for 30 years. Even today, only a handful of bikes have them.........and yes, when you hammer the throttle doing a dyno run, 2 wheels or 4, they all go open loop and pig rich to protect the engine. However, 99.9999% of the time the engine is NOT at WOT, like it is for a dyno run, they run very lean.

Also, I believe the TRD CAI has the carbon filter. Maybe someone here can confirm.

[weird22person]

Originally Posted by pennyrilehunter

What the heck are the fumes going to hurt when the engine isn't running? Assuming that if you remove it Toyota would probably try and void your warreny if they found out?

I'm assuming that if you replaced the factory box with a CAI it wouldn't have the carbon filter. Thinking about getting one, just have to decide on which one. Leaning towards the Volant or the AFE. Like the idea of not having to oil the filter.

Easy fix in that case...keep an extra filter with the carbon around just in case you need to go to the dealership.

[Nukedog]

Originally Posted by djb383

How can they possibly be more strict on motorcycles than cages? Cages have had catalytic converters for 30 years. Even today, only a handful of bikes have them.........and yes, when you hammer the throttle doing a dyno run, 2 wheels or 4, they all go open loop and pig rich to protect the engine. However, 99.9999% of the time the engine is NOT at WOT, like it is for a dyno run, they run very lean.

Also, I believe the TRD CAI has the carbon filter. Maybe someone here can confirm.

My motorcycle has 3 catalytic converters and 02 sensor as well (as do any motorcycles that are closed loop and open loop isn't an option at WOT it is a constant variable in the ECU). You are so very wrong about what you think you know about bikes with regards to catalytic converters. You are also wrong on how a motorcycle engine is tuned on a dyno (by someone that has a clue anyways). When you want to learn some about cycles PM me and i will point you to real world tuner with credentials that are as good as they can possibly get and yo can ask them...

On-Highway Motorcycle Emission Standards for EPA and EU HC (g/km) NOx (g/km) CO (g/km)
1980 EPA Limits 5.0 NA 12.0
2006 - Tier 1 1.4 (HC+NOX) 12.0
2010 - Tier 2 0.8 (HC+NOX) 12.0
Euro II (2004) 1.0 0.3 5.5
Euro III (2007) 0.3 0.15 2.0

[djb383]

OK, enlighten all of us, who's your expert? God, I hope it's not motoman.

[valant]

Yes the TRD has the Carbon Trap.

Mine on the other hand, was removed.

[Nukedog]

Originally Posted by djb383

OK, enlighten all of us, who's your expert? God, I hope it's not motoman.

Dave Owen (NA land speed holder at Maxton (ECTA/LSR))
Joh Noonan - even has a discovery special on this guy working for JE Pistons and land speed holder at La Mirage, Bonneville
Lee Carpenter, Lee Shierts, Coby Adams, Chuck Wilburn, Brock Davidson and anyone else in the motorcycle performance industry that's posts on our boards regularly to help us improve our bikes and helping with technical aspects.
I have also helped build/tune a few motors with LM1/DL32 stuff from Innovate Motorsports Wideband Air/Fuel Ratio Tuning

They are not just my experts but all these guys still help our community of LSR/Drag racing and they all pretty much agree 1000% on all tuning aspects. Google any of those names and i am sure you can find something.

PS - for the best guru on actual tuning in the Southeast look up Sal Spatafora from Ace Performance. Good cycle tuners use percentage based throttle inputs and spend 3-4 hours on the dyno on 1 bike as well as some doing the same info in actual on road tuning...

[BigWhiteTundra]

If you remove the carbon filter in the air box.Will it help or hurt the engine

[djb383]

Won't hurt the engine, just the environment.

[djb383]

Originally Posted by Nukedog

Dave Owen (NA land speed holder at Maxton (ECTA/LSR))
Joh Noonan - even has a discovery special on this guy working for JE Pistons and land speed holder at La Mirage, Bonneville
Lee Carpenter, Lee Shierts, Coby Adams, Chuck Wilburn, Brock Davidson and anyone else in the motorcycle performance industry that's posts on our boards regularly to help us improve our bikes and helping with technical aspects.
I have also helped build/tune a few motors with LM1/DL32 stuff from Innovate Motorsports Wideband Air/Fuel Ratio Tuning

They are not just my experts but all these guys still help our community of LSR/Drag racing and they all pretty much agree 1000% on all tuning aspects. Google any of those names and i am sure you can find something.

PS - for the best guru on actual tuning in the Southeast look up Sal Spatafora from Ace Performance. Good cycle tuners use percentage based throttle inputs and spend 3-4 hours on the dyno on 1 bike as well as some doing the same info in actual on road tuning...

And all those ronnie racers set those bikes up to run rich, to pass emmissions. Yeah right.

[Nukedog]

Originally Posted by djb383

And all those ronnie racers set those bikes up to run rich, to pass emmissions. Yeah right.

No. Why would you say something like that? From the FAFCTORY they have verified on many bikes that they are coming rich (not lean) for some reason and still within the requirements of EURO 3 which is nearly identical to ULEV 2 based on numbers.

These are not mearly racers but record setting experts in their field. Maybe you shoud google some names and learn instead of talking trash.

PS - Mototuneusa.com is the general accepted practice of breaking an engine in though if that is what you are implying.

Next you are going to tell me NOT to use synthetic oil for the first 5000 miles...ROFLMFAO