In case you were curious… here are the intake smog filters

[cosmo73]

Here are the intake smog filters.

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[Mustang6924]

Any notable driving experience with them off? Just wondering if they're worth the effort to take out.

 

[cosmo73]

Still only having 400 miles on the car, I haven’t been past 5k. They took less than 20 minutes to remove, can go back in just as easily(which I will be doing to be compliant with local laws… )

My thinking was that is a lot of surface area restriction and I can’t imagine how it will not increase power by removing. I’d say very conservatively the filters are blocking 20% of the opening.

 

[jimgt2k24]

No mention of them in the manual. They must last forever.

 

[Crew4991]

Still only having 400 miles on the car, I haven’t been past 5k. They took less than 20 minutes to remove, can go back in just as easily(which I will be doing to be compliant with local laws… )

My thinking was that is a lot of surface area restriction and I can’t imagine how it will not increase power by removing. I’d say very conservatively the filters are blocking 20% of the opening.

LOL the state is gonna follow the smog trail behind you and catch ya...

 

[cosmo73]

No mention of them in the manual. They must last forever.

They are not meant to be changed or removed. I’ve seen a few videos of dyno pulls with the Mach 1 (it had a similar carbon filter/trap) and the S650 and it was a noticeable power increase. Ranged from about 5-18 hp gain. Throw on an exhaust an maybe a few more…

 

[JPGC_S650]

My concern with these carbon traps are as they age...will they become brittle and start to come apart in the intake itself. Considering how easy the are to unwind and remove. Regardless of gains or not, I will eventually remove these just to get them out of there.

 

[Zengineer]

What exactly are they supposed to do? (Please no guessing, I can do that myself)

 

[FarNorth]

They catch vapours wandering up the intake after the engine stops until the next startup when those vapours are then pulled in and burned. Just part of the emissions control system.

i have seen wild numbers on YouTube of up to 20hp gains but in reality on a dynamometer only 4hp and 3ft/lb and always accompanied with K&N filters. So which actually provided the increase? The removal of the carbon filter or the K&N? In any event it’s not enough to feel and the removal may void your warranty.

 

[Gr8ful]

I did read here someone removed them and got check engine light. I don't see how that would effect it except the fuel/air ratio.

 

[Zig]

What exactly are they supposed to do? (Please no guessing, I can do that myself)

If we can find a part number we may be able to find the description.

 

[Zengineer]

If we can find a part number we may be able to find the description.

No need. The question has been answered.

 

[Zig]

They catch vapours wandering up the intake after the engine stops until the next startup when those vapours are then pulled in and burned. Just part of the emissions control system.

i have seen wild numbers on YouTube of up to 20hp gains but in reality on a dynamometer only 4hp and 3ft/lb and always accompanied with K&N filters. So which actually provided the increase? The removal of the carbon filter or the K&N? In any event it’s not enough to feel and the removal may void your warranty.

Are they there in anticipation of the user removing the air filters that are located at the beginning of the closed intake tract?

 

[Zig]

No need. The question has been answered.

As an ‘official’ guess

 

[Zig]

They catch vapours wandering up the intake after the engine stops until the next startup when those vapours are then pulled in and burned. Just part of the emissions control system.

Wandering wafts working against the vacuum of the intake? Working their way past the closed throttle bodies?

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