look

 

Isn't that part of the air filter? Take that out and you might end up with a frog in your cylinder.....

 

hose just coming out of the airbox to the TB.looks like a major restriction.I'd like to know what the heck it is before I do anything.Its a metal like plug in the hose that appears will remove easily.

 

no,has nothing to do with air filter at all.

 

another pic of airbox lid

 

airbox bottom

 

It's the new tornado!

 

that is quite the obstruction!

 

Thats your hydrocarbon trap I believe. It filters the gas vapors that escape out of the engine after shutdown.

Here you go....

Engelhard's hydrocarbon trapping technology, which prevents a large amount of evaporative emissions from reaching the environment, can help automakers with tough, new standards. Under a phase-in schedule beginning now, carmakers are required to dramatically reduce evaporative emissions. All gasoline-powered vehicles will be required to meet the new standards by 2007.

This technology, developed by Engelhard Corporation, provides carmakers with an additional tool to deal with increasingly stringent California LEV (Low Emission Vehicle) II standards and United States Environmental Protection Agency (EPA) Tier II standards for evaporative emissions that begin to take effect in 2004. All gasoline-powered vehicles will be required to meet the new standards by 2007.

Evaporative emissions are hydrocarbon (HC) vapors that come from sources in an automobile other than the exhaust system. Major sources of evaporative emissions include an automobile's air intake system, fuel rail, exhaust gas recirculation system and gas tank.

With today's efficient exhaust emission controls and cleaner gasoline formulations, the United States Environmental Protection Agency estimates that evaporative emissions can account for the majority of the total hydrocarbon pollution from current model cars on hot days when ozone (smog) levels are highest.

Engelhard developed a proprietary zeolite composition based on its earlier successes in reducing "cold- start" emissions (pollution that escapes a car in the first minute or so after ignition). This new zeolite composition has a high capacity for hydrocarbons, which are trapped within its pores and channels. Engelhard coats the zeolite composition onto a substrate using a special binder that is designed to provide excellent adhesion.

This "hydrocarbon trap" is placed between a car’s air cleaner and engine where it can capture hydrocarbons that are escaping through the air intake. This position is desirable because the air intake system contributes as much as 50% of total evaporative emissions.

The trap adsorbs hydrocarbons that are emitted when the engine is stopped. Once the car is started and driven, the trap releases the hydrocarbons into the engine where they are burned. In this way, the new hydrocarbon trap continually regenerates itself.

The hydrocarbon trap is designed to be tamper proof so it does not require the use of costly on board diagnostics (OBD) equipment. The trap also has minimal impact on airflow into the engine and can withstand exposure to ice, water, salt, dust, air filter surfactant and engine backfire.

 

good find comp orange!Now I know why ford says emissions have been improved in the stang catalog.I must say It looks like a major restriction.I would say 5hp at least.I will wait till someone dyno's a stang with and without to see.

 

That's gone with a good cold air intake kit and a new MAF anyhow. No concerns.

 

Yeah, but does the substrate release gasoline vapor when the engine is running and if so, are the fuel tables trimmed to take this into account?

Engines are no longer designed with emmission controls as an after thought or an add on. They are designed as a system from the get go and Alot of the old school mods dont just cut it anymore.

 

I would wager any HCs coming off the zeolite would be a very tiny fraction of the total airflow, for only a very short time after startup, and that no fuel table mapping adjustments would be necessary. The O2 sensors would be able to compensate, if they even see a difference. And I bet that it doesn't make any difference anyway since the motor runs rich during the cold startup phase until the water temp comes up and timing is retarded and the mixture is leaned.

The dyno numbers'll tell us.

 

ehh get it out.

 

its already out .replaced with a honeycomb aluminum piece from ground control.Man ,that thing was restrictive.

 

Got any dyno or ET comparisons to back that up?

No doubt that it didn't hurt the performance to remove it, but it's all about the numbers....

 

Did you notice any improvment with the exhaust sound? more rumble? Like changing to cold air on the SN95.

 

Hey, look what just fell out of my Mustang (grin).





Just as I removed it, we had a downpour, so no tests yet.

When I finally go in for a dyno, I should probably do an A/B test with it in and out.

 

Question: Does anyone know if this is ~also~ supposed to straighten airflow across the MAF sensor, or is it JUST a hydrocarbon trap?

 

IT doesn't look all that restrictive.

We need with and without dyno runs to tell us whether is really is affecting HP.