What is this black box .....??
 

Hi Folks,

While looking over the engine compartment of my new FR-S, I spied this black box (the one with the matt finish, right - center, in the picture below).

Can you tell me what's it called and what it does ..??

TIA

humfrz

Cricket feeder?

It's where they mounted the flux capacitor on the FR-S.....:lol:



http://i1011.photobucket.com/albums/...he_furious.gif

Its just a resonator in the stock intake, as Campy showed above in his pic.

It's where VTEC fluid goes.
Oh wait, wrong forum.

They put a sound tube so you can hear the intake... but they put a resonator to lower the noise...

http://4.bp.blogspot.com/-QTs5FVw9uo...-chan-meme.jpg

The point of a resonator is not to lower noise, it's to achieve a desired intake noise.

This may be a lower overall noise output (db), or it could be a specific intake note under acceleration (what you hear in the sound tube).

Ideally the manufacturer wants an aggressive intake note on sports cars (especially small displacement/low cylinder count) without droning.

-alex

Edit: http://en.wikipedia.org/wiki/Resonator#Automobiles (also forgot resonators often are used to improve air/exhaust flow if tuned properly. this improves VE of the engine while still meeting emissions requirements)

I know what it does, I was doing a joke...

If so why does the TRD intake delete this ricer part. :iono:



Disclaimer ricer part is in my opinion....:lol:

I'm explaining to the OP what the resonator on our cars do. Your post (joke or not) just so happens to point out the most common misconception about intake resonators, hence my quote.

-alex

Boys...dat der is r a Hemi.

Sometimes it simply is used as a muffler...

My E39 came with an Intake Res, whereas the E46, which has the same exact engine, didn't.

Why do most aftermarket intakes do without resonators? To achieve max performance gains, with droning and emissions as secondary concerns.

http://www.ehow.com/info_12156112_ai...onator-do.html
The link talks about performance, but this also ties into the primary reason: stock ECU tune for maximum balance of performance/reliability/emissions.

OE intakes are designed that way for a variety of reasons, many are related to actual driving comfort of occupants in the vehicle from what we can hear/tell. A lot of aftermarket exhausts have annoying sounds at specific frequencies because of lack of sound tuning for this reason.

Just because it's TRD doesn't mean it's Toyota's aftermarket gift to this car.

-alex

BMW may have added improvements in the intake manifold, runners, secondary valves in runners, or ECU tune to remove the need for an intake resonator.

There's many reasons beyond what you can see on the outside.

-alex

Same Engine, Same HP and TQ numbers, built at the same time... only difference... one marketed as an upclass sports saloon (quiet) the other is a sports coupe, sedan or vert.

I think the only reason the FR-S has a resonator is because of the sound tube.
Be it a TRD intake or any other brand they don't have a resonator because these intakes delete the sound tube so there's no need for a resonator.;)

I can check with Toyota Corporate about this to make sure this is why the stock intake has a resonator.

Aside from sound, the chassis is different... so the platform and conditions under which the car is designed is different.

Also, I'm willing to bet the gearing and final drive, as well as suspension (wheel) specs all play a role in how the engine intake is tuned.

Splitting hairs here but the main thing is, it's not just as simple as sound to most of us.

-alex

Non of that has anything to do with a engine intake resonator, now you're just talking non-sense

Leave him alone Luis, he used to drive a Camry. Let him feel professional.

No one likes Mav, it's okay.

WOW - you folks are informative and fun ..... :w00t:

@campy - thanks for the diagram idfentifying the part.

@mav1178 - thanks for the link with the information.

@dsrttigr - so that's where they keep the cricket feed (I fixed them up, by dusting some DDT into the intake).

@TRD-X - now, I didn't fall off the pumpkin wagon here in Puyallup .... I do know that the flux capacitor is part of the electrical system....cause the black box didn't shock me.

@BANGER - no..no..no ... cause it doesn't have a yellow cap.

@Luis_GT - are you bi-polar..??? (jest ah messen wich ya).

@djleepanda - are you from the south .... ??

Well, thanks all .......... :happy0180:

This seems to explain it pretty well:

From the reference:

"The Resonator
Adding an expansion chamber to the intake tube forces air coming back out of the engine to slow down to fill the cavity, thus expending a great deal[IMG]file:///C:/Users/Roger/AppData/Local/Temp/msohtmlclip1/01/clip_image002.png[/IMG] of its energy and slowing the pressure wave reversion. This slowdown allows fresh air to flow toward the engine without fighting pressure reversion waves the entire way, thus aiding in cylinder filling. Since these pressure waves are essentially sound, giving them a place to expend their energy before exiting the air filter box ends up dampening the intake noise and quieting the engine. Thus, the resonator helps to make the engine paradoxically quieter and more powerful."

Thanks again....... :thumbup:

humfrz

PS - no one mentioned it might be a muffler bearing .... ??

I happen to have mood swings... you feeling lucky, punk!

:bellyroll:

It was a joke....:sigh:

They do, because again they're part of platform design goals. Yes it's just noise to you but that is one part of the unknown.

As for the other personal insults, keep them coming. It's entertaining to see what some people are like on here.

-alex

Right design goals other than suppress noise... keep thinking that... mean while, I just drop in the E46 intake tube and have glorious intake noise.


PS, a 330i Engine and transmission is plug and play with my 530i.

What is funnier is that car wont hit 88 in the quarter mile

Yeah after seeing a bunch of his posts, all he wants to do is look superior to everyone. Everybody could appreciate a knowledgeable person, sure, but to always come off as a Mr. Know-it-All is really getting old.

So, by deleting the resonator from the OEM airbox, I would be reducing the power from the FA20? :iono:

I don't get that vibe myself in this specific thread, because he made valid points.

Highly doubt it.

Well I'm just here to learn something I might not know about the FR-S and check out all the cool mods......:drool:

[QUOTE=Enthalpy;1Highly doubt it.[/QUOTE]

That's what my thoughts were, I just wanted to confirm.


Sent from my SCH-I535 using Tapatalk 4

I don't claim to know it all, I just take the view that there's not a simple explanation for some things.

In the context of this thread, yes the intake resonator for a BMW 3-Series may be different from a 5-Series, but what is the target audience for the car? More importantly, resonators are not about reducing sound... much like aerodynamic lift on a car, the reverse of it is often labeled as "downforce" when it should be named negative lift.

Resonators are used to achieve a desired intake noise. Whether that's lower/higher is a part of that, but to say resonators are used to lower intake sound as a blanket statement is adding to the common misconception.

But if you want to join the personal attack bandwagon like everyone else, go for it. I judge you by your individual posts, I don't make wholesale judgments on your character by what you collectively post online.

To each their own.

-alex

The problem is that you keep saying there is something more to the resonator, but have not been able to prove it even after I showed you 2 cars using the same exact engine, producing the same HP and TQ numbers.

All you are throwing is simple unsupportable speculation as to how a resonator is used by a company.

I'm not going to go back and quote myself on this. You can read what I wrote.

I am speculating. And in case you missed it, you're speculating as much as I am.

Two identical engines and identical peak horsepower/torque numbers does not mean the engines have the exact same tune... it may be very close but there may be minor differences.

BMW isn't stupid... the same engine used in a heavier car (5-series) would have a different projected consumption and warranty requirements over the expected lifespan of the model. The easiest way to make changes to this is to fine tune the engine powerband...

That's all I am saying. If you continue to read it as me throwing out unsubstantiated speculations, so be it.

-alex

The engine was also used on the X5, which is a LOT heavier than a 5 series, and it doesn't have a resonator... So that nulls and voids your heavier thus requiring a resonator argument.

Huh?
TRD is Toyota's in house developed performance/aftermarket parts.
If this is not what Toyota meant for their version of a performance intake what is?

I never said a heavier chassis requires a resonator. I'm merely stating that there may be design goals we're not aware of beyond just sound. Please understand that this is my only point.

I feel this is distracting from the thread but I'll just answer:

TRD's aftermarket parts are what Toyota feels they can sell to car owners while retaining a warranty. Depending on the territory they can also be street legal if required (CARB E.O. comes to mind, for example).

However, given that they are restricted by what they can/cannot do to the ECU (they can't simply reflash the ECU, for example, because it may make the car be in non-compliance of emissions laws), there's always some type of constraint that prevents the part from being the best that it can be.

Often times aftermarkets are better performance at a cheaper price than the OEM "racing" version of the same part, because a lot less money was spent on R&D for regulation compliance and more R&D was spent on outright performance.

-alex

Dude I'm tired of your lack of knowledge learn before you speak there's guys here that's been modding cars for years and your trying to school them.

All TRD parts are 50-state Emissions Legal.

Toyota dealers reflash the ECU's everyday.

I'm not trying to school anyone. Please go back and read what I wrote... "depending on the territory" implies that it can be street legal in places like California (and for the most part the rest of the country), but not meet other regulations in, say, the UK or Germany.

1) Intakes are mostly street legal, but not all TRD parts are street legal. Some intakes in other countries may not meet local requirements. If it's street legal it just means the manufacturer has taken the necessary steps to meet emissions requirements.

http://www.toyotaracing.com/trd/cata...g_lowres_R.pdf (last page)

2) Toyota dealers do reflash ECUs every day, but that's not my point. Is there a specific ECU reflash that is supposed to be done with an intake install? If not, the R&D was put into the intake itself to work with the OEM ECU flash, hence the higher cost of the TRD intake versus a comparable aftermarket design.

A Toyota dealer reflashing a Toyota manufacturer approved ECU flash, versus Toyota offering a ECU reflash that is not in emissions compliance are two completely different matters. The former almost always have to be approved by the EPA prior to being sent to dealers, the latter requires extensive testing to make sure it doesn't change some other parameter of the car excessively.



As a closing note, I'm not going to edit anything I've written in this thread. People can read it and figure out if I'm blowing hot air out of my ass or not. And I'm definitely not schooling anyone with wrong/misleading info, contrary to what has been claimed.

-alex