Trash Can + pizza tray + hose = Cold Air Intake
 

Hi people, when I bought my car it came with a HOT air intake instead of the stock air filter and we all know that our engines are too hot and hotter air is not good for them.

I was searching for Cold Air Intakes and found that there are mainly two options:
1. Moving the air filter to the outside of the engine bay, which usually means removing the windshield washer reservoir.
2. Building a fresh air box around the filter inside the engine bay.

I don´t want to loose my windshield washer functionality, nor complex relocation of its reservoir, so I ended with a kind of option 2 approach, but not exactly a box, but a bucket...

How to convert a trash can, a pizza tray and some radiator hose into a cold air intake? Well, it takes inventive, patience, a burnt drill, sore hands and a cut finger...

So, to fix this:
https://www.rx7club.com/attachment.p...1&d=1285482220

I used this:
https://www.rx7club.com/attachment.p...1&d=1285482220

and this:
https://www.rx7club.com/attachment.p...1&d=1285482220

First, I cut the inner bucket of the trash can so the air filter fits in and then cut two holes for the hoses that will route the fresh air to the filter. I made a template for the cold air bucket lid to enclose the filter in it...
https://www.rx7club.com/attachment.p...1&d=1285483109

I made another template to surround the plastic bucket with the metal of the trash can. Those templates were used to build the lid and the "metal heat shield" and here the results...
https://www.rx7club.com/attachment.p...1&d=1285483757
https://www.rx7club.com/attachment.p...1&d=1285483757

The original idea was to make two "little" holes in the inner fender to get fresh air to the filter, but my drill died on me just after finishing the first hole, so I ended making only one hole in the fender and routing the second hose the the front, near the gap between the hood and the passenger headlight...

This the first test fit. Note that the heat shield is not installed yet...
https://www.rx7club.com/attachment.p...1&d=1285484443

And two angles of the finished product...
https://www.rx7club.com/attachment.p...1&d=1285484443

https://www.rx7club.com/attachment.p...1&d=1285484443

I am thinking of putting some kind of Mazda decal on it... so it can look more "factory" :nod:

What do you think people?

That's.... FUCKING.... AWESOME!

EPIC WIN! (Says my fiance)

That get major kudos for inventiveness, man...

All except for the 'holes in the fender' bit... But since you meant the inner one, it's okay.

One question, though: Why's the radiator hose pointing UP? Wouldn't the be jammed into the underside of the hood?

Okay. I know that was TWO Questions, but WTFE.

AWESOME! Make me one, for my turbo inlet pipe! Mazda decals! Awesomeness!

Hmm... Group Buy!

Gigetty.

Radiator elbow
 

Thanks man... it turned all just like I imagined (except for the second hose)... I´m very happy with the results...

I though "inner fender" was a real term hehe... remember I´m from a Spanish-spoken country, not a native English person... (Costa Rica... wow! :))

About the radiator hose, well I don´t know if turbos have the same elbow, but my stock radiator has an 90 degree elbow that points the hose down. Refer to the picture... and no, it doesn't hit anything...

Besides my drill and my finger, other not-so-positive collateral effects of this DIY build was that I hit the windshield washer reservoir with the drill and I have a leak on it now... It's on the top of it so I'm essentially losing the reservoir neck capacity only... not a big deal...

Now I think I have to retune a little my EManage because it's leaning a little... it means my trash-can-CAI is working :ylsuper:

And other thing, doing the math, the cost (not including loses) was:
- Trash can = 10$ (aprox)
- Pizza Tray = 1.5$ (aprox)
- Rad hose = 10$ (aprox)
Total = 22$ aprox

Not bad!! :lol:

I meant the radiator hose, coming out of your intake trashcan... First post, pic all the way to the left.

My fiance is Costa Rican. Her father still lives there, in San Jose and we're actually supposed to be coming down there for Christmas, to see him.

She told me to ask how many people there have RX7s.

looks pretty good, especially considering the oddball materials!

LOL, that's not too bad. For optimal airflow the can should have been a bit bigger, and the inlet hoses are a bit small, but I it looks like you did the best you could with the stock AFM and the space that you had to work with. Kinda funny how your CAI is better than most of the commercial models on the market.

I think you should put a well-known tuner decal on it just to mess with the ricers, or even make up your own name.

A CAI will not affect AFR on a car with a properly-functioning AFM. If your EManage leaned out, then there is probably something wrong with your fuel system or sensors. You may also want to check to see if there is a leak in the intake tract from fiddling around with it, as this could also cause a lean condition.

+1 on the self-promotion decal.... Maybe use 'Cern' and make it with a cool font and work the 'e' into a rotor....

Hm... I d have to look at that... I may post something later on :suspect:

Just out of curiosity, isn't CERN the Nuclear research organization in Europe? > Maybe These Guys?

Please put an Oscar the Grouch sticker on there. Trash-can intake! That is the mark of a true bad-ass!

Now THAT is a good idea.

Firing up Photoshop, now...

Here ya go. Fresh off the dbA: Gear.Head.Designs press.... Oscar the motherfuckin Grouch....

http://www.utistunts.com/DbA/S5%20Ti...otoryOscar.png


Anyone think a quotation is in order?

More awesome. I'm liking this section alot lately.

Innovation is AWESOME!

TrboSpdAnt: That is so awesome! LOL! Good job!

I'm not the cursing type, but I'd be tempted to put "Scram piston biatch" or something along those lines.... rofl. But it's strong enough to stand on it's own for sure.

:rlaugh: :crackup: :score:

yea, it will be fresh air but your inlet hoses are too small which will rob the power that was to be gained, it may even be less efficient than the hot air intake.

Thank you, thank you.

:worship:

Quotation.... I like the "Scram, Piston BEEOTCH!" idea... I agree that it should be something OTG would say.

As far as the leaning bit,That means that it's acting line a ram-air and actually forcing air into the inlet... The Pontiac GTP had a HORRIBLE problem of that. At about 80mph it would lean down to JUST BARELY hazardous levels, under heavy throttle.

Anyone else want something done, graphically, let me know. It's what I do. :egrin:

awesome

Hmmmm interesting that leaning out... its just a little bit but I´ll investigate some vac leaks... And in fact it's feeling a little restricted up top... but a lot torquier down low...

I am thinking of opening the front and put another snorkel there, going to the front like the side hose... TrboSpdAnt, that hose has sufficient space to not be jammed by the hood and hopefully its drawing air from the gap between the hood and the headlight lid.

I don´t know what CERN is hehe... but my nickname is cerM78 with an M :) Those are my name initials (Carlos Esteban Ruiz Montoya) and my birth year...

There are not much RX7s here in Costa Rica... I don´t know exactly but there may be less than a hundred sevens, including all generations from 1st to 3rd... My vert is the only I've seen but there is the rumor that there are other two...

Mine needs some TLC, soft top is torn, paint is a little faded, front bumper and left fender need to be fixed (impossible to find a S5 bumper...) but I love my gas guzzler :lol:

I'll be thinking how to improve airflow without turning the project into a Getto-Trash-can-CAI...

regards!

PD: May be I'll be printing Oscar too :)

Awesome, brother! Let me know if the printers have a problem with the detail and I need to adjust the resolution... My suggestion - as I always suggest when designing things for stickers or vinyl, on cars, is to have it PRINTED on the vinyl... Not just a stack-cut, regular.

'Course, you could use a static sticker (thin plastic sticker), but you'd better NEVER want to remove it. :evilgrin:

Best snorkel total diameter?
 

One question to the experts:

Which is the best total area for the filter trash-can (box) breathing snorkels?

Right now, there are two 2inch inner diameter hoses, so there is a total area of 6.284 inch, which is equivalent to a 2.829 diameter hose (almost 3 inches)

I don't want to drill a bigger hole in my car :) but I can enlarge the side hose or build another front snorkel, but what is the recommended total area I should be looking for?

The stock AFM doesn't seem to have more than 3 inch diameter (don't know for sure) so what is the advantage of having more input area to the filter if the intake itself will have it's own restrictions?

Thanks!!

custom intake FTW!!!

You are correct about the diameter restriction, in the AFM, but there's a difference between the volumes and pressures, regarding.

You can have a 10psi flow in a 1" pipe, which, under the same volumetric flow, double to 20psi, in a .5" pipe.

If the flow is not the same, then the pressure will actually diminish; ergo the air supply will, as well.

I think as long as your FLOWRATE (however much air is actually flowing through the AFM is the same, you'll be fine. But you're also talking about a reading across about 8000rpms.... Volume changes dependent upon the amount of vacuum draw, through the intake (not VACUUM, like inside the engine, but suction).

As long as the air can flow as easily as it does through the stock intake, to the AFM, all good as gravy.

I think you ought to look and see how much room you've got to work with, in expanding that hole you've already got.

Of course.... You could just remove your FTP lenses to remedy any possible cool-air access problems ;)

Mine FTP are already removed :)

I'll see how much can I enlarge the breathing area... Thanks!

AH. I was looking at your avatar. Thought they were still in place.

The trash can CAI does not have any significant ram air supercharging effect, and most likely it has zero. A true ram air scoop is of a divergent duct design, which does not very well resemble the trash can CAI.
http://www.answers.com/topic/divergent-duct

Let's look at the simplified formula for ram air pressure rise:
PSI = (mph)^2 * 0.0000176
PSI = (80mph)^2 * 0.0000176
PSI = 0.11264

Therefore, assuming the Pontiac GTP has a 100% efficient design (which it doesn't), and assuming it has a 100% efficient intercooler to counteract the ram air temperature rise (which it doesn't), the gain at 80mph would be 0.11264 psi, which would equate to about 0.9% increase in power. If that small amount causes the engine to lean to just barely hazardous levels, then that car is truly one steamy pile of crap. Be sure to tell that to the person who lied to you about that car. ;)

pretty cool,

some food for thought though shiny metal reflects more heat than someting painted black.
so you should of left it chrome looking to get the least heat soak and make it most effective! probably only a very very minimal difference though

Actually, the 2000 Pontiac GTP Ram Air, while QUICK isn't overtly fast, and since the ram-air induction - much like this case - in actually forcing more air, as it should be, any engine will lean out if the TPS and MAF are talking to the ECU accordingly, only so much metered air will be registered, at any given point.

While I always like a great equation, other particulars should be taken into account, for said variables: Diameter:Flowrate (psi) from point 'x' to 'y' on the throttle, no RA effect, on the MAF (we'll say not moving, on a dyno) in comparison to the same control parameters on the highway...

NTM a direct scoop installed, instead of 5' of erroneous piping to slow down/ inhibit the air flow to the intake.

On the highway, you can DEFINITELY feel when it's leaning out (also illustrated on anal-retentive datalogging), where the standard power lacks, vs. where the RA induction overshoots the mark of the MAF's metering parameters.

I think as long as the appropriate flowrate is available, going back to the topic, at hand, your MAF won't dip, too heavily; though it will show leaning out at a progressive rate, under acceleration.

Secondarily, we weren't talking about an increase in power, but an increase in air-flow. Proven by his need to now bump the AFR, to rich, via the Emanage. If this weren't having any effect upon his AFR, he wouldn't now need to adjust it.

Can you email me the Oscar the grouch you made. I just want to use it as wallpaper. Bmwguy330@gmail.com that's awesome.

My avatar is not of my car but a generic one I found somewere :)

My Vert has the headlight lid scoop which I think is pretty ugly but it may have some kind of functionality now that some cooler air is being drawn by the front-top directed hose of the trash-CAI... I never thought of this project as a RAM air intake, specially when most Costa Rican "high ways" don't allow more than 80kph (50mph) :icon_tdow

I'm already thinking of my Trash-CAI v2.0 so be prepared!

Regards.

PD: Experts, remember for the total intake area I should be looking for!

Mike: Email sent.

"You've got Grouch!"

TrashCan 2.0!??!

Good GOD, man... Take a break - The fingers could use the rest and you can't afford to lose any more blood (NTM replacing another drill)!

Trash-CAI not trash can, please... that´s going to be my copyright :lol:

:)

are you freaking serious? this is horrible lol
you just defeated the purpose of in intake.
go back to stock air box lol

Later down the road you will realize how silly this is and will eventually take it off.
Im not being a hater, I just don't see this being beneficial.

That original filter with the shield was fine.

Cerm, if you get the chance, post your AFR readings before and after using your invention...

I'm curious to see where it's leaning out (RPM, speed, etc.)

I got to wondering something and want to look at the data-log file, from the eManage, just to verify.

Trash.0 (That's what I've been calling that fucktard on TV...) FTW.

Lord knows I'm a fan of homebrew solutions and can applaud the creativity employed here but the base approach seems flawed to me.

The problem:
-Airbox has been removed and a cone filter installed in it's stead.
-Cone filter only has access to pre-heated radiator waste air.

Your assumption:
-Fresh, ambient air must be directed to the filter.

Your solution:
-Build an Ikea version of the stock airbox, feed it fresh air via ducts.

In essence, from the very beginning you assumed "Must create airbox" and went from there. This lead to a shinier version of the stock arrangement- same location, identical function, worse fit.

If you look at the space in the front of the radiator- especially if you have no AC- you'll realize that there is a relatively large area that's not exposed to the elements directly and is full of nothing but ambient air.
Instead of bringing air to the filter, you're can bring the filter to the air and simplify the solution considerably.
You no longer need to build any sort of enclosure- you've just repurposed the nose of the car as the "airbox"- and only need to connect the filter to the MAF (which only requires tubing).

The filter is now living la vida loca- sucking in all the best quality air available (without you having to wonder if it's constrained by your enclosure)- and the engine bay has been decluttered and simplified as well.

I used this very approach on both my 7's, the rotary FC:
http://img.photobucket.com/albums/v7...er/NewRez2.jpg

http://img.photobucket.com/albums/v7...ker/Bay3-1.jpg

And the mongrel FD:
http://img.photobucket.com/albums/v7...Intakenew3.jpg

Both cars are daily driven and have experienced monsoon-level downpours with no ill effects.

It's a viable alternative you might consider.

Do you have any more pictures or a write up of what you used/ took out clokker?

it looks very beneficial!

Clokker: Is there direct airflow, on the filter to affect your AFRs?

Yes, here.

Neither filter is in direct airflow but I'd suspect that there is a fair bit of turbulance present.
Have no way to see the effect on AFRs.

I LOVE IT! i made mine from cheappy baking sheets, car weatherstripping, hardware, and spray paint. ive drove the car very very little before and after the CAI, it does sounds better and improve throttle response though.

clokker you seem very knowledgable. how does my setup look?

Perhaps you've confused "opinionated" with "knowledgeable".

However, forging on...
Your setup fails my requirements by functionally duplicating the pre-existing stock airbox (to the point of retaining the stock snorkel, even).
It does appear to have been thoughtfully designed and constructed and I'm sure it works fine, it simply doesn't meet my (self-imposed and completely arbitrary) criteria though.

:lol::lol::lol::lol::lol:

hey thanx alot, its my first time making one and the more info received back about it the better!

Kudo's to you for possessing ingenuity and getting creative.



http://www.threadbombing.com/data/media/3/lu3z6.gif

Everything is true!
 

I agree with all opinions written lately!

1. My car didn't have the original air box, in fact I looked for the stock box because I wanted it back... to no avail (I didn't looked at this forum though)
2. I have all commodities (AC, Windshield washer) that obstruct the filter relocation to the exterior and I don't want to remove them (yet) so moving the filter " to the outside" was not an option (yet)
3. I'm little crazy and love to make things with my own hands even if not of real benefit or use
4. Other air filter enclosures I've seen are of the "squarely" design and I though "why not to change shape?"

It's true that the best to get fresh air with no restrictions and not "duplicating" the original air box is to put the filter outside! :icon_tup:

Somewhere in the future!

Regards!

Had you looked in this forum you'd be buried in airboxes...hell, I have two you could've had for the cost of shipping.

It'd be interesting for you to swap between the stock box and your homemade version...see if you noticed any difference at all.
The OEM part is probably quieter and I'd guess any "performance" advantages- either way- would be more imaginary than anything else.

Clokker bad thing is that I don't have the stock box... removed by some P.O.

And yes, usually "Ass-o-mometer" is very subjective and influenced by imagination :lol:

Regards!

So I don't thread-jack, here's another logo: https://www.rx7club.com/rx-7-audio-visual-lounge-143/logo-stuff-923973/

That was pretty creative. Interesting might have to try that.

Uhhhh....what? :scratch:

As you approach warp9, the atomic bonds of steel begin to loosen and O2 molecules can blast through the bulkhead behind the headlight, gather into a coherent mass and literally cram themselves down the intake.

Read your owner's manual, it's all in there.