Custom CAI(at last)

[Katana]

Because I got bored waiting for a tuning company to produse a CAI for my car, I decided to make one of my own.

Here are some pics
http://img.photobucket.com/albums/v398/Alex-R/Yaris/CAI1.jpg

http://img.photobucket.com/albums/v398/Alex-R/Yaris/CAI6.jpg

[ToyVitz]

Good place to get some fresh cold air! Now you need to frabricate a plate so you can block off that hot exhaust. :thumbsup:
P.S. I like the little horns on your toyota symbol...haha!!!

[Katana]

Thanks.

I really need to find a plate cause the exhaust manifold is really burning the incoming air!

The horns on the Toyota symbol are an idea of the greek Yaris club.

Thanks for all the good remarks.

[jmew0ng]

I keep thinking of a frat when he says "greek yaris club" haha

Did you happen to feel any improvements?

[eTiMaGo]

Looks quite nice, too bad the engine block below looks so... naked! Who'll be the first one to polish/paint their engine head?

Also, that long, lonely pipe is begging for a turbine as a friend :biggrin:

[Katana]

Did you happen to feel any improvements?


Οh yeah, above the 3500rpm the car really goes great now!It has gained at least 5hp!

[Katana]

Looks quite nice, too bad the engine block below looks so... naked! Who'll be the first one to polish/paint their engine head?

Also, that long, lonely pipe is begging for a turbine as a friend :biggrin:

Yeah it is very naked now...

I would like to paint it!Also, as far as a turbine is concerned, OH YES!

[ChinoCharles]

That actually doesn't look too bad Katana. If you can just isolate the filter from the engine bay a bit you might have something going there.

[Katana]

Well, as my friend ChinoCharles says, I think that I have not discovered the full potential of this stuff.

First of all, I don't know if you have noticed it, but there is a small hole behind the grill, in the front right part of the car.I think that it has to do with the 1.8lt model(maybe for cold air).

So, my custom intake takes in fresh cold air from that hole.I am trying to find a way to take off the hole plastic cover from the inside, so that the intake takes in great amounts of air.Certainly, I would not like to cut it, because in rainy days, it will protect the engine from water.

Finally, as ChinoCharles states, I have to figure out a way to isolate the filter from the exhaust manifold.

If you have any ideas on that, feel free to express them.

Thanks for all the posting guys!

[paultyler_82]

CF shroud might work pretty well, btw, check your PM's

[Kitt]

Is it giving you a check engine light? a friend of mine lend me one but i was getting check engine, apparently the MAF sensor was detecting too much air. How can i override this?

[ChinoCharles]

It looks like you have some frame there to work with. I saw someone do this for a CRX... he needed to isolate the filter from the manifold so he took some cardboard and began cutting and bending and marking for holes in the car until he had a general mockup of the piece required. Then just fab up a piece with some aluminum or something. I think he actually used the cardboard for a while... you know how CRX owners can be!

[Katana]

Is it giving you a check engine light? a friend of mine lend me one but i was getting check engine, apparently the MAF sensor was detecting too much air. How can i override this?


At first I had had this light.Maybe it had to do with the new readings that AFM/MAF sensor was reading.After 3 hours it turned off.

What engine does your friend have?Where has he put the AFM sensor?

ChinoCharles tnx for the advice.

[SimmZ]

You are not affraid to receive water on your air filte??? Cause it was located directly behind the open grille when the water is going throught!

[Katana]

Εxactly.That's why I am trying to find a way to easily install and de-install the plastic protective cover.

[jeff_o]

wait.. CAI is cold air intake right? i havne't done my researching but what does CAI do for your car? aside from sucking cooler air then the normal? and how does sucking cooler air translate to more HP? is that how it works?

[ChinoCharles]

Cooler air is more dense than warm air because on a microscopic level there is less mollecular movement of the air itself. In other words, you can cram more cold air than warm air into the same space.

The first two strokes of an internal combustion engine have to do with first taking air and fuel into the combustion chamber, then compressing this mixture right before ignition. A cold air intake does a few things to help this process along. First, it (usually) relocates your source of air further from heat-producing parts of the engine, hence the term cold air intake. Second, it (usually) cuts down the length of space in which the air has to move, thus your air hits the intake manifold at a higher speed. Both of these facts mean more air in the combustion chamber, and more air means more oxygen which means a more violent ignition... which means more HP!

[Katana]

Εxcellent explanation!It couldn't be better!

[ism3t]

Cooler air is more dense than warm air because on a microscopic level there is less mollecular movement of the air itself. In other words, you can cram more cold air than warm air into the same space.

The first two strokes of an internal combustion engine have to do with first taking air and fuel into the combustion chamber, then compressing this mixture right before ignition. A cold air intake does a few things to help this process along. First, it (usually) relocates your source of air further from heat-producing parts of the engine, hence the term cold air intake. Second, it (usually) cuts down the length of space in which the air has to move, thus your air hits the intake manifold at a higher speed. Both of these facts mean more air in the combustion chamber, and more air means more oxygen which means a more violent ignition... which means more HP!

wow, just wow man!:laughabove: :w00t:

[jeff_o]

wow... chinocharles.. everything you said makes sense... now i understand... it's all physics. by the way have you heard of the vortex air intake? it just swirls the air going towards your intake manifold... i kinda don't believe it will give you more HP as opposed to what they advertise. whatcha think man?

[paultyler_82]

wow... chinocharles.. everything you said makes sense... now i understand... it's all physics. by the way have you heard of the vortex air intake? it just swirls the air going towards your intake manifold... i kinda don't believe it will give you more HP as opposed to what they advertise. whatcha think man?

Those "Tornado Fuel Savers" or the other 50 names they go by are complete and total BS, they actually end up making the intake a little more restrictive! Other scams to watch out for are the fuel line magnets and the "electric superchargers"

[RTsang]

Cooler air is more dense than warm air because on a microscopic level there is less mollecular movement of the air itself. In other words, you can cram more cold air than warm air into the same space.

The first two strokes of an internal combustion engine have to do with first taking air and fuel into the combustion chamber, then compressing this mixture right before ignition. A cold air intake does a few things to help this process along. First, it (usually) relocates your source of air further from heat-producing parts of the engine, hence the term cold air intake. Second, it (usually) cuts down the length of space in which the air has to move, thus your air hits the intake manifold at a higher speed. Both of these facts mean more air in the combustion chamber, and more air means more oxygen which means a more violent ignition... which means more HP!

How does this affect the mileage? I can't imagine getting extra HP without decreasing the MPG.

[ChinoCharles]

I've heard some real-world gains with Tornado's and related products, but it could be bullshit. I've never had one myself so I can't really vouch for it. IMHO if you're one of the people looking to stretch the gas mileage on your Yaris (I'm not that person) go drop the 15 bucks or so on a vortex generator and test it out. What do you have to lose?

As far as how it affects mileage, I don't know much about cars but I do know my math and science (physics) and I'll propose this idea and someone smarter can correct me if I am wrong, but... in the intake there is a sensor for the amount and composition (temp, speed, etc) of air coming into the engine, and according to this reading fuel is richened or... uhm... stoicized? (thinned out haha) Like I said, CAI means more oxygen which means the engine (with the MAF sensor info) will "know" it doesn't need as much fuel and will use less accordingly. I don't know a wrench from a mouse, but it makes sense to me.

[Katana]

Yes exactly.I have to say that the consumption of fuel isn't affected at all.If you drive carefully, the car remains as economic as before.

[IsLNdbOi]

So bottom line is that if you drive the same way after installing a CAI, your MPG will go down?

[Katana]

I don't know if it will go down, but for sure it will not go up.

[johnnyfive]

CAI means more oxygen which means the engine (with the MAF sensor info) will "know" it doesn't need as much fuel and will use less accordingly. I don't know a wrench from a mouse, but it makes sense to me.

the more oxygen/air the MAF senser sees the more fuel the computer would send to the engine to maintain the proper ratio.

but at a similar air flow the engine will see the same amount of fuel with or without a cold air system.

but the colder the air, which the temp sensor should pick up, also adding more fuel to compensate for the denser/coler air?

it would seem to me that with either better flow or with cooler intake temps the engine would see more fuel at a given throtle position?

so you will either get a gain in power at that throtle position, or you will need less throtle to net the same power from the engine.

i am no scientist or expert (or english major) but that is just the way i see it, i may be wrong, but just maybe something to think about.



edit: i thought i was posibly clarifying something, but after posting, i am not sure if my original intent was reached...sorry if i confuse anyone

[Katana]

Ιn order to be sure about, I just measured my fuel consumption and it was pretty much the same.

I am telling you guys, the only difference you will see, will only take place if you stop driving economically, because of the perfect sound tha CAI makes.

[ChinoCharles]

the more oxygen/air the MAF senser sees the more fuel the computer would send to the engine to maintain the proper ratio.

but at a similar air flow the engine will see the same amount of fuel with or without a cold air system.

but the colder the air, which the temp sensor should pick up, also adding more fuel to compensate for the denser/coler air?

it would seem to me that with either better flow or with cooler intake temps the engine would see more fuel at a given throtle position?

so you will either get a gain in power at that throtle position, or you will need less throtle to net the same power from the engine.

i am no scientist or expert (or english major) but that is just the way i see it, i may be wrong, but just maybe something to think about.



edit: i thought i was posibly clarifying something, but after posting, i am not sure if my original intent was reached...sorry if i confuse anyone

The more oxygen present in the cylinder, the less fuel it would take to start an ignition... since oxygen feeds fires by default a spark applied to a smaller amount of fuel with more oxygen in the cylinder should result in a strong enough ignition to complete the cycle. The MAF sensor would mitigate this and the result would be improved mileage.

Know that most people will tell you a CAI is SUPPOSED to improve mileage. The difference may be negligable on a 1.5 L 4 banger, but as your engine gets larger the difference should become more noticable.

[Katana]

Well said mate.

I have to say that in case anyone needs to make a CAI I am here to provide him with any useful information on it, like measurements, AFM(MAF) install etc.

[ChinoCharles]

I don't know... the TRD option in America looks nice because it has that built in valve to stop water intake, which frees you up to place the cone where you will see the biggest gains. You don't see that on the AEM intake that was just released, and the TRD is only 30 or 40 bucks more if you order it from trdsparks... some food for thought.

[Katana]

Yeah right.

But I think that the place, from where the TRD CAI takes on fresh air is not the best choice.

How much does it cost?

I paid 170 euros for the custom CAI.

[ChinoCharles]

Thats about 215 bucks... more than a hundred dollars cheaper than the TRD option here, but we all know that money spends a lot different depending on where you are. Who knows what the hell any of this means, haha.

I'm not crazy about where the cone on the TRD option sits either, but I've got some plans to free up some air... possibly cut a hole in the front bumper and throw a gromit and some mesh in there. Functional ram air sans lame-ass hood scoop.

[Black Yaris]

Here is the TRD CAI installed on my 1.5L you can see the bypass valve clearly, I have noticed a hugh difference in HP (5 or so) and about 6-7 MPG increase.... all for $350.00 USD installed, only reason I had it installed was to keep my warranty on everything.
http://i78.photobucket.com/albums/j111/jthomas43613/intake.jpg

[Katana]

I don't care about warranty cause every time I go for a service I just replace the old air filter box.

[Katana]

but I've got some plans to free up some air... possibly cut a hole in the front bumper and throw a gromit and some mesh in there. Functional ram air sans lame-ass hood scoop.


Probably the best solution.

[Centurion2200]

hmmmmmmm this is weird........im seeing the pics of your engines........my Hatchback is 1.3 but the throtle body isnt in the place as katana's......but its in the same place that the 1.5 in the picture.......hmmmmmmmm

[jmew0ng]

throw in some pics ^^ maybe you got a 1.5 instead and they never told you haha

[Katana]

hmmmmmmm this is weird........im seeing the pics of your engines........my Hatchback is 1.3 but the throtle body isnt in the place as katana's......but its in the same place that the 1.5 in the picture.......hmmmmmmmm


Τhis is really weird...

Tell me the code of your engine.

Mine is coded 2SZ-FE.

[Katana]

I am sure that you are not confusing the airbox tube to the throttle body, correct?

[Centurion2200]

Τhis is really weird...

Tell me the code of your engine.

Mine is coded 2SZ-FE.

That's the difference....mine is a 2NZ-FE.....1.3 .....it looks the same as the 1NZ-FE (1.5)....but the cilynders are smaller...

i think i can use the 1.5 intake.....

[Katana]

Ηaha, it appears that you have the old 1.3lt engine, that was fitted to the old Yaris.

How come did this happen?

[Katana]

Αnd yes, you can use almost everything that is made for the 1NZ-FE(1.5lt).

[Katana]

Αre you sure about it?I need a picture of your engine if you can.Tell me exactly what it says in the manufacturer's book.

[regulus]

The more oxygen present in the cylinder, the less fuel it would take to start an ignition... since oxygen feeds fires by default a spark applied to a smaller amount of fuel with more oxygen in the cylinder should result in a strong enough ignition to complete the cycle. The MAF sensor would mitigate this and the result would be improved mileage.

Know that most people will tell you a CAI is SUPPOSED to improve mileage. The difference may be negligable on a 1.5 L 4 banger, but as your engine gets larger the difference should become more noticable.

If the computer managing the engine is set to keep the gas/oxygen ratio the same the CAI means more gas in the chamber.

Ignition might be easier with more oxygen but im not sure the computer is concerned with that when the engine is warm.

Last, expansion is due to the increased volume of compounds in the air phase in the chamber (CO2 and H2O) after ignition and the increased temperature.

In physics you cannot gain anything from nothing. You loose somewhere and this is on gas efficiency

[obylium]

I've heard some real-world gains with Tornado's and related products, but it could be bullshit. I've never had one myself so I can't really vouch for it. IMHO if you're one of the people looking to stretch the gas mileage on your Yaris (I'm not that person) go drop the 15 bucks or so on a vortex generator and test it out. What do you have to lose?

As far as how it affects mileage, I don't know much about cars but I do know my math and science (physics) and I'll propose this idea and someone smarter can correct me if I am wrong, but... in the intake there is a sensor for the amount and composition (temp, speed, etc) of air coming into the engine, and according to this reading fuel is richened or... uhm... stoicized? (thinned out haha) Like I said, CAI means more oxygen which means the engine (with the MAF sensor info) will "know" it doesn't need as much fuel and will use less accordingly. I don't know a wrench from a mouse, but it makes sense to me.


I actually have one of these vortex generators on order and it should come in within a few weeks. I can let you all know if there is improvement, if any on my new CAI.

[Katana]

Yeap, keep us posted!

[Centurion2200]

where did you get the adapter to plug the MAF sensor?...or did you cut it from the stock box....

[Katana]

I made one from aluminium.

[Centurion2200]

this weekend i'll install my custom made intake :)..... pics comming soon ;)

[eTiMaGo]

I actually have one of these vortex generators on order and it should come in within a few weeks. I can let you all know if there is improvement, if any on my new CAI.

LOL don't expect any improvement, but more likely a decrease in performance... those things are the scam of the century, Popular Mechanics even did some in-depth tests on a variety of such cheap "performance-improving" devices and found them to be absolutely useless.

Just think about it, after going through your filter and any bends in the air intake, isn't the air flow already spinning around in all directions? Why add a device to add turbulence when it's already there? All it's gonna do is create a restriction to the air flowing in... And, since they're so simple and cheap to make, and make such improvements to power and fuel consumption, why wouldn't the manufacturers have them pre-installed?

Just think about that :wink:

[Katana]

Well described!

[Katana]

Guys here is a video from inside the car, when testing my CAI on 2nd gear

http://www.youtube.com/watch?v=EuDmVOBovNA

[ChinoCharles]

Nice video (again). You can hear it start to hiss about halfway through. Now, how to fly to Greece to steal your cluster...

[Katana]

Thank you my friend for all the good words!!!

We can schedule a meeting, hahaha!

[henio99]

Hello Katana, i am from Poland and my engine looks like your. Can you tell me how you done this intake? Or maybe now can i buy an intake to european yaris 1.3l?

Please help, i am searching an intake for about one year.

[WeeYari]

^^ Thread is over 3 years old, and user has not been on in 2 1/2 years. Don't hold your breath waiting for a response from him.

[henio99]

I know that but I hope he will responded. Maybe you can help me?