Basic Intake Facts:
The cone filter frees up the breathing of the car by enabling air to be ingested from all sides (as opposed to a panel filter). More restriction is also freed up by using filter media that flows at a higher rate than a stock filter. BE WARNED: with air filters, you tend to get what you pay for, and cheaper filters may not filter as well as the big name filters.
Intakes are not the only option for more power due to induction. Many brands including Tom's, K&N, and TRD make drop-in replacements for OEM filters. Some consider factory airboxes to be superior due to a lack of exposure to high underhood temperatures.
Intakes are often a first improved part to owners new to modification, due to their relatively low cost and ease of installation. Here's a little bit of information about Intakes for 5th generation (90-93) normally aspirated Celicas. These facts all apply to 5SFE motors, but I believe that the fitment will apply to 4AFE motors as well.
Short Rams are probably the most common type of Intake. They usually consist of a short pipe that may or may not have bends in it with a cone or pod shaped filter on the end.
There is one application-specific Intake for the 5th generation Celica, it is made by WeaponR. It is seen above installed on my 1992 GT coupe. The pipe basically looks like an "L". Cost should be around $150, with filter included. If you go this route, I recommend that you either not get the foam filter or get a different filter because the foam one that WeaponR uses tends to break down quickly in climates with large temperature changes and can be sucked into the engine.
Another option is to get an Intake pipe for a Honda Civic and buy a universal cone filter. The Civic pipe basically looks like an "L" with the angle between the pieces being greater than 90 degrees. This is usually a more cost effective option (many companies make Intakes for Civics). Some modification is required, meaning you have to cut some pipe off the long end and drill a hold for the air Intake sensor. Very easy stuff.
Cold air Intakes are like a short ram Intake, but the pipe extends down to the bottom of the engine compartment or under the car, in an attempt to get the engine colder air. With some cold air Intakes, you will need to worry about hydrolock, or sucking water into your engine. This is very bad because liquids, especially water, do not compress as well as a gas. There are two application specific cold air Intakes on the market for GT and GTS Celicas. The Iceman is now discontinued, but you can still find used versions for sale. The other is made by a Canadian company called Induction Dynamics. You could also build a custom Intake yourself. People have used both PVC and exhaust piping. Exhaust piping will be more expensive, but will look nicer and have better longevity. The decided best size for a normally aspirated Intake is around 2.5, because the stock throttle body is about that size and the Intake will only flow the amount that the throttle body can flow.
Filter Comparison:
http://www.gtrowner.com/induction.html Several popular filter types are compared for a Supra application, but the findings should apply to other applications.
[ December 19, 2002, 12:10 PM: Message edited by: ***Hooligan*** ]
I forgot to add this, but a lot of that stuff will apply to 6th generation Celicas as well (at least the part about the Civic tube and custom stuff).
[ December 19, 2002, 12:11 PM: Message edited by: ***Hooligan*** ]
http://88turbo.4gencelica.net HOW TO BUILD A COLD AIR Intake FOR ANY CELICA
[img]
http://www.4gencelica.net/88turbo/Howto's/intakeparts.jpg [/img]
[img]
http://www.4gencelica.net/88turbo/Howto's/assembled%20intake.jpg [/img]
- Three 2.5 inch hose couplings
o You can get black rubber couplings from Home Depot or Lowes for around $2-$4 bucks
o Or you can purchase silicone hose couplings like I did for around $4-$12 bucks for one. I got mine for $5 dollars each from
http://www.phase2motortrend.com/silcoupstrai.html (the ones I got were identical to the ones that Injen uses for their Intakes)
NOTE: For 1986-1989 Celicas you will need 1 more silicone coupling for the MAF/AFM sensor
- One 180 degrees mandrel bent aluminum pipe, 2.5 inches in diameter
o I purchased mine off JC Whitney for around $30 bucks shipped. , the direct link to the pipes is:
http://www.jcwhitney.com/item.jhtml?ITEMID=4068&BQ=jcw2 Get this one: 180 Mandel-bent Aluminized Tubing, (A/B)=24", (C)=5", ID=2-3/8", OD=2-1/2"
- Six 2.5 inch hose clamps, seven 2.5" hose clamps for 1986-1989 Celicas.
o I got mine from Home Depot for 78 cents a piece. You can find them at AutoZone or Advance Auto Parts or any car part stores.
- One air Intake with a 2.5 inch inlet
o Usually people get the K&N filter because its reusable and its quality. I am using a cheap one that I bought for $10 bucks. The K&N are usually $30-$40 bucks.
NOTE: For 86-89 Celicas you will need to buy a Adapter to bolt a Cone style filter to your MAF/AFM sensor. You can find the Filter & adapter on ebay for about $25
Tools needed
- screwdrivers, both phillip and flathead
- ratchet set to take off bolts and stuff (all you need is a 10 mm socket, because all the bolts are 10 mm)
- well, any tools you think you might need is fine
- A metal cutting saw to cut the aluminum pipe
Approximate time to build and install
- 45 minutes for me to cut up the pipes. I had to do this by a hand saw, so it was very exhausting.
- 20 minutes to take off the old Intake box and that stupid black box in the left fender.
- 20 minutes to drill the hole for the Oxygen sensor. (not needed for 86-89 Celica) This took me forever because I didnt have a drill bit big enough, I kept on having to work to make it bigger.
- 20-30 minutes to install the Intake into the car.
Step One
- Take off your old Intake box and this big black box on the drivers side fender of your car.
o Taking the old Intake box was the easy part, because all I did was loosen all the clamps and unscrew the bolts inside the box under the filter. And unscrew all the other bolts that were holding the Intake box together. After taking off the Intake box, you have to take off the box in the side of the fender. There were a total of three bolts that holds this black box in the fender together. Youll see where it is, you just gotta figure how to unbolt them. The size of the bolt is 10 mm, so use a racket set to do it. After taking that off||..you have to literally jerk the thing as hard as you can for it to come off.
Step Two
- Cutting the pipes as needed.
o First you want to take the U-shape mandrel bent pipe and cut it in half. Half as in right where the curve is, not the other way around. Then you take one half of the pipe and cut that half way down. The other half of the pipe, you only cut about 18 inches off of it. Remember to look at my pictures to see how I cut it. You have to measure the lengths you need, youll have to cut the pipe three times to make it fit. The reason for three hose couplings is because youll have to connect three pipes.
o You should have a total of four separate pipes after you finish cutting them. You only need three pipes though, and those are:
The short curved pipe
The long curved pipe
The small straight pipe
You DONT need the long curved pipe
Step Three
(90-99 Celicas only)
- Drill a hole for the O2 sensor.
o What I did was take a drill and drilled a hold the same diameter as the O2. The hole I drill was perfect but the sensor wobbles too much when I put it in, so I just put a few pieces of masking tape around the O2 sensor and stuffed it back in there. It doesnt wobble anymore. =)
Step Four
- Putting the pipes together (installing your Cold Air Intake in).
o Here is the final part, which is just simply putting the pipes together and stuffing it in your car. First, put one hose coupling over the Intake thing and connect your small curved pipe with the hole for the O2 sensor on it. Put the O2 sensor in before connecting the pipe (Remember to clamp the hose and pipes together with the hose clamps after each connection. Tighten it as good as you can, so they dont fall off or get loose). Second, you want to connect the small straight pipe with the small curved pipe. When doing this, make sure the small straight pipe is away and under the battery so you can connect the last piece to it. Third, connect the long curved pipe to the small straight pipe. The long curved pipe will be coming from the fender and up to the small straight pipe. When doing this, I jacked up my car and got under it to send it from the bottom up. I had another person to help me out doing this part. Lastly, connect your AFM/MAF sensor to the end of the long curved pipe(86-89 only), then attach the Intake filter to the end of the AFM/MAF sensor. You have to reconnect your splash guard, so little rain can get into the Intake filter.
o *NOTE* It might be a good idea to buy an AEM Intake bypass valve for cheap and safe insurance from getting your car hydro locked. The bypass valve usually costs around $30 bucks.
I just edited it to try to get the IMG tags to work. Weird.
-***Hooligan***
[ December 19, 2002, 12:16 PM: Message edited by: ***Hooligan*** ]
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87 Celica GT w/Carlos Sainz ST185 3S-GTE
87 Supra Turbo w/40k JDM engine
85 Toyota Corolla 5door w/20valve silvertop (turbo soon)
Webmaster of 4gcelica.net
halflife52
i have a question
i bought a 92-95 civic Intake off of ebay, i was just sizing it up to see if it would fit without cutting it, but when i tried to connect the hose that connects to the Intake manifold, the hose is too small
so, the hole on my Intake is small, while the hole for the Intake manifold is big, what should i do? i dont think theres a hose that has one end smaller than the other, is there?
btw, im a newb and this might not even be a problem to some people
1992 Toyota Celica ST @ Cardomain.com
So are you saying the Intake pipe is smaller than the throttle body?
...or is the PCV hose the wrong size?
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a question, it may sound really dumb, but I just wanted to make sure. When you do your own CAI, in order to smog the car you have to put the stock airbox back in, right?
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"smog"?
sorry im not sure what you mean...
ive never seen anyone put their box back in
cai doesnt need a box...
it wont do anything mate
but smog regs
i dont think they are that supid.. or have i got it all arse about.. maybe im too stupid to work this one out
[ December 23, 2002, 10:27 PM: Message edited by: **Doc** ]
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--Doc--
i went to midas, they cut the pipe for free, but they said they didnt have a drill
do you think i can do without my temp sensor? because i have no idea how im gonna drill, i have a hand drill, but its too weak and the biggest bit i have is 1/4 and the faq says 6/8
i heard that you can go without your temp sensor
one last thing, the guy at midas cut it waaaaaay to short and it looks really really small, its pretty much just the bend :| will this effect my car in anyway?
[ December 24, 2002, 03:09 AM: Message edited by: st0n3y ]
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hmm, today i installed the Intake without the temp sensor, the hose that plugs from the pipe to the engine is kinda tight so i just barely got it on there
anyways, it might just be cause im paranoid, but i smelled gas or something after i drove around for like 3 secs, so i stopped and put the stock on back in
is it because i didnt put in the temp sensor? the hose needs to be put on all the way? or is it because im just super paranoid?
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doc, America has stupid ass emissions laws, requiring us to get a smog check every few years, to see if our cars polute too much. I know that the CAI has no box, I was just wondering if you had to put your stock Intake back in to make it smog legal.
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Yeah its stupid we have so many people with breathing problems and natural wonders of the United States are deteriorating. The Intake shouldn't affect your smog check. I mean, you still have a filter, its still getting air.. I think id be more worried about exhaust modifications than Intake.
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yea, it shouldnt affect it, but I just wanna make sure. I need a concrete answer from someone who knows for sure. I dont wanna go through the trouble of making a CAI if im gonna have to take it out and put it back in every time I smog the mother fucker. Merry Christmas everyone.
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intake has nothing to do with smog. the Intake doesn't produce emissions.
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also, i may have found out that the Induction Dynamics CAI may not be ready yet. I think it's still in R&D.
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Originally posted by Barrett91ST:
yea, it shouldnt affect it, but I just wanna make sure. I need a concrete answer from someone who knows for sure. I dont wanna go through the trouble of making a CAI if im gonna have to take it out and put it back in every time I smog the mother fucker. Merry Christmas everyone.
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You're in Cali, the most regulated State in the union. You can count on them giving you a hassle if you go in for emissions inspections like that. But dude, it's only once every year or 2 -- it's not that much work. So what. All us all-trac guys swap our midpipes back in for test so we can show we have catalytic converters.
Originally posted by halflife52:
intake has nothing to do with smog. the Intake doesn't produce emissions.
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Oh really? If you buy (or create) a CAI that doesn't reconnect the pcv line as the stock Intake pipe did, then you're dumping those gasses to atmosphere.
IMO, keep the pcv line connected always, but definitely use a catch can mid-line to filter out the gunk. You can even route that line to your cold air box (if you've made one), rather than into the side of the Intake pipe, if you're sure that a side port on the pipe may cause too much turbulence.
hey i have my Intake on my car right now and i have nothing connected to the 02 senser i just attached a bunch of breathers. do i need something attached to the o2 senser i'm not runnin nos and if i do need this o2 senser hooked up where is it cuase i haven't got a clue
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Originally posted by Tartan:
quote:
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Originally posted by halflife52:
intake has nothing to do with smog. the Intake doesn't produce emissions.
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Oh really? If you buy (or create) a CAI that doesn't reconnect the pcv line as the stock Intake pipe did, then you're dumping those gasses to atmosphere.
IMO, keep the pcv line connected always, but definitely use a catch can mid-line to filter out the gunk. You can even route that line to your cold air box (if you've made one), rather than into the side of the Intake pipe, if you're sure that a side port on the pipe may cause too much turbulence.
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that's different. that's the PVC, not the Intake itself that is producing the emissions. the Intake takes in air, it doesn't produce harmful gases. when the air is mixed with fuel in the engine and combusted, then gases develop. you don't see smog coming out of an Intake, do you? no, it comes out of the exhaust, because Intakes take in (relatively) clean air, hence the name "intake."
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www.garageband.com/artist/BAD [
garageband.com]
Black As Day website
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to be a true total 5th gen Intake, something must be added to pertain to the 3sgte
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Originally posted by halflife52:
that's different. that's the PVC, not the Intake itself that is producing the emissions. the Intake takes in air, it doesn't produce harmful gases. when the air is mixed with fuel in the engine and combusted, then gases develop. you don't see smog coming out of an Intake, do you? no, it comes out of the exhaust, because Intakes take in (relatively) clean air, hence the name "intake."
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Yes, I understand quite well. My point was, we were on the subject of passing emissions inspections, and I wanted to warm people about certain Intake setups that do not retain use of the pcv line.
I'm quite familure with Toyota engines, I own: (2) 3sgte; (1) 3sge; (1) 20r; (1) 22rte; (1) 3vze; (1) 5vzfe-supercharged. But thanks for the education.
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quote:
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Originally posted by Tartan:
But thanks for the education.
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no problem i was just pointing out that the Intake itself isn't producing emissions.
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actually, it does have to do with emissions, because your ECU dumps more gas into the fuel mixture to make up for the air, therefore producing more exhaust. SO i think that a cold air Intake that isnt carb certified, will make your car not pass smog.
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Originally posted by halflife52:
also, i may have found out that the Induction Dynamics CAI may not be ready yet. I think it's still in R&D.
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True, should be set for around Spring it seems,
Peace,
TRD Terror
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quote:
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Originally posted by st0n3y:
i went to midas, they cut the pipe for free, but they said they didnt have a drill
do you think i can do without my temp sensor? because i have no idea how im gonna drill, i have a hand drill, but its too weak and the biggest bit i have is 1/4 and the faq says 6/8
i heard that you can go without your temp sensor
one last thing, the guy at midas cut it waaaaaay to short and it looks really really small, its pretty much just the bend :| will this effect my car in anyway?
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Use the stock OEM gromit from the top of your airbox, drill a hole that makes the diamiter of the inside ridge of the gromit, then insert it onto your new Intake, and inser your temp sensor... the temp sensor is a VITAL part of your Intake setup...
Peace,
TRD Terror
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quote:
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Originally posted by Barrett91ST:
actually, it does have to do with emissions, because your ECU dumps more gas into the fuel mixture to make up for the air, therefore producing more exhaust. SO i think that a cold air Intake that isnt carb certified, will make your car not pass smog.
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From my understanding, the emissions test takes a per unit mesurment of different substance quantity in that unit...
If you have 100 feathers, and the test is to see if you have what part of white and what part of black feathers, and the test just takes 5feathers, out of the 100, you can have a box of 500feathers, they test still only takes 5 feathers...
the Intake if anything will give you a more full combustion and burn off any raw gas etc and make a cleaner burn...
Peace,
TRD Terror
Last edited by Tommy91GT; Jun 23, 2004 8:58am.