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Old 03-28-2004, 10:29 PM   #1
Blue Bomber
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PERFECT CAI (Hybrid Aftermarket Intake/Stock Airbox Mod)

If your car is having bogging and hesitation problems and you have an aftermarket intake (cold air or short ram), this is the answer you've been looking for!

Reason For Bogging/Hesitation
Aftermarket intakes use larger piping (usually 2.75" vs stock 2.5"). This is supposed to allow more airflow, but unfortunately, our mass airflow sensor (MAFS) is tuned to read air through a 2.5" pipe. Increasing the size of the pipe actually slows down the air speed, since our engines can only take in so much air. The lower air speed makes the MAFS think less air is coming into the engine. This results in the engine getting less gas than needed, making it run lean. This will cause the engine to bog at low RPMs, hesitate during normal driving RPMs, and reduce overall engine power output. It can even lead to check engine lights (CELs), with the code of P0171.

Reason Why This Modification Works
This modification replaces the aftermarket intake's MAFS mount with the stock mount. The piping inside the stock mount is 2.5", so it allows the MAFS to read the incoming air correctly and provide the engine with the proper amount of fuel. It combines the best characteristics of the stock airbox (proper airflow speed) and the aftermarket intake (low restriction airflow) to provide maximum power gain.

Will My Intake Work With This Modification?
Yes. This modification has been tested sucessfully on the AEM Gen 1 CAI/eBay CAI, the Injen short ram, and the RMM short ram. It will also work with the Injen CAI/APC Intimidator CAI, K&N CAI and short ram, and PHR CAI. As long as the intake's pipe has a constant diameter, this mod will work. The exception may be the Iceman intake, since its diameter continually changes over the length of the intake.



INSTALLATION INSTRUCTIONS (shown on eBay CAI)

Parts Required

Stock airbox
Aftermarket intake
Flathead and Philips screwdrivers
Power saw or Dremel
Pipe cutter (optional)
File (optional)
Pliers
Epoxy
Power sander
80 grit sandpaper
600 grit wetsanding sandpaper
Spray paint
Knife or strong scissors
45 degree silicone coupler (optional)
Straight silicone coupler (optional)


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Old 07-31-2005, 01:40 PM   #2
oONoGoAutoOo
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awesome guide bat. I'll be doing this mod really soon!!
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Old 08-21-2005, 11:57 AM   #3
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can this mod be used for a short ram too?
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Old 10-26-2005, 12:24 AM   #4
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Quote:
Originally Posted by hawaiianboy
can this mod be used for a short ram too?
Yes of course.
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Old 01-05-2006, 11:24 AM   #5
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that sounds like the solution to all of my problems.....nice post
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Old 01-24-2006, 05:52 PM   #6
00 LSM GTS
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anyone know if this mod passes smog?
this seems like a very good mod. I just want to pass smog with it, when i cut up my only stock intake
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Old 03-11-2006, 06:54 PM   #7
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Quote:
Originally Posted by 00 LSM GTS
anyone know if this mod passes smog?
this seems like a very good mod. I just want to pass smog with it, when i cut up my only stock intake
Doesn't affect emissions any differently then the CAI you're using.
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Old 04-25-2006, 04:44 PM   #8
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Well i got bored, and was tired of check engine lights with my injen sri. So i got on ebay and bought a CAI for 44 bux shipped. I spent about an hour choppin and refinishing my MAF tube, and about a half hour cuttin the new cai. Install took me about 3 hours or less, and im very happy with the results. No more check injen light, barely any bogging, and a bit more noticeable power in 1-3 gears! This mod is one of the best things ive done so far. I gotta give it up to Blue for figuring out this crazy little trick. Although i do need to get a little sound dampening for my wheel well, to block out water, and calm down the crazy loudness on the drivers side from the new cai. Now i just have to give it the test of time, and see how it all goes from here. Ill let ya's know!
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Old 05-03-2006, 11:41 AM   #9
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get a cel light over the weekend, checked it out and one of my couplers seemed loose, tightened it up and reset ecu. Seemed fixed. Now i get another cel light today, kinda gettin pissed off. Gunna go scan the code and see whats up, if u have any ideas, let me know!!!!
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Old 05-03-2006, 11:57 AM   #10
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ok its a p0441, which is a EVAP Emission control system purge flow fault. I have no idea what that means, do u guys have any ideas what would be wrong with my install to set that off, cuz i got that code with my injen SRI also, and i need to get it fixed!!!!!!
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2k Red GT-S 6 speed - TRD Exhaust, BB Modded Ebay CIA, Tein S-tech springs, TWM Short Shifter w/ brass base and cable bushings, Blue Bat's V9 redout kit, SM1 sidemarker smokes, and Reverse light smokeouts, S2000 antenna, TRD Duracon shift knob, 2003 Lower Front grille, debadged top front grille, Alpine Head Unit w/ Euro Single DIN, LED Brake/Parking/Reverse/license plate/dome lights.
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Old 07-22-2006, 02:42 PM   #11
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will this work with the new AEM gen2 CAI.
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Old 07-25-2006, 07:30 AM   #12
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sounds great have the cai and gettin ready to do the mod, but i was wondering how many of you guys have managed this without check engine lights? because i def don't want any of that
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Old 10-09-2006, 12:46 AM   #13
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one question...

the MAF is going to read air from the aftermarket pipe wich is probobly bigger than 2.5

get my drift?
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Old 11-11-2006, 05:58 PM   #14
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[quote=Wakenthefallen]one question...

the MAF is going to read air from the aftermarket pipe wich is probobly bigger than 2.5

get my drift?[/QUOTE

Wrong, the MAF is mounted in the stock location using a piece from the stock intake box. It will be reading airflow at 2.25" dia.

I just did this mod last week and I have to say that it does appear to improve driveability and power. My pulls have been much stronger since this mod and to answer Spikeman's previous question, no I have not had any CEL's nor have I ever.

Nice work Bomber!
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Old 12-11-2006, 09:44 PM   #15
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im planning to do this, great job on a good write up : )
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Old 03-19-2007, 05:59 AM   #16
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Sorry to revive a dead thread, but I performed this mod in the early winter, and through a little swearing and patience I got it to fit right and look good. After driving it I could instantly tell that the hesitation and bogging was gone. My celi is actually a lot easier to drive around town, especially coming out of driveways and intersections. I would recommend this mod to anyone with a CAI or a SRI. I had the latter.
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Old 03-23-2007, 04:14 PM   #17
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I started getting everything ready for this mod.. I don't have bogging problems or anything, just wanted to get rid of the CEL (Check Engine Light) I figured was being caused by the CIA. When I got the stock piece ready and put it up to the Injen CIA I have, I noticed with mine, they were the exact same size around.. Didn't they make a 2nd gen intake specifically for this problem? Just wanting to make sure because I don't think I need this mod.
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Old 03-25-2007, 02:22 AM   #18
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...It's CAI not CIA

and I don't think injen ever made a gen 2? that was AEM...

it's the diameter in the center of the piping that you're worried about,

i did this mod and it got red of my CEL and all the other problems with CAI/SRI's.
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Old 03-25-2007, 03:24 AM   #19
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It's Rid not Red.
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Old 03-25-2007, 02:35 PM   #20
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I did this yesturday and the write up helps alot! No more bogging at low rpms. Thanks
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Old 05-08-2007, 02:50 PM   #21
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i was going to do this mod, i cut the stuck airbox up and everythin and then went to put it on, and happened to notice it looks the same size as my C/A/I. I have a 2000 gt with the AEM dryflow cai. Im guesing this mod doesnt apply to this intake...
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Old 05-13-2007, 01:31 PM   #22
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did this mod and still running lean with some bogging. any help?
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Old 05-13-2007, 02:53 PM   #23
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Quote:
Originally Posted by aznleadfoot
did this mod and still running lean with some bogging. any help?
Check for vaccum leaks.
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Old 05-22-2007, 06:40 PM   #24
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Quote:
Originally Posted by Linko
i was going to do this mod, i cut the stuck airbox up and everythin and then went to put it on, and happened to notice it looks the same size as my C/A/I. I have a 2000 gt with the AEM dryflow cai. Im guesing this mod doesnt apply to this intake...
I haven't done the mod yet but I think they're supposed to be the same size, at least from the outside. Get one of those silicone couplers like the yellow one in the pic and bring the MAF holder and pipe right up to each other inside the coupler. Then tighten them down together. That should do the trip.

BB, am I close or totally off on this one?

Also, did y'all paint the inside too?
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Old 05-25-2007, 11:42 PM   #25
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Great Mod!!! Thanks so much BB. I can really feel the difference and the bogging from 1-3k is gone. It took me a little while to get the exact amount of the CAI cut (3 different cuts) but I finally got it down and installed. Thanks
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Old 06-02-2007, 10:49 PM   #26
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Does anyone have pictures of this mod with a K&N SRI bc i dont understand how it would work? And my celica is bogging really bad its to the point where my car shuts off sometimes and i have the CEL on all the time. So help would be great thanks
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Old 07-10-2007, 12:17 PM   #27
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I installed a BOMZ CAI for a 2003 Celica GT. I am amazed at the sound and how crazy the engine sounds close to redline! You can feel the extra HP at low RPM and especially when the VVT-i kicks in! Im loving it... except the CEL. Now, i did notice alof o boggin at 1st but was quickly corrected after checking for vacume leaks.

I still noticed some hesitation and lag... and like others, Ive yet to mesure the difference in tubing size from the OEM to the CAI.... Im not 100% convinced this would resolve the issue.

Wouldn't racing ECU not turn on the CEL?

Quote:
Originally Posted by shaunfin24
Does anyone have pictures of this mod with a K&N SRI bc i dont understand how it would work? And my celica is bogging really bad its to the point where my car shuts off sometimes and i have the CEL on all the time. So help would be great thanks
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Old 07-11-2007, 11:22 PM   #28
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great mod...did it to a Injen SRI and getting it to fit seems much harder than w/other piping

nevertheless...good stuff
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Old 08-20-2007, 04:34 PM   #29
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Quote:
Originally Posted by Bacci
Im not 100% convinced this would resolve the issue.
If you have low airflow measurements, it will.

Here's what you need to measure to find out:

Should be at spec idle when measuring. If the voltage @ spec idle is below 1.1V, then the airflow measurement is off & you need to mod.
Quote:
Originally Posted by Bacci
Wouldn't racing ECU not turn on the CEL?
A PFC doesn't utilize the CEL. So, yes you're correct.
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Old 09-02-2007, 12:19 PM   #30
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AMAZING MOD!! Great job BB!! No wonder they call it the BBMod. So far so good and it only took about 2 hours to make, install, and test! No more sluggish and no more check engine light. So far so good!!
**How did you end up mounting the CAI when you cut the mount off instead of letting it hang there?? thanks a lot!
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Old 09-07-2007, 01:41 PM   #31
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The CEL is back on after 5 days... maybe something came loose. The work and configuring continues...
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Old 11-06-2007, 10:50 PM   #32
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blue bomber, i don't see the bracket that is supposedly bolted to the vibra-mount. did you cut it off? can the clamps hold the whole cai? i don't want my cai to fall off!
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Old 01-28-2008, 05:25 PM   #33
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Hey guys well i will have to say i have a celica VVTLI import i had a K&N SRI and the engine light was on since then i fitted a AEM CAI with a full custom system with de-cat and lan simulater and a apexi SAFC and few other little bits and bobs but since all this the lights on the dash are all off was all set up at weston performance and is now running 232.4bhp before all these things was 195.4 at wheels but then again this was a import but as i say the light is off but at the cost of almost 3000 pound
now i want to SC it witch means loosing the AEM CAI *LOL*
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Old 01-28-2008, 05:25 PM   #34
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Sorry forgot to add i only just joined so i will put on pics and dino sheets for you guys ASAP
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Old 02-23-2008, 08:58 AM   #35
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This is BS, i've got vacuum p series code ever since install.
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Old 02-26-2008, 02:28 PM   #36
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Resetting Computer

Before buying my Celica I was active on the Saturnalia forums. This question came up often. When you install a CAI on a Saturn you can simply disconnect your battery for a few minutes. When you reconnect it there is a resetting of the computer which adjusts for the new air flow. Does this work with Toyotas? This is how we avoided the CEL coming on.
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Old 03-30-2008, 10:56 AM   #37
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Hey i just Installed a SRI that i bought off ebay it does seem to work great but i am getting the CEL to come on so when i heard about this site i came here and it seems that there is a solution... but i cant see the installation guide on how to do this on this page... there is no link or anything. can anyone help me get this guide?
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Old 03-31-2008, 07:50 PM   #38
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What happened to the pictures/instructions?
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Old 04-11-2008, 09:10 AM   #39
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Why did you delete the install guide BB? I was just getting ready to do this - will you be reposting it?
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Old 04-11-2008, 10:48 AM   #40
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Problem solved:

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Old 06-24-2008, 03:06 PM   #41
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Anybody know what diameter the throttle body is? Its not the same as the stock piing(2.5")right? Is it 3"? I'm just not sure what size straight coupler to get...2.5 to 2.5 or 3 to 2.5. Thanks
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Old 07-25-2008, 01:07 PM   #42
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Why don't they make these intakes with this in mind? Seems like a huge oversight to have to do this to stop the check engine light from coming on... Is there a CEL safe intake out there so you don't have to McGyver your intake like this?
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Old 09-06-2008, 08:41 AM   #43
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Yah i got the same problem, but is their another way to just buy a new Intake without this check engine light problem. Any suggestion ?

thx
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Old 09-08-2008, 07:33 PM   #44
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I got a stock airbox from the junk yard and took of the intake. I paid my mechanic 100 bucks to do all the vacuum work and I'm all back to normal.
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Old 09-11-2008, 11:33 AM   #45
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What is used to seal the MAF sensor that is on the SRI. I understand the CAI because a part is removed but with
(for example) an Injen SRI has the bracket that the MAF sits and screws into what is used to plug and cover this?
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Old 09-11-2008, 07:07 PM   #46
2way
Electromagnetic Wave [:-h
 
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Make a sheetmetal plate & a piece of rubber underneath. Some folks just tape over it.
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Old 09-19-2008, 10:14 AM   #47
DVan8504
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So no one has come across an intake that simply doesn't throw a CEL from the factory? I can't believe no one makes one.
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K&N SRI | S2000 Antenna
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Old 09-26-2008, 04:38 PM   #48
Artimis008
something smells funnyo_O
 
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just finished doing this mod. Great success no bogging on idle and better response! NO CEL..yet haha

A+++ guide!
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Old 09-29-2008, 02:20 PM   #49
bunkkaws84
easy now...
 
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has anyone done this with a SRI, if so, where would you mount the MAF sensor? If you mount it where the CAI does, the MAF sensor mounts in the bent on the SRI, and if you have a weapon R, then it would be mounting where the filter attaches.

Looking at the SRI intakes, it seems the MAF mounts right before the TB. Would this be OK?

Any suggestions?
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Old 04-01-2009, 05:34 PM   #50
sn1p3r845
lolsup?
 
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Can somebody fix this thread?
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