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Old 04-07-2002, 10:48 AM   #1
mattyb2
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Member#: 17091
Join Date: Apr 2002
Location: Hooksett, NH
Vehicle:
02 ts
green

Default CAI safety?

I just installed a CAI on my 02 2.5 ts. I've been searching through the archives reading peoples concerns with MAF failures, knock, detonation, lean and rich conditions, etc. etc. Should I be concerned with these? I retained stock filter and housing. Some threads say to install a different MAF, kandN filter to help with lean state, don't install filter will mess up MAF, so on and so forth. Are these concerns legitimate, do I need to be worried? Will I have any warning signs or indications of failure(check engine light etc.) There is so many contrasting threads, who is right and who is wrong? Or is it just a matter of luck whether or not you'll have a problem. Thanks for your advice.
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Old 04-07-2002, 12:43 PM   #2
Bobalouy
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Chapter/Region: MAIC
Location: Bel Air, MD,USA
Vehicle:
99 2.5rs,BDP,
02 WRX wagon WRB

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The MY99 rs is the only one with a maf so I dont think you have to worry about that, and I think the maf is what caused teh car to run lean also. I have an intake on my 99 with no problems. So I wouldn't worry about it.

Anthony C
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Old 04-07-2002, 02:19 PM   #3
grimlock
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The MY98 and MY99 RS had MAF sensors. The 98 used a hot wire and the 99 used a film. The film in the 99 was a fragile part, and intakes could break it. Since 2000, the RS has used a MAP sensor that's much more sturdy, although perhaps slightly less accurate. You should have no problems with an intake.

Ross N.
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Old 04-07-2002, 02:48 PM   #4
krave
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I've always heard horror stories about CAI sucking up water...My vortech supercharged mustang was designed to pick up air from the fender and it died on me after hitting a big puddle. Until I hear why our stock intake is a big restriction I'll be sticking with it.
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Old 04-08-2002, 01:33 AM   #5
Kostamojen
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matty you have a MAP not a MAF, so any MAF things you hear about dont apply to you.
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Old 04-08-2002, 09:38 AM   #6
Mr. Rogers
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Matty : Your 02 uses a different sensor I belive that the 99's. The only fear I would have is hydrolock as the i-clubber with the mustang pointed out. This is a legit concern, i heard the cobb tuning CAI has a bypass to prevent this. I know AEM makes one and I had one on my last car but I don't recommend AEM for a subie.
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Old 04-08-2002, 02:43 PM   #7
ibis
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Email I got from Josh@Cobb before I bought one from them......


The intake for the RS is the result of many weeks of dyno testing. It uses
a unique in-line filter and carefully selected piping to maximize top end
power, as well as keeping the mid and low end torque that many RS owners
demand, something that most intakes cannot do. It sources air from high up
in the fender so that you do not have to worry about inhaling water, while
still getting the benefits of sourcing cooler, denser air. All of the stock
sensors remain fully functional and it is well within their operating range.
This is a very important design feature that not all intake into account.
So in other words, no fuel computer is needed. The reports you may have
heard are the result of an improperly designed intake.

Do not hesitate to ask if you have any other questions.

Thanks,
Josh
Cobb Tuning
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Old 04-08-2002, 02:54 PM   #8
steppin16
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a friend in a 02 wrx had installed a diy cai and is now haveing problems like a rough idle and stalling and cel I told him to look over the cai for leaks but he says it fine... so i dont know maybe cai might do some damage to the car
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Old 04-08-2002, 04:38 PM   #9
DanzBorin
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Key word is WRX... We are talking about a 2.5TS. The ej25 responds well to intakes, and makes a considerable increase in power.
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Old 04-08-2002, 06:57 PM   #10
Richard L.
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'93 GMC Typhoon AWD

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I don't think the Cobb CAI has a bypass to prevent sucking water. A local owner hydrolocked his motor, which had the Cobb CAI, while driving through ankle deep puddles of water.
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Old 04-08-2002, 10:57 PM   #11
mrbillydee
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Maybe the AEM bypass valve could be used with one of the more popular intakes, like the Cobb, etc?? You can get them seperately for like $40 or $45. Any opinions?
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Old 04-09-2002, 03:56 PM   #12
Jademonkey
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If you hit water hard enough, ANY intake can suck up water.
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Old 04-09-2002, 04:24 PM   #13
jhonas
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Quote:
Originally posted by mrbillydee
Maybe the AEM bypass valve could be used with one of the more popular intakes, like the Cobb, etc?? You can get them seperately for like $40 or $45. Any opinions?
The AEM bypass valve only does it's thing when the opening in the intake pipe is completely submerged. The valves on the bypass valve operate on pressure differences. Pressure differences large enough to cause the valves to open only occur when the intake opening is submerged.

It a good investment for honda/acura intakes, because those put the opening down really close to the ground to get the cold air. In the case of the cobb and other intakes that go into the fender, that's some deep water to get the opening submerged.

I read somewhere that you can hydrolock your car by ingesting something like 3 table spoons of water or something like that at once.

I did some research on this when I was deciding on what intake to get (I ended up getting the .PDM ), and came to the conclusion that it'd be a waste of $40
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