A cold air intake idea

[cleong]

Thought crossed my mind - the stock airbox has its merits for everyday driving, being quiet and all. It sucks air from behind the front headlamp.

If you wanted to go out at night for some spirited driving, or at the track on the weekends, it still sucks air from the same place.

I am thinking of rigging up a cold air intake to the blanking plate for the front foglamp. I wouldn't use it all the time, just when I am feeling a bit more frisky than normal. I am told a CAI drags in quite a lot more garbage than normal as well, so I won't keep it open all the time.

I would remove the stock airbox's snorkel and just plumb the CAI into the airbox itself. Or return everything to stock and just cap the foglamp cover back.

Could be fun for a DIY project, given I've removed the bumper before.

[eTiMaGo]

I'm not 100% sure what you mean, but a removable tube that connects the airbox to the foglamp hole in the bumper? How would you go about engaging/disengaging it?

I'd say go for it, it would basically be a very low cost alternative to a replacement intake, or even a guideline for people with some sort of short ram intake to get some fresher air in. I was actually considering a small hood scoop, but this would be far more stealthy!

[Kaotic Lazagna]

i think a member here did something very similar to what you have in mind.

[cleong]

Ok, in the sequence of what I want to do:


Cold Air Intake:
--------------------
1. Remove bumper. Prise off the left side foglight blanking plate.

2. Remove snorkel from stock air box.

3. Fit tube from opening left in stock air box to where the foglight opening is in the bumper.

4. Put snorkel and foglight cover away.



Normal:
----------

1. Replace the foglight cover in the bumper.

2. Move cold air intake tube away from airbox.

3. Replace standard intake snorkel.

[Meteorite Man]

If you're into plumbing and have the room, put a "butterfly valve" down towards the bottom intake. Doesn't have to be huge. I was vacuuming the pool and I shut one valve out of two to keep better presure and suction to the vacuum head. It's looking pretty easy to install, you'd just reach up under or through the engine bay and give it a twist. Or......have you ever seen the valves they use on motorhomes and campers for the waste tanks? It's just a slide that when you pull the handle towards you it opens and then push it away it closes. It's sealed.

I've seen the butterfly valves in different sizes at the pool supply place.

[Turbo&Auto]

More and more people with CAI's or SRI's on 05+ Toyota's are having lean conditions!! Get a scan tool or something when you try it. Something with the DBW system is not liking intakes.

[Spades]

I didnt actually change the MAF sensor position. I have a 07 sedan and I fiberglassed off the factory opening on the airbox(on the sedan it opens up right into the engine bay). I cut two openings in the airbox and used aluminum sheets to direct cold airflow to the box, then used aluminum diamond plate to seal off the whole airbox from the warm air of the engine bay. I threw in a drop-in K&N air filter and called it good.

Should have gained a couple horsepower without causing the dreaded CEL's.



EDIT: this method also eliminates the sucking in of alot of the road grime and garbage you get when you put the airfilter way down below the bumper where it gets water and god knows what else up the intake tube. It is a way to keep the MAF in the same place and not get CEL's, to keep your air filter cleaner, and to still have the benifits of good gas milage, the proper air to fuel mixture, and the horsepower and sound of a CAI.

[Turbo&Auto]

The problem isnt the MAF location its the increased air flow. Increased airflow = higher MAF output voltage = different fuel trims. Too far from stock causes funky changes in the long and short term trims.

Nice setup though :)

[drecian]

I've run that setup with the cold airbox feed on another car ('00 Mazda 626; 2L 4cyl) and didn't seem to have any problems. I covered the pipe opening wiht a fine wire mesh to stop any leaves and debris, but checked the air filter frequently and didn't seem to dirty up any faster. I did it with the 3in silver flex tubing and found it to give a little better power in the top end (but dyno verified :P) and a meatier induction noise. Could have problems if you drive in dusty conditions or lots of water (1ft deep?), but everything seemed to be alright on my old car. If you're concerned, I guess you could just end the tubing in front of the wheelwell and put another cheap cone/pod-style filter on it; anything to draw air further from the radiator would help I guess.
I'll probably do the same on the Yaris when I have the time, can't really beat it for value ($20?).

[Turbo&Auto]

I understand it worked on another car, the problem is this car though and its drive by wire system. For some strange reason the DBW cars from Toyota dont react well to changes in the intake system. At least with the Matrix. I cant see how it would be different for this car though, same setup just different tuning for the engine.

Does anyone have a CAI and a wideband O2 sensor on their Yaris???

[tmyers82]

Heres an idea

[redyaris]

oh i see a lock coming on this thread.

[KSIbucky]

Originally Posted by tmyers82

Heres an idea

That thing is scary

i think that car had a turbo but when some people sell there car they take a lot of those things off

[pp.sweet]

Originally Posted by redyaris

oh i see a lock coming on this thread.

Why would the mod's lock this thread ???

[KSIbucky]

Originally Posted by pp.sweet

Why would the mod's lock this thread ???

ya

[staticorex]

wow. Just wow. I hope that pic was made as a joke. :p

Also, after installing my CAI I noticed the filter is right behind the fog light cap. So on the dyno I removed the cap to see about a difference. None. About 6 pulls with the cap and 6 without. No diff. In case that was close to what you're talking about. :)

[KSIbucky]

i think its to much work i would research a lot before you go with it also we need to know what your talking about

[nick1983]

Are you looking for more of a "Ram Air" setup. That forces air into the airbox?