[reasonably] cold air intake for n/a?

[George]

Just figured out how to run computer diagnostics on my 1jz-ge (jzx100,vvti,conversion) and found out that intake air temp is bloody terrible.
With outside temp as low as 15C, I have 60C in traffic jam, and some 50ish when cruising. ECU noticeably retards ignition and worst thing is, it also closes the throttle, so with pedal to the floor it's only 60% (with 80% being maximum ever).

{For those unfamiliar with ETCS-i, 80% at maximum is ok. The setup has nothing to do with plain ETCS butterfly found on pre-1998 cars. It looks like this
http://s3.images.drive2.ru/car.journ...e8b5-large.jpg}

When doing conversion I could not fit jzx100 air filter and its air duct, but I noticed that parts from lexus LS430 would suprprisingly fit better, yet still with heaps of troubles.

So two obvious questions arise:
1 - what temperature drop it's reasonable to target? So I don't waste extra efforts for nothing. Tips are welcome, especially if they come with pictures
2 - can someone name any compact air filter design that would be ok for 200hp at crank? Best option is something JDM stock, Toyota being primary option.

[CrUZida]

With a proper intake (ie, one where you are not breathing engine bay air, or very little of it), your intake temps should only be 5-10degC above ambient.
Use any Toyota airbox (or any other manufacturer for that matter) and pipe the inlet to the box to the outside of the engine bay (ie behind the headlight or into the inner guard)

[George]

Thanks for the numbers! A couple more questions. Which is the best option for obtaining outer air from? On many cars air is taken just above the radiator, which would heat the air in traffic jam situations, I suppose.

And can you name some particular Toyota donor for maximally compact filter design? Best option if it has round intake air port (or multiple smaller ports) so it could be mated with custom welded (say 3") piping. I couldn't fit any stock "outer" air duct so I ultimately have to weld/glue/etc my own one.

I found out that JZX stuff is way too big to fit (height is the restriction), and UCF30 filter is almost ok. Round filters boxes off old Hiace, Landcruiser etc with 5VZ fit yet better.. but just like with the two above, there's some pain with supplying fresh air to them, i.e. inconvenient intake air ports

[CrUZida]

I wouldn't worry about the increase in temps during a traffic jam, etc. At low loads the engine can handle high intake temps.
Once you get moving the temps will come right down.

Regarding an airbox, try a Crown or Cressida box (JZX81 is not usable though as its rectangle), MX83 is good.

[George]

Looks like MX83 box is square ported as well? http://imageshack.us/photo/my-images/522/img8849og.jpg/
I need something like this
http://www.autopartswarehouse.com/de...QV3118047.html

p/s searching ebay revealed yet more interesting thing
http://www.mr2turbo.info/pics/intake.html

[boxh34d]

Any reason you have to have stock?
Simota do an enclosed pod filter with suction ducting. There are probably others available as well.
Check out http://www.simota.com.au/ and look in the air filter kits section.

[George]

boxh34d stock used JDM parts are available and cheap, delivery prices are reasonable.
Stock airbox accepts stock filtering elements readily available anywhere
And hey mine is only 200hp, no reason for something fancy, I just need cold air )

But thanks, I will check out the kits section, maybe it will give me some idea
p/s this one is the thing
http://www.simota.com.au/HTML/HTML%2.../sim-CB655.htm
I'm afraid it would cost half of my car when delivered in my area :-)

[Dan_k36]

4wd snorkel haha, land cruiser, pardo,
Come on would be fun, I have seen it before toooo

[George]

Not an option in my area!!! But when driving upside down, snorkel would suck the lowest hence the coldest possible air, that's quite an idea!!!

[thechuckster]

a flat panel filter might help you fit a filter into a smaller space?

It's not a 2j but I'm using a Corolla filter box for my RA65 project, wedging it into the space behind the driver-side headlight and then ducting the outlet to the throttle body.


edit: if you feel brave enough to cut some holes in the inner guard - an ST162 to ST185 FWD (3SGE or 3SGTE only) Celica airbox. Is rectangular shaped, has AFM mount at one end, inlet to airbox is from underneath and at the other end. The 4WD model would flow enough air for 200hp but they're similar boxes & filters to the non-turbo engines.

[George]

thechuckster some free space in your post suggests a picture is supposed to be there, but I can't see any
Currently looking at USDM Tundra airbox. It doesn't seem to look huge and it has the right in/out port configuration, shape etc. Yet it supports possible future swap to 1UZ-FE =)

There are places where I can cut holes without any worry, just thin sheet metal, but the higher the holes the easier it's to find the place to cut.

p/s yours looks nice but the picture doesn't give idea on input configuration and height...but overall it promises a nice fit, thanks
https://lh5.googleusercontent.com/_q...110515_008.jpg

[Supra967]

You might find your temps are from heat soaked piping rather than intake air? Like Cruz said they probably drop once you get moving.

[George]

Definitely not the case. As my starting post says, when cruising around I get something about 50C

[Duk]

Check out http://autospeed.com.au/ for heaps on DIY cold air intakes.

[George]

Duk thanks! Looks promising. Would check it out in details this weekend
p/s eventually came to the following options
1 USDM Tunrda airbox+drill hole in the car
2 USDM JZA80 Supra (2jz-ge) filter+cold air duct => no holes, it takes air from hood gap
3 DIY airbox+welded 3" cold air duct

Since JZ/UZ swap becomes common to a car like mine I would easily sell unneeded things )