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MySofty Profile
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Date Registered: 12-2010
TOTAL POSTS: 10
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Airflow path


Hi all,

I've attached a pic of the airflow "path" on my E30.

Image

As a matter of intrest - what is the black box I circled in red?
Has anyone ever tried removing the first bit (unplug at the "blue" joint), in order to allow air in via the bigger hole that is left after the removal? Thus skipping the first "green" part.
I also noticed that there is a "fork" just after the "blue" joint which allows air in from the bottom fender area.

Just wondering.
16/Jan/2011, 6:39 pm Link to this post Send Email PM   Send Private Message Blog
 
Translucidus Profile
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X-TRAIL LEGEND
 


Date Registered: 05-2010
Location: Adelaide
TOTAL POSTS: 599
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Re:


The small cavity circled in red is a resonator that quietens the induction system. A bit like a muffler in the exhaust.

You may find there is more than one of these in the intake system. I know on my T31 there are three, inlcuding a large one just beyond the small one you highlighted and under neath the main tube.

---
2007 X-Trail T31 ST-L

Xy going vertical at Bendleby Station . . .

16/Jan/2011, 9:42 pm Link to this post Send Email PM   Send Private Message
 
Revhead Kev Profile
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X-TRAIL HOLIC
 


Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 5406
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Re: Airflow path


I have done numerous and extensive modifications to the intake system of the T30 Xtrail and can tell you the following ...

- the red circled part is a resonator designed to qieten the intake noise.
- the T near where the green part joins at the blue mark goes to a larger resonator/water catcher and not to another air intake.
- the green part has the same cross-sectional area as the blue part so volumetrically they are the same.
- the mouth at the green part actually gathers air pushed in from under the front lip of the bonnet from infront of the radiator.
Adding a scoop as I have shown HERE will help force more air into the intake when in motion.
- removing the green part and having the hole at the end of the blue part will only have the engine sucking hot engine-bay air.
This will degrade engine performance since hotter air contains less oxygen per cubic meter than colder air.


---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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16/Jan/2011, 10:12 pm Link to this post Send Email PM   Send Private Message Blog
 
MySofty Profile
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Date Registered: 12-2010
TOTAL POSTS: 10
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Re:


Thanks for the input guys. I did remove mine to test and did not make an improvement. Possible worse actually as you suggested with the hot air.

I know about cold air intake mods. But has anyone ever concidered ducting some air from the car's airconditioning to the intake? emoticon

quote:

Adding a scoop as I have shown


I had a look at your link but did not see any comment on increased pefrormace. Did it help?
17/Jan/2011, 1:05 am Link to this post Send Email PM   Send Private Message Blog
 
Robbo0001 Profile
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Date Registered: 07-2008
Location: Brisvegas, Australia
TOTAL POSTS: 1063
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Re: Airflow path


Venting cold air from the aircon system into the intake, will in no way offset the power losses caused by having the aircon on, in the first place.
That compressor, being turned by the engine, draws way more power than could be replaced by the cold air.
I thought about extending the suction line off the compressor, coming from the evaporator in the dash. Passing it several times around the intake tube to cool the air. But the gains would be negligibe, in my opinion, for the work involved.
Really need a turbo, and ideally a water to air intercooler...instant results at low and high speeds.

---
Dave
99 GU Patrol 2.8TD
Ex-2002 T30 TI Xtrail
17/Jan/2011, 6:53 am Link to this post Send Email PM   Send Private Message
 


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