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Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6092
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Re: Air intake design & modifications


quote:

BRETT72 wrote:
  I have set aside a few long hours to research the net and find someone (ANYONE !!!) who has altered the intake, which is also safe for off-road use.

  I was looking at using some 3" flexy hose to re-route the intake from the bottom of the air filter box, but can't work out a safe place to have the intake opening.

  Back to the drawing board... emoticon



Hey Guys,
How does this look ?
Image Image Image Image

Last night I thought I might try and work out something to help to push some outside air into the stock intake while still hopefully keeping it relatively off-road "friendly".

I also found there are 3 resonators...
- small one on intake tube
- large one in wheel well
- medium one at back of filter box

I managed to tape over the holes for the large and medium resonators, and removed the white baffle piece from the bottom of the filter box to help get better direct airflow through the filter.

I'm interested to see if this has any effect.

---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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18/Feb/2007, 6:44 am Link to this post Send Email PM   Send Private Message Blog
 
BRETT72 Profile
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X-TRAIL HOLIC
 


Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: Air intake design & modifications


Kev,
 
What a top simple idea. Now please explain what you have used to make it. I can't really tell from your pics, but does the 'ramp' you used have an edging to force the air into the original intake and result in less air falling off the sides (just like a slippery dip, but in reverse...sort of ???)

As for the 3 resonators, I have only removed the large wheel well one and the intake one, but not the rear air filter one. Have you noticed any noise increase since removing all these. How easy is the air filter one to cut off.

---
BRETT72 - X235

18/Feb/2007, 10:53 am Link to this post Send Email PM   Send Private Message MSN
 
NPC73 Profile
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Date Registered: 12-2004
Location: Mount Isa, QLD
TOTAL POSTS: 1247
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Re: Air intake design & modifications


Kev,

Great idea, I'm looking at doing something similar right at this very moment, however not as large as that emoticon

My first observation is that I hope you haven't cut off to much air getting to your radiator. emoticon

What I have in mind for myself is to just bring the alloy down to the first opening on the grill only which should not be much of a sacrifice for air flow to the radiator.

---
Noel...
Member ID: X-072 (Retired Administrator)
2003 X-trail, TI, Manual, (Series 1) - (with the works)
2013 Toyota Prado, Manual, Turbo Diesel - (Snorkel-K&N-Full Exhaust, 20" Low Profiles, Chrome Bullbar, HID Spots, + All the Bling!)
18/Feb/2007, 1:32 pm Link to this post Send Email PM   Send Private Message MSN Blog
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6092
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Re: Air intake design & modifications


Thanks guys.

Brett,
I made it from leftover tinplate sheet I had when I enlarged my letterbox recently. Easily found at any hardware.
Yes I have sides in the angled plate with a top lip slipped under the intake scoop to hold it at the top and a bottom lip slipped under the front bumper to hold it at the bottom. Needed simple cutouts to allow all fixing buttons to still fit through.
Here is the template.

Image Image

Started with the 300x300 sheet, then cut the 50x60 squares out of all 4 corners, then cut the diagonals for the foldup sides.
Test fitted to Exy for rough places for all button cutouts and finally cutoff clearance for bonnet catch.

Noel,
I would not imagine I have cutoff any more airflow than a large driving light would.
Infact, because the other side is still completely open as is the main bottom grille opening, I may have only cut off about 15% of the airflow at the most at a guess.

[Admin Edit]: Added alternative version of template with black writing on a white background for easy printing

Last edited by NPC73, 18/Feb/2007, 10:47 pm


---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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waky53 Profile
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Date Registered: 06-2005
Location: Barossa Valley
TOTAL POSTS: 286
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Re: Air intake design & modifications


It might be a good idea, but may be dangerous to the motor in any water crossing. It would direct water from down lower directly into the air intake.

---
Regards Dave, X162 Oct 04 Series 2 ST
Mods Strut bar_Fuel cap holder_earth wires_No door beep_Bonnet Struts_TBS_bash plate_16" Alloys_Rear sway bar_ F&R fogs
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18/Feb/2007, 6:14 pm Link to this post Send Email PM   Send Private Message
 
Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
TOTAL POSTS: 6092
Reply | QUOTE
Re: Air intake design & modifications


quote:

BRETT72 wrote:
Have you noticed any noise increase since removing all these (resonators). How easy is the air filter one to cut off.



Haven't noticed any extra noise Brett.
The air filter resonator I just covered the hole with tape inside the air filter box.
A better way might be to plug the hole by gluing in a sink plug ?
It is easy to cut off completely if you remove the whole air filter box to get to the resonator from the back.

quote:

waky53 wrote:
It would direct water from down lower directly into the air intake.



Thought about this too Dave.
Idea was to drill some holes along the top so that air would still be directed upward and the holes would allow the water to spill through if it got too high.

Anyway, creek crossings should always be done slow otherwise the bow-wave caused by any speed at all makes the height of the water worse than it really is.

Last edited by Revhead Kev, 18/Feb/2007, 9:03 pm


---
Kev X450(c) T30 Guru
03 Titanium Ti T30 Series 1 **MODIFIED**
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18/Feb/2007, 8:57 pm Link to this post Send Email PM   Send Private Message Blog
 
BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999
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Re: Air intake design & modifications


 Kev,
  Mate if I was you, I'd head down to my local solicitor and get this design patented. This idea is so simple and given the inadequate design of the current intake, may result in some good changes to the exy's performance. I can see quiet a few prototypes about to hit the forum soon, resulting in a little piece of aussie workmanship that does this forum proud. Top find mate and thanks for sharing it.

  I have already made 3 different templates to try and can't wait test them out. I am also trying to get a flow meter to see whether this increases the amount of air into the chamber or not.

  Although it has been suggested it may cause troubles with water crossings, it can be easily removed in 10sec. Simple and effective. Love it. emoticon

Last edited by BRETT72, 18/Feb/2007, 9:10 pm


---
BRETT72 - X235

18/Feb/2007, 9:08 pm Link to this post Send Email PM   Send Private Message MSN
 
BlackThunda Profile
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Date Registered: 09-2005
Location: Wishart Queensland
TOTAL POSTS: 1567
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Re: Air intake design & modifications


Kev,

quote:

Kev wrote:

With Jamie having water up over his bonnet in one of the creek crossings he did on the Tag-Along tour last weekend, it would be interesting to have him see if there is any such signs of water getting in to his intake or maybe as far as his resonator



I checked this when I cleaned the car after the weekend and found no trace of water or water residue but did not go too far into the resonator box for indepth look.

---
Jamie & Vicky - X112(c)

(old) Black 2005, Auto ST-X, (Series 2)
(new) 2011 Series 4 T31 T1 (CVT Auto) Diamond Black
(2nd car) 92 Pajero (old but tuff) Red

Black Thunda is the name, splashin' around is the game!
19/Feb/2007, 8:03 am Link to this post Send Email PM   Send Private Message
 
jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29094
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Re: Air intake design & modifications


Jamie,

It was a couple of years ago when I have done the deep water crossing and it was only recently when I installed the CAI and removed the lower resonator box and the air filter box to make way for the new CAI system.

When I looked inside the lower resonator located in the fender area it was full of dry mud traces and I could also see dry mud traces on the base of the air filter box.

Considering I have covered my engine bay and the factory intake entirely when I attempted the deep water crossing, what I have seen proves how close to a complete disaster I was!

I would never take the exy into such deep waters again and I think the safest depth for the exy would be just above the edge of the bumper.

---

19/Feb/2007, 8:17 am Link to this post Send Private Message MSN Blog
 
BlackThunda Profile
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Date Registered: 09-2005
Location: Wishart Queensland
TOTAL POSTS: 1567
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Re: Air intake design & modifications


The water wasn't really that deep, in fact only up to about three quarters of the way up the wheel and the crossing wasn't that wide either. The water over the bonnet was caused by the wave created as I hit the water and given the back of the car was up high we took a nose dive into the water.

I wouldn't take it in deep water for long periods as I could see this as a problem for not only the air but also the electrics in the motor area.

Needless to say, I can understand what you say about the lower resonator and I will check this out.

Is it easy to get to so I can have a look?

Is there a thread dedicated to this? emoticon

---
Jamie & Vicky - X112(c)

(old) Black 2005, Auto ST-X, (Series 2)
(new) 2011 Series 4 T31 T1 (CVT Auto) Diamond Black
(2nd car) 92 Pajero (old but tuff) Red

Black Thunda is the name, splashin' around is the game!
19/Feb/2007, 8:38 am Link to this post Send Email PM   Send Private Message
 


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