AUSTRALIAN X-TRAIL FORUM :: Performance & Tuning :: Factory intake - addition of heatshield wrap & proposed intake modifications

Australian X-Trail Forum Performance & Tuning
Factory intake - addition of heatshield wrap & proposed intake modifications

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jalalski Profile
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Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100

Re: Factory intake - addition of heatshield wrap & proposed intake modifications

Shawn,

In regards to the extractors, I'd rather have them ceramic coated for a much better and more durable result.

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19/Jan/2008, 8:31 am

basshead Profile
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X-TRAIL HOLIC

Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852

Re: Factory intake - addition of heatshield wrap & proposed intake modifications

Update (not really emoticon

).

I bought three IN/OUT thermometers with 3m leads from eBay and they arrived last week ($31 including postage from Newcastle).

First test will be to check for consistency between all three of them (to see if they all measure the same in/out temperature at the same location in the house) and I'll use the two that are the closest.

Then I'll put the outdoor sensors in various places in the engine bay to test for changes in temperature based on air-flow, heat-soak etc. I'll put up results in this thread as progress is made...

Edit: 1 of the sensors reads about 0.4 degrees lower than the other two, so I'll use the two identical ones for testing. Not that 0.4 degrees really makes much of a difference as I expect the differences to be about 10-15 degrees apart. I might even use all three to get simultaneous measurements at 3 different points along the air intake...

Last edited by basshead, 30/Jan/2008, 6:04 pm

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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.

28/Jan/2008, 4:20 pm

basshead Profile
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852

Re: Factory intake - addition of heatshield wrap & proposed intake modifications

This morning before the Forum BBQ I started to run the sensor wires through the firewall grommet (the same hole as I used for the amplifier power cable and the UHF antenna cable) only to find there wasn't enough room left to fit the probe through! I had a think about it today and decided to remove the amplifier cable as I doubt I'll ever get to connect it up again for quite some years (not wanting to deafen baby Joshua). So after the Forum BBQ, I set about installing the temp gauges. I decided to put all three in (even with one being a little out-of-calibration) as it'll give me more options to play with for testing. I made up a bodgey mounting plate (plywood and double-sided tape) which is installed in the empty cavity/shelf above where I had already installed the UHF radio (the DVD player compartment in the Ti models) - photos to come shortly.

I'll add more posts after I do proper real-life testing (like Brett did in the other thread).

Preliminary testing after installing and the engine has had several hours to cool down is:

Factory Dash Guage - 32 degrees
Guage 0 is at foglight cover (cover removed, sensor placed in the centre of the foglight hole) - 29.9 degrees
Gauge 1 is in centre of factory air intake duct opening (not all that far away from the factory temp sensor gauge in front of the horn) - 32.2 degrees
Guage 2 is inside the factory ducting, at the T-joint where the large resonator box is located - 34.5 degrees.

It's probably worth mentioning that I noticed perhaps half an hour after getting home that the inside of the factory intake duct (near the opening) was quite hot - that could be due to a number of reasons - the radiator is directly below it, and also with no air-flow through the ducting, it was still experiencing heat-soak from the hot engine bay (even with the heat-shield I covered it with). The heat-shield material is alot thinner than what I have used on my previous car, so perhaps that could be some further testing I could do - add more layers of heat-shield material to see if it helps keep the heat out of the ducting...

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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.

2/Feb/2008, 7:56 pm

basshead Profile
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X-TRAIL HOLIC

Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852

Re: Factory intake - addition of heatshield wrap & proposed intake modifications

I did a little bit of testing today, although nothing out of the ordinary as it was quite a cool day. I expect to get alot more variance on a hot day.

Start temperature (engine cold) = all within 2 degrees of each other - 18-20 degrees).

Stopped (idling approx 2 minutes @ red light) -

Dash = 19 degrees
Sensor 0 (foglight hole) = 20.0
Sensor 1 (front of factory intake) = 33.3
Sensor 2 (mid-way factory intake (at T-joint above large resonator box) = 28.1

After parked for 1 hour -

Sensor 0 = 27.0
Sensor 1 = 45.3
Sensor 2 = 41.3

After parked for 2 hours -

Dash = 19
Sensor 0 = 20.4
Sensor 1 = 27.2
Sensor 2 = 35.9

After 2 minutes of driving in 50 zone and through roundabouts etc (stopped for a maximum of 15 seconds) -

Dash = 21
Sensor 0 = 16
Sensor 1 = 18.6
Sensor 2 = 21.6

After driving 2 minutes in 70 zone continuously -

Dash = 19
Sensor 0 = 16.7
Sensor 1 = 18.1
Sensor 2 = 19.6

After driving 2 minutes in 60 zone continuously -

Dash = 18
Sensor 0 = 15.9
Sensor 1 = 17.0
Sensor 2 = 18.5

From these results it appears the factory intake location seems to be effective, except when stopped for any period of time. The foglight location seems to be alot better for consistent (expecially while stopped) cooler intake temps compared to the factory location.

Now to do some more testing on a hotter day, and buy some ducting to see if the mid-point sensor records any lower temperatures while stopped at traffic lights.

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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.

9/Feb/2008, 2:21 pm

waky53 Profile
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Date Registered: 06-2005
Location: Barossa Valley
TOTAL POSTS: 286

Re: Factory intake - addition of heatshield wrap & proposed intake modifications

You would expect the factory intake to get hotter when stopped as all the heat from the radiator area will be spreading out & there is no cool air being forced in as there is while the car is moving.

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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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9/Feb/2008, 11:52 pm

basshead Profile
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852

Re: Factory intake - addition of heatshield wrap & proposed intake modifications

quote:
waky53 wrote:

You would expect the factory intake to get hotter when stopped as all the heat from the radiator area will be spreading out & there is no cool air being forced in as there is while the car is moving.

That's right Dave, which is why I anticipate using the fog-light location for the main intake to remove the high intake temperature, but at this stage I do not know if the factory air intake ducting is contributing to the high temperature mid-duct (engine idling revs gradually sucking hot air from radiator through duct), or if it's just heat-soak from the surrounding air in the engine bay.

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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.

10/Feb/2008, 8:27 am

Revhead Kev Profile
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Date Registered: 10-2006
Location: Mona Vale, Sydney, AUSTRALIA
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Re: Factory intake - addition of heatshield wrap & proposed intake modifications

A combination of both I would say Rich.

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Kev X450(c) T30 Guru
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10/Feb/2008, 12:40 pm

BRETT72 Profile
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Date Registered: 10-2005
Location: Orange. NSW.
TOTAL POSTS: 1999

Re: Factory intake - addition of heatshield wrap & proposed intake modifications

Rich. Do you intend to plumb into the base of the standard air box with some 'flexi' hose and run it through the hole next to the battery and down to the fog light. Just be mindful that some of this 'flexi' hose, has small splits that allows the hose to flex. I did have some heavy duty stuff off a large Caterpilla crane, but threw it out during the last collection day. It was thick, but pliable. Just be mindful that the thin stuff will give added heat soak along it's length.

You seem like a man possessed with this modification mate. Good luck with it. emoticon

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BRETT72 - X235

10/Feb/2008, 12:43 pm

basshead Profile
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852

Re: Factory intake - addition of heatshield wrap & proposed intake modifications

I hadn't thought of plumbing right through to the factory airfilter box; I was only intending on connecting new ducting to the t-piece above the large factory resonator box. I expect there to be some turbulence at that point, but I'm not necessarily after creating a "ram" type effect, just purely getting cooler air into the intake. I also don't expect the large factory resonator box to be affected by heat-soak as it's outside the engine bay.

I'll add your suggestion to the list of things to try.

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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.

10/Feb/2008, 1:57 pm

basshead Profile
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Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852

Re: Factory intake - addition of heatshield wrap & proposed intake modifications

Yesterday I wrote down some more temperatures. It was much hotter yesterday than other days I've taken temperatures.

Sitting in traffic (Canterbury Rd, peakhour stop-start) with A/C turned on:

Dash - 33 (constant)
Sensor 0 - 33.7, 35, 34
Sensor 1 - 49.6, 52, 53.5
Sensor 2 - 52.3, 54.1, 55.3

(different temperatures above taken approx 30-60 seconds apart)

Then immediately after rolling @ 20kph for approx 100m:

Sensor 0 - 29.7
Sensor 1 - 49.0
Sensor 2 - 54.1

You can see sensor 0 (@ foglight) doesn't get affected by engine-bay temps (or not as much as other locations), and quickly drops about 5 degrees once I start moving, whereas the other locations need more speed & time to be affected.

It's worth noting that as soon as I stopped rolling that 100m or so, sensor 0 jumped up to 40+ for about 20 seconds - I assume probably due to the heat from the engine bay and/or under the car, moving forward/turbulence into the location of the sensor.

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Rich. X-013(c)
'04 S2 ST Auto. Nudge_roofracks_tow_tints_Lightforce_GME_YokoGeoA/T-S_TBS_bashplate_50mm-spacer-lift
Click here to see >300MB of photos and videos All For His Glory.

16/Feb/2008, 8:46 am

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