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basshead
X-TRAIL HOLIC
Date Registered: 02-2004
Location: Panania, Sydney
TOTAL POSTS: 2852
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Factory intake - addition of heatshield wrap & proposed intake modifications
This afternoon after I gave the X-Trail a good long-awaited wash & polish, I had a little time to put on the foam with aluminium foil wrap I bought from USA when I was there in February this year...
While it's not completed yet, I thought I'd put up some photos of how it looks so far. I still need to do the underside of the filterbox, and the little resonator chamber on the engine side of the filterbox, but I don't think I'll worry about doing the huge resonator chamber that is outside/below the engine bay (it's actually in behind the flexible front corner panel). I also need to buy a roll of the air conditioning silver/cloth tape as I didn't have any (I gave all my leftovers to the buyer of my previous car when I finished making up the heatshield for it). That tape will cover up all the gaps and also keep it all in place - I am worried the heat from the engine bay will cause the stuff I've just put on to peel off, as it's adhesive is not very sticky at all.
The foam is approx 3mm thickness; the stuff I used on my previous car was almost identical, except it was at least double the thickness. This product has thicker aluminium - you could almost cut yourself on it; I'd guess it's at least 2 or 3 times thicker than foil; it's almost the thickness of an aluminium can (the old product was more like aluminium foil).
Unfortunately there's probably no accurate way of determining if this is effective. The only way I can think of testing it would be to use a thermometer and see if the intake temperature is maintained all the way to the filterbox, and then set up the thermometer in another unmodified X-Trail (ideally it would've been better for me to have taken some measurements before putting the foam/foil on).
Like I said, I got this product from USA - I wouldn't be surprised if you can get it here - I think I got the old product from Clarke Rubber.
editted 14 Jan 2008...
Have I noticed any performance increase? Probably marginal, but at least I am 90% sure the air getting into the air intake manifold is colder than without the tape-wrap around the ducting
I will be posting up some more recent photos as I have covered the silver-backed foam with silver-backed cloth-reinforced self-adhesive air-conditioning tape (about $12 for a 50m roll from a local A/C supply place on Milperra Rd - called WESTAFLEX).
Editted 30 Jan with a/c tape company details.
Admin Edit: Photos converted to thumbnails to reduce page length
Last edited by basshead, 30/Jan/2008, 5:57 pm
--- 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.
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21/Nov/2007, 9:24 pm
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jalalski
Date Registered: 02-2004
Location: SUTHERLAND, SYDNEY
TOTAL POSTS: 29100
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Re: Factory intake - addition of heat shield wrap & proposed intake modifications
Rich,
You need to keep in mind that any location lower than the factory intake position would require the bypass valve for safer driving.
Given that you're still off-roading, I would shelf this idea all together, as you will be introducing a risk to your exy you can do without, especially having the factory exhaust system set-up. The gains (if any) are not worth the risk and trouble you will be going through.
Your K&N filter and the current heat shield wrap are giving you the best results you can achieve without compromising your off-road drive-ability.
That's just my opinion.
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17/Jan/2008, 7:06 am
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Eggins
X-TRAIL ENTHUSIAST
Date Registered: 08-2004
Location: Brisbane
TOTAL POSTS: 184
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Re: Factory intake - addition of heatshield wrap & proposed intake modifications
Spotties in front of the grill shouldn't matter, there is such a big wall of pressurised air there while driving that it will have no trouble getting around the spotties.
If you found that spotties affected your temp, then there are other bigger problems to look for - like a blocked radiator for instance.
Something that will really help the XT's with extractors, is getting some of the heat proofing wrap that goes on exhausts. Wrap it right from the head really neatly all down the extractors as far as you can go. This achieves a few things:
* reduces the heat in the engine bay
* keeps exhaust gases hot - when they cool they shrink and slow down in the pipe therefore losing some of the "extraction" effect (extractors should be matched to the size of the exhaust ports in the head to help this)
* helps the efficiency of the catalytic converter
You may need a sump guard or bash plate to protect the wrap down the bottom of the extractors.
--- Shawn and Belinda Eggins
2003 STR, K&N, Strut brace, Ground wires, Dunlop LM702's, Tint, Mud flaps, Tow, Nudge, Spots, Mats, Rear scuff plate
http://eggins.synthasite.com/
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19/Jan/2008, 8:20 am
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