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macduff



Member Since: 04 Nov 2012
Location: NE
Posts: 117
United Kingdom 
Cor4 air intake
Just fitted a Cor4 air intake cover in place of my LR RAI. Decided to try this out after seeing the BAS dyno results the RAIs have on performance , and noticing a distinct lack of go up hill .
Not had a chance to try it out on my butt dyno but heres some pics .
Fitting was very easy once I worked out how to drive the rivnut tool.
I've plugged the windscreen frame bolt holes with the RAI bolts/nut covers until I find a less visible solution, thankfully all my bolts weren't corroded in when I came to remove the RAI, though a another winter may have swung that the other way.

Ps supplied very promptly by LRS offroad

Click image to enlarge


Click image to enlarge 2023 110 P400e
Post #230670 26th Apr 2013 12:51pm
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macduff



Member Since: 04 Nov 2012
Location: NE
Posts: 117
United Kingdom 
A quick spin on the backside rolling road says its not any slower up hills but hard to say its faster. What was noticeable was its a lot smoother drive under 2k revs and quieter? I used to notice the egr chattering a lot on part throttle urban driving, and its seems to be either less egr activity or less noise directed in to cab . 2023 110 P400e
Post #230834 26th Apr 2013 11:27pm
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Thud



Member Since: 21 Jul 2012
Location: London
Posts: 667
United Kingdom 2008 Defender 90 Puma 2.4 SW Zermatt Silver
An air intake cover can make any measurable difference on a defender. I don't believe that for a second.
Rolling with laughter
Post #230850 27th Apr 2013 7:30am
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Go Beyond



Member Since: 30 Jan 2012
Location: Headcorn, Kent
Posts: 6676
United Kingdom 
I agree Thud but I think you'll find it replaced a raised air intake in which case I'm sure there would be a noticeable difference

Love or hate the Cor4 design you have to admire these guys for their innovation and originality Thumbs Up
Post #230852 27th Apr 2013 7:46am
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bell-auto-services



Member Since: 08 Jul 2007
Location: North Yorkshire
Posts: 2232
United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
Thud wrote:
An air intake cover can make any measurable difference on a defender. I don't believe that for a second.
Rolling with laughter


If a Mantek/JLR snorkle is removed to fit the wing vent it WILL make a difference for sure to power and its delivery. I have tested it on the dyno on several cars with shocking results. I dont know if a COR4 one is any better than the factory plastic wing vent but I for sure know removing the snorkle is.


Click image to enlarge


Pete

Last edited by bell-auto-services on 27th Apr 2013 9:00am. Edited 1 time in total
Post #230870 27th Apr 2013 8:57am
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Thud



Member Since: 21 Jul 2012
Location: London
Posts: 667
United Kingdom 2008 Defender 90 Puma 2.4 SW Zermatt Silver
I understand that removing the restrictive snorkel will show flow gains. I'm saying that a flash AI cover is no better than a boggo one.
Post #230871 27th Apr 2013 9:00am
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bell-auto-services



Member Since: 08 Jul 2007
Location: North Yorkshire
Posts: 2232
United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
Prob very true on that note, they all prob do the same as the next just look different.
Post #230872 27th Apr 2013 9:01am
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Cakey



Member Since: 19 Feb 2013
Location: Cheshire
Posts: 468
United Kingdom 2012 Defender 90 Puma 2.2 XS CSW Santorini Black
Since Pete remapped mine with a rai , it has lots of go uphill 47bhp more go Thumbs Up
And if Pete was kinder to his customers mine would have a huge inter cooler by now Big Cry
I like mine it makes me feel rugged Rolling with laughter and its the only thing I will notice when it falls off

Last edited by Cakey on 27th Apr 2013 9:30am. Edited 3 times in total
Post #230878 27th Apr 2013 9:22am
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macduff



Member Since: 04 Nov 2012
Location: NE
Posts: 117
United Kingdom 
Thud wrote:
I understand that removing the restrictive snorkel will show flow gains. I'm saying that a flash AI cover is no better than a boggo one.

I don't doubt that, though I didn't have a stock placcy one, I didn't like the prices of the KBX? ones and following reports of the stock one being held on by a whim I wanted something slightly more permanent Smile
And as kindly pointed out by Pete of BAS it was replacing a RAI, that doesn't do anything useful in the climate/conditions its being used in that I can see (as it doesn't seal the intake from water ingress and I'm not likely to drive a dust cloud anytime soon) - so probably more a fashion accessory than the Cor4 plate that replaced it. Smile 2023 110 P400e
Post #230879 27th Apr 2013 9:23am
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LandRoverAnorak



Member Since: 17 Jul 2011
Location: Surrey
Posts: 11240
United Kingdom 2013 Defender 110 Puma 2.2 USW Orkney Grey
As an added bonus, you'll never be short of somewhere to grate some cheese Mr. Green









Sorry, couldn't resist Laughing Darren

110 USW BUILD THREAD - EXPEDITION TRAILER - 200tdi 90 BUILD THREAD - SANKEY TRAILER - IG@landroveranorak

"You came in that thing? You're braver than I thought!" - Princess Leia
Post #230901 27th Apr 2013 11:35am
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Supacat



Member Since: 16 Oct 2012
Location: West Yorkshire
Posts: 11018
United Kingdom 2013 Defender 110 Puma 2.2 XS DCPU Keswick Green
Laughing

or open a bottle of beer
Post #230946 27th Apr 2013 3:14pm
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rleslie



Member Since: 10 May 2012
Location: Ellon, Aberdeenshire
Posts: 128
Scotland 2007 Defender 110 Puma 2.4 XS CSW Epsom Green
Hey Mr Macduff, you never know when coming round from Tarlair you will need a raised air intake, and the dust clouds off the parks at Myrus!

Surly as long as it looks good and gives some performance gain (even in your own head) its worth it........
Post #235721 15th May 2013 2:05pm
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mick



Member Since: 08 Feb 2010
Location: Yorkshire
Posts: 2109
England 2010 Defender 130 Puma 2.4 HCPU Rimini Red
What I was wondering is if you remove the intake pipe from where it goes into the air box would that be ok and you can keep your air intake on for bling Thumbs Up
Post #235845 15th May 2013 6:30pm
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K9F



Member Since: 12 Nov 2009
Location: Bournemouth
Posts: 9610
United Kingdom 2008 Defender 90 Puma 2.4 XS CSW Stornoway Grey
mick wrote:
What I was wondering is if you remove the intake pipe from where it goes into the air box would that be ok and you can keep your air intake on for bling Thumbs Up


Maybe I've read it wrong but why and what benefits would be had? If you go through life with your head in the sand....all people will see is an ar5e!!

Treat every day as if it is your last....one day you will be right!!
Post #235851 15th May 2013 6:49pm
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GUM97



Member Since: 05 Feb 2012
Location: Cheshire
Posts: 3555
United Kingdom 1997 Defender 90 300 Tdi HT Stornoway Grey
K9F wrote:
mick wrote:
What I was wondering is if you remove the intake pipe from where it goes into the air box would that be ok and you can keep your air intake on for bling Thumbs Up


Maybe I've read it wrong but why and what benefits would be had?

I'm assuming he's referring to the graph above with regards to the lower power. If you remove the intake pipe from air box, then in theory you could keep the snorkel for looks (if you like the look of them!), but not have the reduced power that they cause. I personally don't think it would work, as the air intake is on the outside of the vehicle for a reason. An engine to TDi for!
"Land Rover- Proudly turning drivers into mechanics since 1948"
Post #235856 15th May 2013 6:56pm
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