 | Home > Maintenance & Modifications > Heater air intake vent |
 
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| Sulisuli Member Since: 30 Oct 2016 Location: South west Posts: 4795   
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The opening in the vent is considerably smaller than the original flat top, but the “ram” effect should have improved it I would have thought.
I have just removed my KBX wingtop and replaced it with a snow cowl I was somewhat unsure about the appearance but I’m delighted with it and the heater output is identical so win win  Click image to enlarge 2015 HT XS 90 2008 SVX 90 2000 XS TD5 90 |
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3rd Nov 2019 8:03pm |
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| mini Anaconda Member Since: 23 Aug 2016 Location: Thames Valley Posts: 783
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That's interesting. I'm not sure how the mechanics of a Puma heater compares to that on my 1989 model, but I would have thought the 'ram' effect would have offset the smaller vent.
Maybe try a snow cowl next.  BORG - Bucks & Oxon 4x4 Response Group
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3rd Nov 2019 8:09pm |
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| L110CDL Member Since: 31 Oct 2015 Location: Devon Posts: 10751 
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I have a snow cowl on my 300 Tdi and have not noticed any reduction of the heat output compared to the original vent
 1996 Golf Blue 300Tdi 110 Pick up.
Keeper. Clayton. |
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3rd Nov 2019 8:47pm |
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| BogMonster Member Since: 05 Feb 2008 Location: Stanley Posts: 400  
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Knock the fanny drain in the bottom of the heater out completely, I have done on several of mine. The drain blocks with mud, and then water sits in the bottom causing misting up. It's completely pointless. --- 2006 Defender 110 SW 300Tdi • 2011 Ford Ranger XLT crewcab • 2015 Defender 110 Station Wagon Utility TDCi |
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3rd Nov 2019 11:29pm |
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| custom90 Member Since: 21 Jan 2010 Location: South West, England. Posts: 20359
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^^^^ I put mine back in after a while and keep them clean.
Reason being is you will draw warm air in and anything in the engine bay if they aren’t present. So I prefer to keep them often cleaned out. $W33T $0U7H3RN $UG4R 🇬🇧🏴🏴🏴🇮🇪🇺🇸⛽️🛢️⚙️🧰💪 |
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3rd Nov 2019 11:34pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8027  
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Ram air has negligible benefit below 90mph Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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4th Nov 2019 7:56am |
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| BenB8man Member Since: 22 Mar 2017 Location: Norfolk Posts: 429 
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I think you're thinking of RAIs and snorkels. |
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4th Nov 2019 5:55pm |
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| jst Member Since: 14 Jan 2008 Location: Taunton Posts: 8027
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No I wasnt, I was thinking back to an engineering project. Cheers
James 110 2012 XS Utility 130 2011 M57 bespoke Camper 90 2010 Hardtop 90 M57 1988 Hardtop |
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4th Nov 2019 6:35pm |
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| BenB8man Member Since: 22 Mar 2017 Location: Norfolk Posts: 429
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Ah apologies.
I assumed you were thinking back to the project that Pete from BAS did on different air intakes vs Ram air effect.
I'm sure I've heard a few people say that the little air scoops for the heating were quite good, I doubt they were talking about it above 90mph. |
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4th Nov 2019 8:14pm |
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| Chris86 Member Since: 15 Jul 2014 Location: South Yorks Posts: 789 
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I Have a snow cowl fitted- great at keeping leaves out.
Prior to fitting the blower was like an asthmatic blowing through a straw. Its still very much like an asthmatic blowing through a straw but doesn't smell of rotting vegetation now. Chris |
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4th Nov 2019 8:37pm |
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| htb2 Member Since: 02 Nov 2018 Location: Carmarthenshire Posts: 529 
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At least its better than a Series 3 one, which is in a low pressure area at speeds over 60 and sucks air out of the heater.
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4th Nov 2019 8:38pm |
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| ericvv Member Since: 02 Jun 2011 Location: Near the Jet d'Eau Posts: 5816  
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Interesting. When I had my standard intake grill, I had some airflow from the ventilation/heating even without turning the fan on. That airflow increased with speed of course. Now with my snow cowl ( same as yours) I have zero airflow at any speed without using the fan. The fan works perfectly at either of its three positions, just like before, so it is not a case of any blockage, just means that the Entreq snow cowl kills all ram effect. Not a problem, just different from your experience. Eric You never actually own a Defender. You merely look after it for the next generation. http://youtu.be/yVRlSsJwD0o https://youtu.be/vmPr3oTHndg https://www.youtube.com/watch?v=_GtzTT9Pdl0 https://www.youtube.com/watch?v=ABqKPz28e6A https://www.youtube.com/watch?v=rLZ49Jce_n0 https://www.youtube.com/watch?v=XvAsz_ilQYU https://www.youtube.com/watch?v=K8tMHiX9lSw https://m.youtube.com/watch?v=dxwjPuHIV7I https://vimeo.com/201482507 https://www.youtube.com/watch?v=ZSixqL0iyHw |
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4th Nov 2019 8:57pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17380
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I think that the shape of the wing means that there is no ram effect with the heater input since the location of the intake, midway along the flat upper surface, will be in an area of low pressure. Before fitting my snow cowl, my heater would deliver a small amount of air without the fan on (probably due to the coanda effect) but with the snow cowl then there is no air without the fan. There is however also no smell of decay and decomposition either.
Airflow or lack thereof is not a problem as far as I am concerned, I just leave the fan on speed one (or above) if I want air, and at least if I don't it is easy to switch off without having to use the recycle setting. Overall the heater on the TDCi continues a long tradition of functional inadequacy that has been an part of Land-Rover ownership since 1947. I only hope that the new Defender also has a completely dysfunctional heater in order to maintain the tradition. |
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5th Nov 2019 10:50am |
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| rallysteve Member Since: 10 Feb 2014 Location: Cumbria Posts: 2227 
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 very true, i fitted a rubber fin onto the rear of the intake on my Series 3 and it made a huge difference to the airflow at speed.
Steve 02' 110 TD5 Double Cab Rebuild Thread |
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5th Nov 2019 11:04am |
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