Freelander 1 TD4 Extreme Air Filter Housing Mods

FlatbedPilot · Sep 1, 2017

I've been playing about with the rocker cover on my spares car as part of a project to modify the induction system. I've cut away all the plastic that doesn't need to be there (well, it does need to be there if you want to use a standard air filter) for the mods I envision.

Before:

After:

On the engine. Look how much room there is at the back of the engine now.

Now I need to find a solution to connect the oval turbo intake to standard round pipe.

FlatbedPilot · Sep 1, 2017

Measurement of the oval intake gives a circumference of 270mm. I think that this equates to a circular inside diameter of 86mm if my maths is correct. That being the case if I could get hold of 86mm ID hose it would fit over the oval intake. Hmmm, time to go looking for what's available.

Nodge68 · Sep 1, 2017

What are you hoping to achieve by removing the filter housing?

hd3 · Sep 1, 2017

d'nno about D.P. ..
but here .. less swearing when changing the air filter would be nice
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shall follow this thread with interest

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FlatbedPilot · Sep 1, 2017

Nodge68 said:
What are you hoping to achieve by removing the filter housing?

Not a lot. I'm just messing around with a spare car where it doesn't matter what I do. The end goal is a simple induction system that is easy and quick to remove and that gives more room under the bonnet for other maintenance. I also absolutely hate the air filter as designed because I find it a PITA to refit the cover. It's not the best designed piece of kit and it gets in the way of doing anything down the back of the engine. And I like changing things and experimenting. I'll update the thread as I go along and when I'm happy with the fitment I'll try it out on my daily.

Arctic2 · Sep 2, 2017

It only takes 5 minutes to remove the filter cover and replace ? it also helps protect the maf sensor.

FlatbedPilot · Sep 2, 2017

Arctic2 said:
It only takes 5 minutes to remove the filter cover and replace ? it also helps protect the maf sensor.

Five minutes is a very long time to take a filter cover off and put it back on again. It takes seconds to do it on my Defender. I find that the two fasteners at the back of the cover are always difficult to get back in. One of them on my wife's Freelander just won't line up at all so I always leave it undone. My back doesn't thank me for spending long periods of time in a bent over position with my arms outstretched either.

Arctic2 · Sep 2, 2017

DefenderPilot said:
Five minutes is a very long time to take a filter cover off and put it back on again. It takes seconds to do it on my Defender. I find that the two fasteners at the back of the cover are always difficult to get back in. One of them on my wife's Freelander just won't line up at all so I always leave it undone. My back doesn't thank me for spending long periods of time in a bent over position with my arms outstretched either.

Five minutes is a figure of speech, it really is less than that, trouble you are having with your wifes FL cover would most likely be with the rear bolt drivers side, most of the time the plastic cover channel as been damaged by owners trying to force the cover on if it did not go on at first, also the bolts nearest to the driver which sits in a recess must be the one that is lined up and then nipped up only then do the rear corner one, followed by the top ones, link below

https://www.the75andztclub.co.uk/forum/showthread.php?t=200017

Nodge68 · Sep 2, 2017

I must admit. I don't bother trying to fit the 2 rear bolts. I have actually taken them out of the cover altogether. They serve no real purpose as far is I can tell. The filter is sealed against the MAF anyway, so only clean air can enter the engine.

FlatbedPilot · Sep 2, 2017

I think the cover may be warped as well. The one that won't line up is several mm out when the other ones are tightened. But this is only a secondary consideration anyway. At the moment this is an experiment to see how much I can simplify things. I will carry on regardless.

Can't access the linked thread as I'm not a member of that forum.

Arctic2 · Sep 2, 2017

DefenderPilot said:
I think the cover may be warped as well. The one that won't line up is several mm out when the other ones are tightened.

Can't access the linked thread as I'm not a member of that forum.

Yes sorry guys I posted the how to locked thread this should work
https://www.the75andztclub.co.uk/forum/showthread.php?t=200016

hd3 · Sep 2, 2017

Yes sorry guys I posted the how to locked thread this should work
https://www.the75andztclub.co.uk/forum/showthread.php?t=200016

nice

that's what happens to mine .. that 'channel' gets squeezed together

My back doesn't thank me for spending long periods of time in a bent over position with my arms outstretched either.

same here

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jedi · Sep 3, 2017

Although a bit fiddly I dont have any problems refitting mine, if its not lined up correctly it wong fit properly..... Simples

FlatbedPilot · Sep 9, 2017

Some parts came today. Quick mock-up.

Nodge68 · Sep 9, 2017

While that looks like something from Fast and Furious. Picking up hot air from inside the engine bay is a performance disaster. The standard Freelander intake uses a cold air pickup from outside the engine bay. It does this to get as much cold air in as possible. While keeping noise and costs to a minimum.
Simply sucking hot air from above the turbo

won't allow the engine to breath correctly. That small cone filter will also clog much faster than the large paper one the factory fitted.
Give it a go and see for yourself

FlatbedPilot · Sep 9, 2017

Nodge68 said:
While that looks like something from Fast and Furious. Picking up hot air from inside the engine bay is a performance disaster. The standard Freelander intake uses a cold air pickup from outside the engine bay. It does this to get as much cold air in as possible. While keeping noise and costs to a minimum.
Simply sucking hot air from above the turbo won't allow the engine to breath correctly. That small cone filter will also clog much faster than the large paper one the factory fitted.
Give it a go and see for yourself

It's a work in progress. I've considered these points and I have plans. The filter is washable.

rob_bell · Sep 15, 2017

I reckon a better option would be to connect the MAF inlet directly to a snorkel style air intake system, perhaps with the cone at the end of the long intake pipe in the clean, cool air outside the engine bay?

hd3 · Sep 15, 2017

i imagined a cylindrical a.f. housing replacing the flat section of the
stock air intake ..
then a curved tube leading to the maf intake
no idea the clearance between manifold top surface to
underside of bonnet ..
found a site that had virtually every type of housing / filter used on road vehicles
and farm tractors .. but now lost the site link 'n can't find it via google either
( fergot company name )
there were a few potential suitable offerings .. size dependant ..
could find a filter cartridge to suit 'n diy construct a housing ..

meanwhile i'll put up with the stock housing .. p.i.t.a. that it is
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Freelander 1 TD4 Extreme Air Filter Housing Mods

FlatbedPilot

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FlatbedPilot

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Nodge68

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hd3

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