Thread: modified/upgrade/performance air filter box

Looking to Snorkel the D2 and whilst I have a perfectly good safari out the back have come back to looking at the Nissan Option with custom piping due to the breathing issue.

The sizing of the Nissan box
• Diameter : 24cm
• Inlet / Outlet : 90mm - 3.5"
• Base Top: 23cm
• Box Height: 15cm
• Box Height With Pipe: 24cm


Whilst the overall dimension of the D2 Box, taking into account the ridges and brackets

• Width: 28cm (across the engine bay) + 6cm for inlet
• Length: 30cm(down engine bay) - not including the outlet
• Height: 27cm - from base to top
• Height: 21cm - from cut out to top


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The concern is the forward aspect of the bottom of the airbox with the cut out due to the shaping of the under bonnet, but thinking maybe just cutting a piece of checkerboard alum to flatten the area and place / fix the airbox to that.

Happy to cut the plastic around the sensor and glue / rivet that to the new one. The inlet pipe shown below would actually become the outlet pipe.

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This sort of shows pretty much what I am looking to undertake as to the snorkel it self except cutting and running it 'inside' the panel as much as possible with 4". This would require moving the bonnet sensor and drilling out the inner guard as well.
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Approximate shape of the Nissan in the area with outlet towards the current exit

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Interesting...

Keep in mind - look at the inlet diameter of your Turbo... you will reach the point of no returns = given a stock airbox with a few mods is good for 200bhp and more torque than the driveline can handle, there is a point where placebo kicks in

Better filtration certainly wont be a bad thing!

Finished mine off today works wellDE8FC9AE-FDE6-4459-85B6-267E5FB0E35D.jpg

Originally Posted by Kaaaiju

Finished mine off today works wellDE8FC9AE-FDE6-4459-85B6-267E5FB0E35D.jpg

Fantastic to see it does fit!! Just looked the demon up and it has a different base, do these use the standard patrol filter or are they a different size?
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Did this fit into the standard holes or was this modified?

It looks like on you pic that there is a safari snorkel rather than the metal piping that you had along with the outlet looking like a round orifice not the oval.

That being the case have you found with the different air box that the safari actually breathes well enough with the larger inlet and outlets on the airbox? would love to have a look at this install

The base fits just needs some new holes and panel beating

The black part of the safari is still oval as standard and just made it fit to a round tube

The hose at the turbo end, did you wrap the silicone yourself? Doesn't look "off the shelf". Great install BTW.

Originally Posted by Kaaaiju

The base fits just needs some new holes and panel beating

The black part of the safari is still oval as standard and just made it fit to a round tube

Just did some more measurements and the outlet of the Airbox is 3" from the internal smallest diameter and this comes to a circumference of approx 27cm. The oval intake and the intake to the front panels have a circumference (outer) of 28cm so basically an oval 3" circle if you get I mean!

The Safari snorkel at the inlet (basically the only place that is round) is 3" although the 'volume' of the main chamber appears to be bigger than this, hmmm.

The Patrol intake is 3.5" so have you used a reducer to connect the pipe to the 'safari'? The picture looks like two different silicon tubes. Would a 90 degree 3.5" reducing to 3" work?

As per you pic, it would appear that it does not require relocation of the bonnet alarm or the power steering ace reservoir as you had done previously as the silicon connector between the air box and out to the snorkel would be able to be compressed somewhat to fit, would you agree?


Know for mine which a different position of the turbo intake
Loved how you mentioned panel beating, are you talking about thumping the ridge down as it appears that height is not necessarily an issue with the top of the airbox below the level of the radiator.




Would Think I will be a using a reducer off the air cleaner and recut the pipe the pipe to the standard inlet for simplicity of keeping the vac outlet and the catch can inlet/


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