Upgraded Puma Airbox

[Tikka7mm08]

Has anyone tried the Allisport upgrade? I’d love a Nugget one but I missed the window for availability :(

[MLD]

Measure the filter effective area of the allisport version. If cylinder use the cylinder area formula. If a panel, measure the heightxwidth. A puma panel is 121 in sq. If alisport version is smaller, you are taking a step back. For example, the patrol 4.2 and 79 series V8 filters are measurably smaller than the puma panel (107 in sq).

another thing to take into account is the snorkel. When i had a mantec snorkel and nugget air filter box, i could hear the engine deep breathing under full noise. Like an asthmatic. With the safari snorkel, the asthmatic breathing went away. Same intake pipe from snorkel to air box.

i’ve done a round of the block and formed view that the factory box/filter is adequate for any power levels the puma can muster up.

[spudfan]

Don't forget to get some spare clips to keep the box closed. Sometimes, if rusted, they break. Part number is WYC100560
WYC100560 | Clip - Land Rover Part WYC100560 (https://www.lrdirect.com/wyc100560-clip)
WYC100560 - CLIP - RETAINING | LR Parts (https://www.lrparts.net/wyc100560-long-retaining-clip-for-air-filter-box-fits-td5-engine-defender-and-discovery-2-also-fits-later-p38-range-rover.html)

[Tikka7mm08]

Measure the filter effective area of the allisport version. If cylinder use the cylinder area formula. If a panel, measure the heightxwidth. A puma panel is 121 in sq. If alisport version is smaller, you are taking a step back. For example, the patrol 4.2 and 79 series V8 filters are measurably smaller than the puma panel (107 in sq).

another thing to take into account is the snorkel. When i had a mantec snorkel and nugget air filter box, i could hear the engine deep breathing under full noise. Like an asthmatic. With the safari snorkel, the asthmatic breathing went away. Same intake pipe from snorkel to air box.

i’ve done a round of the block and formed view that the factory box/filter is adequate for any power levels the puma can muster up.

Good points re square area and I'll ask Allisport that question. The other main attraction though is waterproofness. I'm concerned the factory plastic box isn't entirely reliable...?

[spudfan]

I think that if the factory fitted airbox is closed correctly it is waterproofed enough for everyday usage and rain. Cannot comment on wading. I have never seen moisture in mine.

[MLD]

Good points re square area and I'll ask Allisport that question. The other main attraction though is waterproofness. I'm concerned the factory plastic box isn't entirely reliable...?

I've had the Puma over the bonnet deep water with the factory and Nugget air filter box. both times with a sealed snorkel. both filter boxes were dry on the backside of the crossing. i didn't hang around for the engine bay to fill up. if i stopped i would expect both to leak water but if that happened, i'd kill the engine. i'm a bit taller than most. 35" rubber and air suspension that i can lift to + 4". when lifted, the bottom of the door is 700mm off the ground. if you plan to cross water deep enough to potentially wet out the air filter box, you should be taking precautions to minimise damage. wading blanket, rigged up with tow strap and rescue vehicle on stand by. Older i get, less enthusiastic about putting my car bonnet deep in water.

pretty sure Allisport quote the filter part ref. Cross reference it with Donaldson which will give you the specs. that assumes you are talking about their racing air filter housings, not there TD5 replacement housing.

[DazzaTD5]

*there is no performance gain by fitting an aftermarket air box.
*the standard air box isnt water proof as it has numerous holes in it pre-filter.
*if you remove it, remove the cyclonic spool thing, seal up all the holes and its fine.
*when fitting the pad filter I always spray a bead of silicone spray round the seal.

*the standard air filter / box combination is about on par for dust proof. the above spray helps.
*the nugget stuff (alloy one) can be made to be dust proof, but I have only seen one of my customers achieve this because he is extremely particular with detail.
*the plastic nugget stuff is crap and have had numerous ones pull apart where they are screwed together.

*is that very fine amount of dust in the intake going to instantly dust an engine, no its not. consider the oil in the intake will suck up some of it, i'd say most of it, its prolly not going to knock that much off the life of the engine.

*to be fair though, the old style Land Cruiser and hi-lux big arse round one they used for just about a lifetime were a good filter and fitted really well.

[Colmoore]

I had a 2010 Puma w safari snorkel and sealed all holes/weak points and checked air box seal regularly but she still let water in on creek crossings over the bonnet.
Scrubby Creek on Cape Yorke was 1.5m and the puma went into limp mode most of the way across, steam came out of exhaust for a few minutes after exit [emoji51][emoji51]
Id upgrade it……

[MLD]

*is that very fine amount of dust in the intake going to instantly dust an engine, no its not. consider the oil in the intake will suck up some of it, i'd say most of it, its prolly not going to knock that much off the life of the engine..

on one trip to outback Oz with lots of dirt driving, when i got home and inspected the engine, the fine grit had chipped the leading edge of the turbo turbine. Cost me a turbo. granted the lid to the filter housing was not clamped down as it could have been.

I'd add that the nugget perspex lid does not like some degreasing chemicals. I hazzed and cracked my perspex cover with a degreaser i got from Supercheap.

[Tikka7mm08]

Thanks for the feedback. Last night I removed the air box - such a PITA. I took out the impeller (quite a blockage I thought) and dremeled the intake inside the box to free it up. Will drive this morning and see if any difference including placebo effect!

192473

[Tikka7mm08]

After a drive through town and highway - no noticeable increase in loudness (some report that, but my truck is already with decat/straight pipe to turbo to tail) and felt I could hold longer in 2nd/3rd gear. I have a BAS map, I'm thinking the ECU will just adapt to the change if any change at all (beyond my mind!).

[Tikka7mm08]

Turbo blanket added.

https://uploads.tapatalk-cdn.com/20250122/c115061157b92f1681d5c51884530a35.jpg

[Tikka7mm08]

Measure the filter effective area of the allisport version. If cylinder use the cylinder area formula. If a panel, measure the heightxwidth. A puma panel is 121 in sq. If alisport version is smaller, you are taking a step back. For example, the patrol 4.2 and 79 series V8 filters are measurably smaller than the puma panel (107 in sq).


Here is the feedback from Allisport re surface area, they say their surface area measurement of a standard TDCi air filter is approx. 58.5 inches square: "Our AS293 filter has a surface area of approx. 99.2 inches square."

I'm not sure why there is a difference?

[shack]

Surface area is a lot more than filter size.

It's the total surface area of the filter material.

[Tikka7mm08]

Well I have no idea - Allisport sounds a lot better to me than standard.

[MLD]

Here is the feedback from Allisport re surface area, they say their surface area measurement of a standard TDCi air filter is approx. 58.5 inches square: "Our AS293 filter has a surface area of approx. 99.2 inches square."

I'm not sure why there is a difference?

I'm doing an LS conversion and went through the exercise of comparing air filters. This is my data. I'm sticking with the Puma filter and modifying the box for the LS intake piping.

air filters and air filter boxes


K&N uses this formula


A = effective filtering area (EFA) in square inches
A = (CID x rpm) / 20839


CFM calculator for 402 CID @ 80% effic @ 5500 rpm—> ~525CFM; @ 6,000 rpm ~560CFM. LY6 & 4L80 was programmed to shift at 5,000 rpm. Factory LY6 redline 6,000 rpm.


402 CID at 5500rpm = 106 sq inch; @ 6000 rpm = 115.7 sq in - assumes low dust city driving. Off road and country driving is a multiple of 1.5. thus 157 sq in and 172 sq in


5.3L (323CID) at 5500rpm = 411 CFM or 85 sq inch; @ 6,000 rpm = 450 CFM or 93 sq inch


LS1 commodore 289mm x 229mm x 24mm (158 cm 3) - EFA 103 sq in


Puma 290mm x 270mm x 40mm (313 cm 3) - EFA 121 sq in


Silverado 2500HD (6.0L) 318mm x 251mm x 41mm (327 cm 3)


VDJ (79 series) 307mm x 228mm x 52mm (363 cm 3) EFA 107 sq in


VDJ (200 series) 300mm x 311mm x 60mm (560 cm 3) - EFA 144 sq in


GU patrol (TD4.2) 176mm OD; 92m ID; 126mm H - EFA 107 sq in


Silverado Duramax 335mm x 241mm x 80mm (645 cm 3)


Ford F series 6.7 TD 357.6mm x 171.6mm x 105.5mm (640 cm 3)


LS7 (GM 25940997) for Z01 - donaldson (850 cfm)


2500HD (6.6 duramax) 2017-19 - 279mm x 279mm x 76.2mm (


patrol aftermarket filter box - 24cm diam - 90mm inlet & outlet (360 cfm)


for round filters use:




H=(A/D*3.14)+0.75
A = effective filtering area
H = height
D = outside diameter of the filter
3.14 = pi
0.75 = the rubber end caps



to convert CFM to sq Inch, divide by 4.8.

[Tikka7mm08]

Having driven mine for a couple of days now after the airbox mod I'm also going to stick to the Puma airbox. My truck is a lot less asthmatic on acceleration (quieter).

[Tikka7mm08]

Exhaust wrap added. Horrible stuff to work with.

https://uploads.tapatalk-cdn.com/20250124/0ac0ce84d4909ce3d5f7a83603e610e6.jpg
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https://uploads.tapatalk-cdn.com/20250124/8be3e482426fed49263de4a45f251600.jpg
https://uploads.tapatalk-cdn.com/20250124/f6ff06097227c6a6c949ee986f846082.jpg

[Tikka7mm08]

Posted it on the FB puma group and one guy reckons fire risk. I can’t imagine too much of a risk as the wrap is from the turbo back <650.

[DazzaTD5]

Posted it on the FB puma group and one guy reckons fire risk. I can’t imagine too much of a risk as the wrap is from the turbo back <650.

Well thats crap, correct me if I am wrong but the wrap is made of some sort of woven glass fibre, pretty fire proof.
I used that gold wrap for many a years without issue, but as you say itchy to fit and expensive, but it will do the job.

Also what you have done looks very neat and tidy.

[shack]

I'm no expert, but is that a hot dog next to the exhaust pipe?https://uploads.tapatalk-cdn.com/20250125/c5932de36498892c4e4d90e3dccb6e07.jpg

[Tikka7mm08]

I'm no expert, but is that a hot dog next to the exhaust pipe?https://uploads.tapatalk-cdn.com/20250125/c5932de36498892c4e4d90e3dccb6e07.jpg

Yep sausage dog - loves riding in the Defender.

[Tikka7mm08]

https://youtube.com/shorts/52POCAg8Qdg'si=4__QFcGHFTx-r5qz

Tried to catch an offcut of exhaust wrap on fire.

[DazzaTD5]

https://youtube.com/shorts/52POCAg8Qdg'si=4__QFcGHFTx-r5qz

Tried to catch an offcut of exhaust wrap on fire.

that was a great simple test

[rick79]

guys...why not support Aussie made?!

DEFAB - PUMA SEALED AIRBOX
– KINGPIN Fab (https://kingpindesignandfab.com.au/products/defab-puma-sealed-airbox?_pos=2&_sid=e01f230ef&_ss=r)

If you are not a fan of dryflow filters, you can always get a cone filter with paper element also
192519
192520

[Tikka7mm08]

I’d love a defab air box but funds are in -ve at present!

I am staggered how smoother, quieter the truck is running after the box and wrap mods - it is also now consistently in single digit L/100km, and my truck is way off standard.

[HardCharger]

Question, this has a duckbill at the bottom for draining any possible fluid ingress, but won't this be an ingress point as well for any deep wading applications?

While my hardcore off roading days are behind me, I still use the truck for disaster relief and assistance operations. I also recover others that get themselves stuck as well.


guys...why not support Aussie made?!

DEFAB - PUMA SEALED AIRBOX
– KINGPIN Fab (https://kingpindesignandfab.com.au/products/defab-puma-sealed-airbox?_pos=2&_sid=e01f230ef&_ss=r)

If you are not a fan of dryflow filters, you can always get a cone filter with paper element also
192519
192520

[Tikka7mm08]

https://uploads.tapatalk-cdn.com/20250128/1853b2f63cebe9c1b77fc030b338ac9e.jpg
Pic.

[DazzaTD5]

I do like the scan gauge 3, nice display

[scarry]

https://uploads.tapatalk-cdn.com/20250128/1853b2f63cebe9c1b77fc030b338ac9e.jpg
Pic.

What is CHT on the Scan Guage?

I use an Ultra Guage on the Tojo,only the Scanguage 2 was available at the time.
I think the Scan 3 is now better,particularly as you can set alarms,which i can on the Ultraguage as well.

The alarms have already probably saved my son an engine,after a rat chewed through a coolant pipe on his LC76....

[discorevy]

What is CHT on the Scan Guage?


Cylinder Head Temperature? possibly an additional sensor outside the head measuring metal temp, but displayed in Fahrenheit for some reason?. I'm guessing though.

[Tikka7mm08]

Cylinder Head Temperature? possibly an additional sensor outside the head measuring metal temp, but displayed in Fahrenheit for some reason?. I'm guessing though.

Yes correct, and only in F from what I found. Have to enter a code to get it to pop up as the gauge doesn’t list it. Doesn’t matter as ultimately you are looking to stay in a range of temp whether DegC or F.

I had the Ultragauge (sitting gathering dust now) in workshop. The SGIII is a good piece of gear and touchscreen.

[DazzaTD5]

What is CHT on the Scan Guage?

I use an Ultra Guage on the Tojo,only the Scanguage 2 was available at the time.
I think the Scan 3 is now better,particularly as you can set alarms,which i can on the Ultraguage as well.

The alarms have already probably saved my son an engine,after a rat chewed through a coolant pipe on his LC76....

CHT - cylinder head temp, the 2.4 has a sensor at the back of the head

[Robmacca]

CHT - cylinder head temp, the 2.4 has a sensor at the back of the head


Yes and if I remember correctly, cuts in at about 114 degrees

[Tikka7mm08]

Sub 9 mileage.

https://uploads.tapatalk-cdn.com/20250130/9bdeb89e554ac8cbdf460f44b45e7c93.jpg

[TonyC]

Sub 9 mileage.

https://uploads.tapatalk-cdn.com/20250130/9bdeb89e554ac8cbdf460f44b45e7c93.jpg

Your fuel remaining, distance to empty and fuel consumption don't match 🤪

On a serious note, have you compared the Scangauge L/100 to working it out from pump and odo?

I assume your can get longer term L/100, not just daily.

Tony

[Tikka7mm08]

Yep it updates as you drive… the further you drive the more settled the figure is… it does instantaneous but I’ll have to check if the SG can track across a tank. That said, that is home to work drive so I have seen quite a change. Measuring off this week’s full up tonight it is 10.48L/100km.

[V8Ian]

What size is that screen?

[Tikka7mm08]

What size is that screen?

not sure but Unit Dimensions 12.7 x 8.1 x 2.55 cm

[rick79]

Question, this has a duckbill at the bottom for draining any possible fluid ingress, but won't this be an ingress point as well for any deep wading applications?

While my hardcore off roading days are behind me, I still use the truck for disaster relief and assistance operations. I also recover others that get themselves stuck as well.

Duckbill valves on airboxes are designed to let water drain out while keeping contaminants from getting in, but their safety for deep water crossings depends on a few factors:


Pros to running a duckbill valve in your airbox:



Automatic Drainage – They let small amounts of water escape, preventing accumulation in the airbox.




One-Way Function – In theory, they should only open when there's water inside and the engine is off, preventing anything from entering.



Cons & Risks:


Material Wear Over Time – If the rubber gets stiff from age or damaged, it may not seal properly. Ive seen duckbills on std defender airboxes than I care to count that are so old and stiff they are not only stuck open...they're as stiff as a board.
Positioning Matters – Depending on the airbox location and the location of the duckbill valve on it... water pressure could force it open. This is not an issue for the Defab Engineering one.



Safe Usage Tips as always!:


Inspect it before a trip with deep water crossings – Make sure the duckbill is sealing well and not stiff or cracked.
Consider a Manual Plug – Some off-roaders block the duckbill during crossings to prevent any chance of water ingress, then reopen it afterward.