Nugget Stuff Airbox into Defender Puma

[karlz]

Installed a Nugget Stuff Airbox into the Defender (2015) a few days ago.
I already had the Nugget sealed airbox installed into my Safari snorkel, so the job was a bit easier.,
After driving it, it seems like there is more power. Could be placebo effect, but after a few days driving I reckon its gone more power. Got me stumped why.
168193

[Tombie]

Because it’s breathing more air freely, rather than having to fight to pull it in.

[karlz]

Because it’s breathing more air freely, rather than having to fight to pull it in.

Yeah I get it, breathes more easily. But is the original LR box that restrictive?

[Toxic_Avenger]

The filter is the most restrictive part. The stock box and all it's gaps probably alleviate that to a big degree...

After my install, I didn't notice any performance gain, only a bit more induction noise at idle.

[Tombie]

Yeah I get it, breathes more easily. But is the original LR box that restrictive?

Yes it is. The surface area of the factory filter is much less.

Adequate for factory spec, not so good once you ask for more air/fuel.

[MLD]

i didn't notice any performance improvement when i fitted the Nuggett air box (i have his intake kit too to a safari snorkel). I can hear a deep throaty gasp of air from the snorkel under full load (accelerating up a hill). It sounds like a restriction to me, like the intake can't get enough air. I had the mantec snorkel when i first installed the air filter housing and it sent the restriction indicator into the red even with a new filter. The safari snorkel is better as the restriction indicator doesn't go into red with a new filter. If i had the skill and access to equipment, i'd like to do a flow test so see if the system does flow with less restriction. Not saying it is not a good bit of kit but the jury is out that there is less restriction on my anecdotal evidence.

[Tombie]

I fitted the restrictor gauge to the factory airbox pre-fitting the Nugget one and could send it red under moderate load.

I can still pull it close to that now, with a 170 tune and some serious right welly but nowhere near as easily. It now takes a seriously decent load and high rpm.

The gulp you hear is just that - the big gulp as it spools and drags the air in.

[Toxic_Avenger]

i'd like to do a flow test so see if the system does flow with less restriction. Not saying it is not a good bit of kit but the jury is out that there is less restriction on my anecdotal evidence.

Could be achieved for under 10 bucks - a differential pressure gauge (water Manometer) using some clear plastic tube and a plank of wood to mark a scale on would give you a point to point pressure differential.
Measure mm of H2O and can easily convert this to psi / kPa, or your chosen flavour of pressure units
In this particular instance, put a barb fitting into the filter indicator hole, and one in the snorkel inlet. make sure the hose run is long enough so as not to get a filter full of water...

https://www.efunda.com/formulae/fluids/images/Manometer_A.gif

[karlz]

I should note I also have the BAS 170hp mod and intercooler fitted.
I still have the cat, so not sure if Decat would improve things more.
But, again tonight after driving it a bit more, the Defender is faster for sure.

[Tombie]

Similar on ours, except after a series of unfortunate events the cat seems to have fallen off. [emoji41]

[nugge t]

There is certainly increased air flow. The original pipework is the equivalent of approx 75mm diameter pipe. The kit has 90mm pipe and a larger surface area filter.

These engines like a LOT of air. The other restriction is any RAM head/prefilter that draws from underneath.

Must be a factory problem with the CAT as mine fell off too!!! :)

[MLD]

Could be achieved for under 10 bucks - a differential pressure gauge (water Manometer) using some clear plastic tube and a plank of wood to mark a scale on would give you a point to point pressure differential.
Measure mm of H2O and can easily convert this to psi / kPa, or your chosen flavour of pressure units
In this particular instance, put a barb fitting into the filter indicator hole, and one in the snorkel inlet. make sure the hose run is long enough so as not to get a filter full of water...

https://www.efunda.com/formulae/fluids/images/Manometer_A.gif


Mitch - you give me too much credit to even understand your diagram let alone put it into practice.