Has anyone put cone filters on instead of the airbox? Normally I wouldn't bother doing this on a vehicle but I dont like the idea of both turbos sharing 1 single air box especially if theres any turbo failure.

I know this will not appeal to the majority but in reality are there any downsides other then potential heat soak? I would buy proper cone filters not just 15 quid amazon specials so filtration wouldn't be an issue

Downside is they’re usually oil media which kills MAF sensors.
I’m just curious, why would sharing an airbox be an issue if there’s a turbo failure? 2011 RRS HSE Luxury 3.0 TDV6 Fuji White on Ebony/Ivory
Born and raised in So Cal. Moved to the UK in 2018 for a few years. Now in Poland and looking at moving back to the UK.

My question too - the turbos share an air filter and that's it. Once the air is on its way to the compressor it's separate and once it's gone through the compressor then the air filter is irrelevant. How would the air filter change the outcome of a turbo failure?

From memory, the two sides of the inlet manifold are connected to allow for balancing so if there's going to be cross contamination following a turbo failure, it can happen in the inlet manifold anyway, assuming the valve is open. 2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed

Ive purchased 2 quality air filters that are not oil saturated for filtering so shouldn't kill the maf.

I have a friend who's turbo failed and the air box was completely full of oil, literally dripping and the air filter was completely clogged. I can only assume the only way that is physically possible is if the failed turbo has leaked oil into the intake side of the turbo and then the working turbo has sucked the oily air from the failed turbo back up the intake path and back into the airbox and then sucked it through into the good turbo.

I know it won't prevent turbo failure but it shouldn't be as catastrophic if I do experience a turbo failure if they both have independent air intakes.

This seems very odd. The direction of airflow is filter down to turbo. There should be no way for air to flow back. I thought the turbos on the TDV6 are below the level of the airbox so oil couldn't flow down either.

Sharing an intake between the 2 should make no difference. I don't think I've ever heard of a single case where one turbo has taken out the other.

This sounds like making a false assumption based on partial data and then acting on it. I'd want further investigation into how the oil got there first. 2021 L494 D300MHEV Autobiography
2019 Discovery Sport D180 HSE

If one turbo has failed and is not spinning but leaking oil the working one will blow air "the wrong way" thought the bad ,stalled turbo and up into the airbox. Always listen to old people or when they die you will live on in ignorance.
The avatar is a picture of the man with a big cock.
Learned to 4x4 on 100 mile beach and Frazer Island QLD
Dont spend money on old cars you will never get it back

If they're plumbed that way, then presumably there's no way to separate them for 2 separate intakes? 2021 L494 D300MHEV Autobiography
2019 Discovery Sport D180 HSE

who knows mine is a 2.7 Always listen to old people or when they die you will live on in ignorance.
The avatar is a picture of the man with a big cock.
Learned to 4x4 on 100 mile beach and Frazer Island QLD
Dont spend money on old cars you will never get it back

41jules1967 wrote:

If they're plumbed that way, then presumably there's no way to separate them for 2 separate intakes?

I fitted the 2 cone filters. If you unbolt the mafs from the air box the maf has a lip that is perfect for a 70mm air filter to fit straight on to so no additional pipe work ir required and they fit with just the air box lid removed. I do need to make some sort of bracket to keep them from wobbling and keep them further apart but that's not a big task

I do agree thats its all based on assumptions but I spent a full day just thinking how on earth can that much oil get into the air box. I did wonder if it was a pcv fault but the pcv vents right next to the nearside turbo intake so thats too far away and too low to travel into the air box if someone had gone faulty in the pcv system. The only way I can think is from 1 dead turbo being sucked by 1 good working turbo.

Im not suggesting anyone else go out and perform this modification but I really think if I have 1 complete turbo failure where it fails to even spin it will prevent my other turbo from dying and hopefully my engine seizing which is what happened to my friends tdv8 after the air box and air filter became full of oil. Given how oily it all was I think its lucky the engine didnt run away.

Just for the record ive driven it with no negative side affects and no errors on the dash so i will continue to use this setup for now.

Im attempting to attach a picture

That fits more easily than I imagined it would - I was thinking about the cone filters that have wide bases like they used to sell in Max Power back in the day .

Be interested to hear about the respective performance, any noise increase, etc. with the new set up. Not something I'd bother doing myself but useful to have info to share if someone else asks the question in the future.  2012 SDV6 - it's missing a couple of cylinders
2008 TDV8 - it was a labour of love and is much missed