Solid boost pipe connections

[stevieturbo]

Otispunkmeyer said:

Not up to me. Customer wants/needs it that way for emissions and it's a fairly old engine. Can't really go into more detail unfortunately.

Dirty systems do not improve emissions of ay age.

It's not hard to implement breather systems better, with filtration etc so such oil/vapours will not enter the inlet tract.

OEM's seem quite lazy in this regard and don't seem to care that the inlet's get utterly coked up with ste. Largely because they know it will be fine for their warranty period.....and don't give a toss after that

[poppopbangbang]

stevieturbo said:

Dirty systems do not improve emissions of ay age.

It's not hard to implement breather systems better, with filtration etc so such oil/vapours will not enter the inlet tract.

OEM's seem quite lazy in this regard and don't seem to care that the inlet's get utterly coked up with ste. Largely because they know it will be fine for their warranty period.....and don't give a toss after that

It's a homologation requirement that they enter the inlet as they must be reburnt and managed by the exhaust after treatment accordingly. No homologation requirement in the last decade has allowed vent to atmostphere. It's definitely not a laziness thing as an awful lot of time and money goes into how to manage this effectively as if you don't get it to meet emissions then you can't homologate it which means you ultimately can't sell the car.

[stevieturbo]

poppopbangbang said:

It's a homologation requirement that they enter the inlet as they must be reburnt and managed by the exhaust after treatment accordingly. No homologation requirement in the last decade has allowed vent to atmostphere. It's definitely not a laziness thing as an awful lot of time and money goes into how to manage this effectively as if you don't get it to meet emissions then you can't homologate it which means you ultimately can't sell the car.

And nowhere did I state to vent it to atmosphere.

The same way they go to lengths to filter the exhaust, it is incredibly easy to filter the breather system too. Yes they are lazy.

[poppopbangbang]

stevieturbo said:

And nowhere did I state to vent it to atmosphere.

The same way they go to lengths to filter the exhaust, it is incredibly easy to filter the breather system too. Yes they are lazy.

Really interesting, what do you suggest for filtering the breather system?

[E-bmw]

poppopbangbang said:

stevieturbo said:

And nowhere did I state to vent it to atmosphere.

The same way they go to lengths to filter the exhaust, it is incredibly easy to filter the breather system too. Yes they are lazy.

Really interesting, what do you suggest for filtering the breather system?

Could you not just install an oil catch can?

[poppopbangbang]

E-bmw said:

Could you not just install an oil catch can?

That gets you reasonable seperation of the gasses and liquids (see many OEM PCV solutions these days which use seperators) but not total and you still have to do something with the gasses element - as they're mostly combustion byproducts from ring pack blow by dealing with the hydrocarbon element is the tricky bit hence being interested to know what Stevies solution is.

[stevieturbo]

poppopbangbang said:

Really interesting, what do you suggest for filtering the breather system?

Other than filters like the provent that already exist ? It's not new, it's not difficult, just most manufacturers don't care

https://oem.mann-hummel.com/en/oem-products/crankc...

[poppopbangbang]

stevieturbo said:

Other than filters like the provent that already exist ? It's not new, it's not difficult, just most manufacturers don't care

https://oem.mann-hummel.com/en/oem-products/crankc...

They are a packaging challenge on a lot of applications though, you need at least 350mm above oil level for the recirculation point and you have to deliver the filtered blowby into an area of vacuum or atmospheric pressure which means between air filter and turbo (which the turbo machinery guys get a bit fizzy about). They're also not suitable for some operating regimes where there is little to no stop time as there is at least one mode where they will only drop oil back to the sump when the engine is stopped due to relying on differential pressure to control the none return valve.

They can absolutely work (and work really well), especially in HGV applications, but they're not a golden bullet to everything breather related. On a cost, supply chain, ongoing service, failure mode etc. basis you can end up with better overall viability for production without than with. Everything can be improved and optimised but on the cost > reliability > performance triangle maxing everything generally isn't possible. That doesn't mean the engine guys are lazy or that the manufacturer doesn't care, it's just a reality of production engineering.