Latest catch can empty on my THP 155

[Gazski66]

I am guessing to dissipate the heat so the oily residue stays in the OCC but could be miles off

[Chris_Blue]

Chateau Neuf

Coolant temp is about 105deg under pressure is it not

Heating it up for some reason .. but could be the chateau neuf lol

I'll think

[Czar]

I am guessing to dissipate the heat so the oily residue stays in the OCC but could be miles off

Not a bad guess, not a million miles off, think about what you have written, regarding the heat.

[Czar]

Chateau Neuf

Lovely, enjoy it.

[Chris_Blue]

Dad introduced me to it when I was about 11.
Nice little drop

ED Probably my first ever alcoholic drink, after those Godamnawful dry Sherrys the Grandparents insisted I drunk at 9 years old Ha!

[BeefMasta]

Not a bad guess, not a million miles off, think about what you have written, regarding the heat.

I would guess to make the OCC internal temp a bit warmer to reduce condensation effect that has happened to Chris?

[Czar]

I would guess to make the OCC internal temp a bit warmer to reduce condensation effect that has happened to Chris?

We have success, congratulations BeefMasta.

Not just a bit warmer, a thermal delta of 85° - 130°

[cyclone]

Does water condensing in the can hinder the performance of the internal medium to cause oil in the vapor to fall out of suspension?

[BeefMasta]

We have success, congratulations BeefMasta.

Not just a bit warmer, a thermal delta of 85° - 130°

Yess! Do I win a prize?

[Chris_Blue]

Nice one Beef. Makes sense
Does the heating of the catch can have any other benefits?
I mean, does removing the condensation just make it easier to remove the suspended oil
And this would be %99 of oil. Impressive

Thing is, from the eco point of view, the oil is still there and has to be disposed of, not burnt as the PCV system is supposed to do
But is sounds fab

[Czar]

Does water condensing in the can hinder the performance of the internal medium to cause oil in the vapor to fall out of suspension?

Let's break down what you have just asked;

Firstly, lers go back to basics, the engine is an oversized condensing unit in itself, during its working day it goes through heat cycle phases, we start it from cold, the oil is cold, the water (coolant) is cold, as is the engine unit itself, once the engine has started, the oil, water (coolant) and the engine unit, warm up at different rates, the oil taking the greatest amount of time to heat up, because we have 3 differential thermal deltas taking place at the same time, during this warm up phase the engine crankcase develops condensation, as the oil heats up, equalling the thermal differential working running temperature, the condensation is burnt off.

If you've got your head around that, get your head around the fact that when the engine is switched off, and starts to cool down, the oil, water (coolant) and the engine unit, cool at different rates, this thermal differential once again produces condensation in the crankcase, and the heat cycle has completed its phase.

With that out the way and understood, take some of those elements and let's look at the oil catch can; now it's quite a common myth and some of you will think along these lines too, many believe that their chosen oil catch can, captures all the condensation that their particular engine produces during its heat cycle, this is incorrect, but still remains a common myth.

Important note: you have to remember or be aware, why the chosen oil catch can does not capture all the condensation in the crankcase formed during the heat cycle, it's all down to expansion of the cylinders, piston rings and Pistons, until these components reach their optimum working temperature, the blow by combustion pressure (heat) bleeding down into the crankcase is at its greatest, the firing temperature within the cylinders is approximately 750° this extreme heat very rapidly burns off the crankcase condensation.

99% of oil catch cans are produced from Aluminium, Aluminium is well known for its heat dissipation properties, keep that in mind, moving on, the engine has warmed up, burnt off its heat cycled condensation, your chosen oil catch can is now subject to hot crankcase gas, this hot gas is now passing through your Aluminium oil catch can, as I've previously mentioned, the majority of oil catch cans are completely void of any firm of diverter plate/s emulsion tubes or indeed filtration medium, they rely solely on a change of direction between the inlet and outlet ports, sometimes even at different heights too.

If you've remembered anything from this thread, you should know that a direction change between the inlet and outlet ports is not enough for anything more than at the very best 35% suspended oil entrapment.

Now, does condensation produced by your chosen Aluminium oil catch can hinder any advantage to promote the suspended oil to fall out of suspension ? Yes it does, 99.9% of all aftermarket oil catch cans produced, have not been produced for a specific vehicle, why ? Because all engines generate varying amounts of crankcase pressure (windage) and as such this gives a varying volume of crankcase gas, this volume is a known calculation, and therefore a correct sized oil catch can must be produced to cope with the passing through volume and velocity of the know (calculated) crankcase pressurised gaseous vapour.

You have to get the size of oil catch can correct (volume) capacity in order to not only have a large enough volume, to promote the oil particles to fall out of suspension, from slowing down the gaseous vapour, and large enough to not hinder performance from filling itself, reducing the available volume, due to thermal exchange between the Aluminium oil catch can, which is fantastic at dissipating heat, the hot crankcase gaseous vapour and the cold winter air, these 3 thermal differentials promote your chosen undersized Aluminium oil catch can to sweat (condensing)

Hopefully this should shed enough light on the subject.

[Czar]

Yess! Do I win a prize?

If you think you should have a prize for guessing, shouldn't I get a prize for trying to educate you lot ? LOL.

[Gazski66]

If you think you should have a prize for guessing, shouldn't I get a prize for trying to educate you lot ? LOL.

I do lol, learning a lot thanks Czar

[Jamie@SPTuning]

The Forge catch can tends to evaporate all its moisture due to its location on top of the engines cam cover. Sure they didn't design it to do that on purpose.

[Czar]

The Forge catch can tends to evaporate all its moisture due to its location on top of the engines cam cover. Sure they didn't design it to do that on purpose.

Or maybe the Forge offering just collects little to nothing, as it connects to only the side PCV port, which only opens during boost conditions when the turbo creates more vacuum pull than that from the rear PCV port, as per image below, courtesy of Forge.