Yellow Oil Light

[DuncanR]

But and it's a big but, do you think your car is faster because you have fitted an oil catch tank?

No cos its heavier Lawsy !:hahaha:

Up myself.....That's funny coming from you! How about contributing to the site and becoming a member.......wait, or are you are too good for that?

I think we can excuse people from not noticing that they have been relegated from Bold blue to not so bold, tbh I had missed it myself until a few days ago.
I hate it when we have obviously knowledable people on here, who then sadly fall out over a certain issue.:banghead:
Being a bit fick, I cant comment regards the more technical apsects of this discussion, but I can see the merit of an oil catch can, should anyone choose to fit one, thank you both for your continued contributions, it is appreciated really !... Im off to blow my own trumpets now ! .. bet mine are well gunked up, If i sprayed Sambuca into the intake along with a lighted match, would it burn it off?? :smt102

[cantfind1]

I agree it's not great, and I know it's all emissions bollocks.

I know what the vapours etc will do that's why I said gorilla was being a little pedantic.

But and it's a big but, do you think your car is faster because you have fitted an oil catch tank?

Faster is a whole other question! Who knows, but what I do know is that I no longer have crap entering my intake and fouling it up. A clean engine always works more efficiently than one covered in carbon deposits.

If I ever meet you than you can have a drive and decide for yourself.:thumbs:

[cantfind1]

Hi,

Cantfind1- as you do not like the tone I will
keep this very short and simple for you.

Oil Catch Tank is so that Race Cars do not
deposit oil on to the Race Track. Period.

The clue is in its title.

It does not make any Car faster or perform better
no matter how you want to 'spin it'.

As you seem so far up yourself then I wish you
and your Catch Tank many happy miles
together.

Regards,

The Gorilla.

Up myself.....That's funny coming from you! How about contributing to the site and becoming a member.......wait, or are you are too good for that?

[The Gorilla]

Hi,

Cantfind1- as you do not like the tone I will
keep this very short and simple for you.

Oil Catch Tank is so that Race Cars do not
deposit oil on to the Race Track. Period.

The clue is in its title.

It does not make any Car faster or perform better
no matter how you want to 'spin it'.

As you seem so far up yourself then I wish you
and your Catch Tank many happy miles
together.

Regards,

The Gorilla.

[shane@mbtech]

And Lawsy if you don't think that removing oil vapour and carbon from your intake helps your engine run better and cleaner then why bother cleaning the trumpets at all??

I agree it's not great, and I know it's all emissions bollocks.

I know what the vapours etc will do that's why I said gorilla was being a little pedantic.

But and it's a big but, do you think your car is faster because you have fitted an oil catch tank?

[cantfind1]

Hi,

The 'volume' of Oil particles returned
to the Plenum which are then subsequently
''re-used'' would not make any difference to
the Octane of the Fuel entering the
engine whatsoever.

Oil Vapours do not have the ability to
alter the Octane /Mix of any given Fuel.

''An octane number is a measure of gasoline's ability to resist pre-ignition, also known as "knocking" or "pinging".
Octane is a rating, similar to a ratio of measurement, not a substance chemical or product you can add to gas. Determining octane measurements involves a complex methodology.''

Above extracted from a Paper on Fuel Sampling and Testing.

Oil vapours, if there was enough of it,
might alter Air Density, but on the
total Volume entering into a S54 which
if I remember correctly is something around
475 gpm, then the small volume being
re-cycled would be so slight as it would not make
any difference in the real world.

Regards,

The Gorilla.

On a personal note I don't really appreciate your tone.

If you want to teach someone to suck eggs mate, go do it to someone else!

I am well aware of what an octane rating is and yes it is just a number.

Your figure of 475gpm is at what RPM by the way? This figure changes with engine load, as does the amount of vapour that the engine breathes(blow-by).
And if this so called oil vapour/ particles/ oil is not entering our engines in great volumes then how does the plenum/ ICV/ Air rail/ trumpets get so dirty?? Because in the "real world" as you put it, it seems most people on here suffer from extremely dirty/oil coated/ carbon deposited trumpets, throttle butterflies, etc etc....

[cantfind1]

But it keeps your trumpets cleaner you numpty:hahaha:.

I agree it will make fuck all performance difference, but if it makes people think it helps the engine run better, then let them do it.

Its all relative to personal appiness, :beer:

Edited to add, I reckon if you add oil to fuel it might raise the "octane" slightly

And Lawsy if you don't think that removing oil vapour and carbon from your intake helps your engine run better and cleaner then why bother cleaning the trumpets at all??

[cantfind1]

Whatever, that's why all race engines feed their dirty breather air back into the intake.........! The only reason road cars have it is for emission requirements. You can also throw away your secondary air pump for that matter!

It does not change the octane rating of the fuel entering the engine, once a given cylinder is filled with Fuel/air/oil vapour mix this is where the knock characteristics of the mixture are changed by the oil vapour. Oil fumes induce knock so effectively reduces the octane of the mixture going into the engine.

Call it octane, call it whatever you like but the mixture is no longer pure air/fuel with the added oil vapour.

Oil vapours increase detonation, so your engine will run less timing. Hence less power! Its a known fact that oil degrades fuel quality when mixed.

Mr Gorilla you are not right all the time, in fact I don't suppose you have found the extra fuelling tables in the CSL map files for when sport mode is on have you?

Probably because there isn't one!

I don't see why you are arguing to be fair.

Oil catch cans are a proven technology for engines, why I am bothering to explain what is already known throughout the industry is beyond me!

[The Gorilla]

Hi,

Quote-''Gorilla was being a bit of a pedant, but we know he means well.

Lawsy- The above made the old Primate chuckle.

For sure they can buy their Thomas Fandangle parts to keep
their 'Trumpets' clean, but its when the laws of ''''Phisics''''
are re-written its gets a bit rich, or in this case lean.

Regards,

The Gorilla.

[Bounce]

But it keeps your trumpets cleaner you numpty:hahaha:.

:hahaha::hahaha:

[shane@mbtech]

Hi,

The 'volume' of Oil particles returned
to the Plenum which are then subsequently
''re-used'' would not make any difference to
the Octane of the Fuel entering the
engine whatsoever.

Oil Vapours do not have the ability to
alter the Octane /Mix of any given Fuel.

''An octane number is a measure of gasoline's ability to resist pre-ignition, also known as "knocking" or "pinging".
Octane is a rating, similar to a ratio of measurement, not a substance chemical or product you can add to gas. Determining octane measurements involves a complex methodology.''

Above extracted from a Paper on Fuel Sampling and Testing.

Oil vapours, if there was enough of it,
might alter Air Density, but on the
total Volume entering into a S54 which
if I remember correctly is something around
475 gpm, then the small volume being
re-cycled would be so slight as it would not make
any difference in the real world.

Regards,

The Gorilla.

But it keeps your trumpets cleaner you numpty:hahaha:.

I agree it will make fuck all performance difference, but if it makes people think it helps the engine run better, then let them do it.

Its all relative to personal appiness, :beer:

Edited to add, I reckon if you add oil to fuel it might raise the "octane" slightly

[shane@mbtech]

Gorilla was being a bit of a pedant, but we know he means well.

[The Gorilla]

Hi,

The 'volume' of Oil particles returned
to the Plenum which are then subsequently
''re-used'' would not make any difference to
the Octane of the Fuel entering the
engine whatsoever.

Oil Vapours do not have the ability to
alter the Octane /Mix of any given Fuel.

''An octane number is a measure of gasoline's ability to resist pre-ignition, also known as "knocking" or "pinging".
Octane is a rating, similar to a ratio of measurement, not a substance chemical or product you can add to gas. Determining octane measurements involves a complex methodology.''

Above extracted from a Paper on Fuel Sampling and Testing.

Oil vapours, if there was enough of it,
might alter Air Density, but on the
total Volume entering into a S54 which
if I remember correctly is something around
475 gpm, then the small volume being
re-cycled would be so slight as it would not make
any difference in the real world.

Regards,

The Gorilla.

[cantfind1]

Tell you what, turn your engine on leave it idling.

Remove the breather hose at the end that fits into the airbox, see how much dirty vapour is coming out at idle. If you like take a smell!

Its hot gas and full of hydrocarbons. Not what you really want going back into your intake.

As your RPM increases the volume of vapour increase...

[cantfind1]

The Vapour that comes out of the crankcase breather goes straight into the intake. This vapour then mixes with the fresh air coming in through the Airbox/Filter.

This air/mix is then taken into the throttle bodies and mixed with the fuel in the combustion chamber.

Hence this cylinder mixture now not only contains fuel and air(as it should), but oil vapour from the engine and possibly some oil.

Its this vapour and oil particles which decreases the octane rating of that cylinder at that particular instant.