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Oil Catch Can?

micko32

By micko32,
in Engines & Forced Induction

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WazR32GTSt Grand Master

WazR32GTSt

Posted
Posted

in a healthy engine hardly any oil should go into the intake

if its a stock unmodoified car then don't worry about it

if its a modded car with FMIC runnign 14psi then might be worth it just to keep an eye on blowby..

money can be better spent elsewhere for your situation

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WazR32GTSt Grand Master

WazR32GTSt

Posted
Posted

exactly..

as with most things to do with cars, most people don't know what they are doing or talking about

i'm the first to admit if i don't know what's going on but in this case i know that a catch can does pretty much SFA on a stock engine. hell even on mine which is mildly modified i have not had any oil ever in my catch can

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limpus Mentor

limpus

Posted
Posted (edited)

Even on a stock engine it can be beneficial in some way to stop blowby from being injested...a stock engine thats tired can still have blowby...oil mist into the engine makes it more prone to detonation and we all know that thats not good...so yes...it does pay to be safe...that said...they are not absolutely necessary...

Edited by limpus
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tridentt150v Grand Master

tridentt150v

Posted
Posted
exactly..

as with most things to do with cars, most people don't know what they are doing or talking about

i'm the first to admit if i don't know what's going on but in this case i know that a catch can does pretty much SFA on a stock engine. hell even on mine which is mildly modified i have not had any oil ever in my catch can

So you've got one??? But your telling ppl to "do as I say not as I do!!!"....................lol

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ToF Experienced

ToF

Posted
Posted
Even on a stock engine it can be beneficial in some way to stop blowby from being injested...a stock engine thats tired can still have blowby...oil mist into the engine makes it more prone to detonation and we all know that thats not good...so yes...it does pay to be safe...that said...they are not absolutely necessary...

Finally someone that knows what he's talking about. Also if you set it up right, ie use a baffle, it is quite beneficial.

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WazR32GTSt Grand Master

WazR32GTSt

Posted
Posted
So you've got one??? But your telling ppl to "do as I say not as I do!!!"....................lol

my engine is not stock and i'm running 14psi through a motor with 150,000kms on it

plus it has engine-bling factor which i also desired

if you re-read the first post, you will realise that this guy is under the impression that a catch can is a necessary modification for his car based on what his mate told him.. this is not the case which i have been trying to point out

of course if your motor is stuffed it doesn't matter what mods you have it will still be useful but not necessary - a rebuild will be necessary in that case

anyone disagree? havign a good discussion is great...

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paulr33 Grand Master

paulr33

Posted
Posted

a catch can, does exactly as the name implies. it catches oil in the intake. if you have oil in the intake, something is wrong and you should focus your efforts and $$ on fixing that. using a catch can simply masks the problem and gives you the "oh its ok to have blowby, the catch can fixes that" type of attitude.

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AndrewD Contributor

AndrewD

Posted
Posted

Theres so much bad advice on forums like these (not saying this is a bad forum for that) but most people offer advice on products they know nothing about or have heard whats been going on around the rumour mill.

To pass emissions most of the blowby is recirculated into the intake. Its that simple. This is not good for combustion efficiency nor and can lead to preignition.

However a catch can, which allows the the oil air vapour to separate, stores the oil and vents the air to atmosphere. On a wet sump system this is often routed from the top of the cam cover, while on a dry sump system it also comes from the scavenge lines / deaerator.

They arent neccessary no. But an engine with high blowby may bog down, ping and get poor economy. So in that case they would be advisable.

Hope this helps ya.

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Sinful Grand Master

Sinful

Posted
Posted
Theres so much bad advice on forums like these (not saying this is a bad forum for that) but most people offer advice on products they know nothing about or have heard whats been going on around the rumour mill.

To pass emissions most of the blowby is recirculated into the intake. Its that simple. This is not good for combustion efficiency nor and can lead to preignition.

However a catch can, which allows the the oil air vapour to separate, stores the oil and vents the air to atmosphere. On a wet sump system this is often routed from the top of the cam cover, while on a dry sump system it also comes from the scavenge lines / deaerator.

They arent neccessary no. But an engine with high blowby may bog down, ping and get poor economy. So in that case they would be advisable.

Hope this helps ya.

This is what I have found out and been told and did have one for awhile and found it to be good and I was happy with it and I did not have any trouble with the police about it either.

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GreddyGo Rising Star

GreddyGo

Posted
Posted

Just a quick question,

What do you guys use to baffle your catch cans??

Steel wool or something similar??

And I didn't think it was illegal if it's connected up properly, if you have one with the airfiler attatched instead of going to the intake it would be illegal???

Cheers

Josh

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AndrewD Contributor

AndrewD

Posted
Posted
Just a quick question,

What do you guys use to baffle your catch cans??

Steel wool or something similar??

And I didn't think it was illegal if it's connected up properly, if you have one with the airfiler attatched instead of going to the intake it would be illegal???

Cheers

Josh

Depends really, steel wool could be used, or sheet metal baffles.

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