How much oil do you catch on a track day?

[BlitZ]

do you even know what 'blow-by' is?

http://www.bobistheoilguy.com/blowby.html

why do you think you have it? what "symptoms"?

Oil caught in catch can... what is your version of blow by?

my understanding..
I lose compression through rings on combustion... which creates pressure in crank case (blow by).. the pressure mixes with misty oil vapours.

this pressure is sucked up through pcv and catch can by intake manifold. Catch can separates the oil from air so it wont contaminate any further...

[fatboyz39]

Oil caught in catch can... what is your version of blow by?

my understanding..
I lose compression through rings on combustion... which creates pressure in crank case (blow by).. the pressure mixes with misty oil vapours.

this pressure is sucked up through pcv and catch can by intake manifold. Catch can separates the oil from air so it wont contaminate any further...

thats my understadning of it too

[tinkerbell]

do you even know what 'blow-by' is?

why do you think you have it? what "symptoms"?

ok, you answered the first part of my question, now answer the next two...


(hint - oil caught in the catch tank is not necessarily "blow-by" is it?)

[BlitZ]

Tink, I know what you are trying to get at ..

There is no real relationship b/w the blow by and oil..

However..
imagine an engine with minimal blow by and no windage. The vacume would not pull as much and hench less oil would be pulled out.


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It isn't. But blow by determines the amount of air being pulled out. The amount of air being pulled out should be directly proportional to the oil.

(hint - oil caught in the catch tank is not necessarily "blow-by" is it?)

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Example

You have 0 psi in the sump (no blow by, no nothing) --- > 0 air would be extracted and the vacume would not be utlised..

You have 5 psi in the sump (blow by) ---> vaume would suck it out

You have 100000000 psi in the sump (bad bad blow by) ---> Vacume would suck even more…


The more it sucks the more oil would be lost..


Just me 2 cents of understanding

[tinkerbell]

yes, maybe, but why do you think you have a blow-by problem?

or have i misunderstood that you don't actually think you have a problem?