Catch can ?
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
And for those who are considering buying a $20 filter that has a clear polycarbonate body - don't do it! As I mentioned, those units are rated to 125 degrees F MAX and are often not suitable for contact with fuel and even some synthetic oils. Any resulting vacuum leaks will allow unfiltered air to be pulled into the intake.
Drifting
Joined: Sep 2008
Posts: 1,410
Likes: 2
From: Chicago IL
Yes, although how much it catches will also depend upon how much blowby your particular engine produces. Even C6s with their internal oil/air separators allow oil from blowby to be ingested by the engine. One of the things I don't like about catch cans is the width of their "cans". The wider the can, the more likely that oil aerosols will be pulled out during low rpm, high turbulence driving. Having many ounces of oil sloshing around under high vacuum cannot be good, IMO.
And for those who are considering buying a $20 filter that has a clear polycarbonate body - don't do it! As I mentioned, those units are rated to 125 degrees F MAX and are often not suitable for contact with fuel and even some synthetic oils. Any resulting vacuum leaks will allow unfiltered air to be pulled into the intake.
And for those who are considering buying a $20 filter that has a clear polycarbonate body - don't do it! As I mentioned, those units are rated to 125 degrees F MAX and are often not suitable for contact with fuel and even some synthetic oils. Any resulting vacuum leaks will allow unfiltered air to be pulled into the intake.
Race Director
Joined: Dec 2000
Posts: 19,304
Likes: 85
From: San Diego CA
I'm using a glass-body version right now but the disadvantage of glass is that it is more of an insulator than a conductor. Fortunately, my setup has two things going for it:
1. The top part is aluminum, which is a good conductor.
2. The unit is located in a cool area of the engine bay (up front), so that the hot blowby gasses "see" a fairly significant temperature differential when they slam against the aluminum and somewhat cool glass body, which encourage airborn oil to coalesce on the cooler surfaces.
Some catch cans contain a "sight tube", but over time, this tube will become dark and harder to see through. Periodic cleaning is required if the oil level is expected to be easily observed at all times.
1. The top part is aluminum, which is a good conductor.
2. The unit is located in a cool area of the engine bay (up front), so that the hot blowby gasses "see" a fairly significant temperature differential when they slam against the aluminum and somewhat cool glass body, which encourage airborn oil to coalesce on the cooler surfaces.
Some catch cans contain a "sight tube", but over time, this tube will become dark and harder to see through. Periodic cleaning is required if the oil level is expected to be easily observed at all times.
