• Welcome to the new SAOCA website. Already a member? Simply click Log In/Sign Up up and to the right and use your same username and password from the old site. If you've forgotten your password, please send an email to membership@sunbeamalpine.org for assistance.

    If you're new here, click Log In/Sign Up and enter your information. We'll approve your account as quickly as possible, typically in about 24 hours. If it takes longer, you were probably caught in our spam/scam filter.

    Enjoy.

Breather filters...

W

whoizrob

Donation Time
I am looking at simplifying my engine bay a bit and was looking at my crank case vent and valve cover vent (on the side of the oil fill spout). The crank case vent is simply free venting to the atmosphere care of the DPO and is making a HUGE mess. The valve cover vent is routed to a port on my intake manifold. My question is this. I wondered if I could reorient the valve cover breather vent (unbolt it and rotate it to face the same side as the crank case vent) run some hose and T them together into a breather filter. Is there any reason not to do this? Also, is it important to route the lines to a tank or will simply a filter suffice? This is a street driven, low RPM, automatic car BTW. Thanks!

Rob
 
Dodgealpine

Dodgealpine

Donation Time
Hi, The Green way would be to run to a catch tank, but I just used 2 freeflow filters on them, never made a mess since fitting them.
 
R

RootesRacer

Donation Time
Even with a catch can, you really want to get a positive flowing vent.

PCV gives flow to evac the crankcase, but PCV on a race car is bad because the oil vapors reduce the knock resistance of the fuel and PCV doesnt work well at wide open throttle any how since the intake is near atmospheric pressure and doesnt provide a pressure gradient for the PCV valve to flow.

The better thing to do is to install a catch can and run the suction side (which would normally go to the intake+PCV valve) and have it suctioned by an exhaust venturi setup.

This type setup provides positive flow at least under load and evacs the crankcase vapors into the exhaust where it doesnt get burned in the combustion chambers.
 
T

tom o

Donation Time
No matter how it is done, the air should go into the valve cover and out the side cover. The side cover has baffles in it to stop oil from being sucked out.
The valve cover has no baffles, so any oil that is there would be sucked out.
 
You must log in or register to reply here.
Top