Blow-By/PCV valves?
 

I get a little blow by with my motor. I am concerned what negitive effect it would have to route the breather tubes thru a PCV setup? I have always been curious what negitive effects (performance aside) this might have on a N/A motor?

BH

Re: Blow-By/PCV valves?
 

If your blow by is normal, it should have no real negitive effect on power. We've been dynoing two 496 motors for over a month, both only have a PCV breather system and when we disconnected them on a few test we saw no appreciable change in power. Sometimes your oil consumption will go up slightly since some oil laden vapor is pulled thru and burned by the motor. The positive benefits are generally less oil leaks at other points on the motor due to a negative crankcase pressure and less oil fumes throughout the boat. To some this is important, but its your call.
Raylar

Re: Blow-By/PCV valves?
 

After several hours of running at speed I get a slight film inside the flame arrestor. Not having baffles inside the valve covers dosen't help either...

BH

Re: Blow-By/PCV valves?
 

IMHO if you have an enclosed engine compartment then you really should use a PCV valve set up. I run one on a blower motor. Less fumes and also helps pull any moisture vapor from under the valve covers. Not racing so I am not worried about a couple HP less.

Re: Blow-By/PCV valves?
 

I am going to hook up PCV valves to my valve cover and see if I get any loss of speed. Is there any chance of contaminating the intake charge when using the PCV valves?

BH