scavenger tubes vs pcv valve

[dragnazz5.0]

well ive been talking with my boss and i was telling him that i need to get a pcv valve hooked up and he mentioned a scavenger system hooked up from each valve cover to the exhaust. ive seen this setup and its proven that it works but its mostly on race cars. is there any benefit to using this setup as opposed to a pcv valve?

edit: obviously there would have to be a little more engineering to it than just hooking up a line from the valve cover to the exhaust. i was thinking of using a check valve from the smog pump system on each side. i dont know....i think jegs has something similar to what im thinking of though

 

[bullitstang1313]

The only advantage that I can see is that you don't run the risk of ingesting oil due to a bad pcv valve / filter.

 

[dragnazz5.0]

yeah, thats what i was thinking

 

[millhouse]

To get that type of system to work, you'll need to ditch the mufflers...and dump the exhaust before the axle. You'll also need to install some baffles in each valve cover to prevent the exhaust from sucking oil straight from the covers.

IMHO, I'd just hook the stock pcv system back up.

 

[dragnazz5.0]

well its a carb'd motor and there isnt a pcv system right now...just a breather. ive got dumps and i dont see why the mufflers would have anything to do with it

 

[millhouse]

well its a carb'd motor and there isnt a pcv system right now...just a breather. ive got dumps and i dont see why the mufflers would have anything to do with it

Well..it's my understanding that the exhaust scavenging systems need as little backpressure as you can get. The exhaust reverberations from mufflers can distrupt the venturi effect required to draw out gasses. Thats not to say it won't work, but with a muffler placement of the vacuum line is that much more crucial.

 

[dragnazz5.0]

ahh...yeah i guess that makes a lot of sense now. i didnt really understand where you were coming from but i can see that now

 

[vristang]

I would worry about constantly smelling half burned oil with an exhaust system.

A stock type pcv setup should work very well, even if it takes a little work to get it right.

 

[dragnazz5.0]

yeah, im just really lazy right now and dont want to deal with it. ive got other problems with the setup that need to be fixed also. so im gonna have to take a sunday and fix them all