historically I'm a nitrous guy. In the past, my pcv system usually consisted of a LS6 valley cover to a vacuum source, and a breather on each valve cover (or both valve covers connected with a breather on a T) I'm setting up my first FI motor, and I'm buttoning things up. the blower does not allow for LS6 valley cover. To add to the mess, I'm running the holley LS valve covers that apparently have oil consumption issues on blown motors.

the previous owner set up the catch can setup more as a crank case vent than a typical PCV system. the catch can has a filter on top, and each valve cover runs to the catch can. there is no vacuum source, and no PCV valves anywhere.

is this method acceptable, or should I figure out a way to add vacuum to the system? If it is fine as is (no vacuum) do I need to worry about adding PCV valves from each cover to the can?

 

This is how it was setup on my Whipple.

1. Driver side to back of blower.
2. Passenger side pre-blower.

This will create a vacuum for the engine.

There are a few diagrams, mostly on ls1tech that details this more.

 

I had a catch can setup like the PO did for you, under boost I would smell oil in the cab. Going back to a PCV setup with the LSA setup.

 

The previous owner has set up a "draft can," which is a bit more old school and has the noted oil vapors emitted. It is the simplest and most sure way to avoid issues under boost, however. It's generally not emissions compliant, but for a weekend cruiser should probably be ok.

 

it's a 69 Camaro weekend warrior so emissions are not a worry.

I'm guessing there is no need to worry about a PCV valve in line to each valve cover since there is no vacuum being pulled on the system.

 

In that case, I'd leave it as-is unless the fumes are unbearable.

 

I've been running a -10 off each valve cover to a vented can for quite some time. I have noticed no adverse effects from not haveing a vacuum source and the intercooler stays much cleaner. I do get the smell inside the cab though.

 

I wonder if it would help running some hose down to the frame and putting the filter down there. i dont mind smelling manly ****

 

Had that thought on my way into work, whilst smelling some oil lol. I would do it, why not? Make sure its easy to drain and you'll have no problems I'd think, except in rain.