This is a good read for a lot of people

[Ricko1966]

@Grit dog @CWBlack71 I was trying to find cw an illustration of how his crankcase should be vented. Stumbled across this. It might be useful to both of you and some others on this forum

Crankcase Ventilation–Yes, it’s Important

Positive Crankcase Ventilation (PCV) can easily qualify as the least interesting aspect of a gearhead’s inventory of hot rod romance parts. Many people think that this system’s only benefit is to keep oil vapors from escaping valve cover vents that create that annoying oil mist that coats your...

digital.allchevyperformance.com

 

[Tank6x2]

Thanks!

 

[Ricko1966]

I don't know if I necessarily by in with their 2stage adjustable valve yet,but thought it was a good read so people cold see how pcv should work,pitfalls of improper installations work arounds for oil consumption etc.

 

[Camar068]

Good read. When I was prepping to do the ls swap years ago, I noticed the intake was filthy. So I added a catch can, but I'm sure some still gets in there.

So I've wondered if a small electrical vacuum pump would help. This would draw a vacuum on the crankcase, go through the catch can, then to atmosphere. Maybe even go as far as increasing vacuum as rpm's go up.

Just something thats been in the back of my mind for a few years.

[edit] more thought. Having 2 sources of vacuum may not work well. lol, guess I'll keep wondering.

 

[fast 99]

Good read. When I was prepping to do the ls swap years ago, I noticed the intake was filthy. So I added a catch can, but I'm sure some still gets in there.

So I've wondered if a small electrical vacuum pump would help. This would draw a vacuum on the crankcase, go through the catch can, then to atmosphere. Maybe even go as far as increasing vacuum as rpm's go up.

Just something thats been in the back of my mind for a few years.

[edit] more thought. Having 2 sources of vacuum may not work well. lol, guess I'll keep wondering.

Drag racers use a system they call vac-u -pan. A cheap version uses an air pump check valve and pipe welded to the collector. Uses the venturi effect. A hose is attached to the valve covers. It is supposed to help with ring flutter at high RPM.

Engine masters tried a real vacuum system on the dyno. Don't remember exactly but I don't think there was much HP improvement.

Doubtful a vacuum pan system would result in any benefit on street driven vehicle except decrease oil leaks.