Ok so if we put a -10 from the passenger side valve cover and a -10 from the PCV port on the drivers side of the intake and run them to a catchcan, that should work since I am still pulling air from the crankcase

 

Untill you put your foot in it, and add boost to your crankcase and catch can.
Or is there some type of check valve in your system? PCV valves usually leak under boost.

I've been reading this thread since it started, and have tried almost every idea here.

Currently, I'm just using 2 beathers, they need cleaning about every 300 miles.

---Bill.

 

My pcv valve holds 15psi. I checked it under WOT.

 

That would be the same as running two lines from the valve covers to a catch can. There would be no ventilation due to no vacuum source. The vacuum comes from the front of the intake manifold.

 

How would I boost the crankcase when it is going to a vented catchcan external to the engine? If I am wrong correct me. I have seen several street driven LS1 cars run without the PCV valve, trying to understand why we can't do the same I guess. The less clutter in the engine bay the better

 

Ok, but why do we need a Vaccum source, wouldn't a FI motor be different than a N/A motor??
In my opinion the stock PCV setup was setup to handle somewhere around stock power, not 3 time the power a stock car makes

 

You won't have any vacuum at WOT but as soon as you let off the throttle it begins to clean all the blowby out of the crankcase. Without a vacuum source you constantly have harmful blowby gases in your crankcase. 700hp or 300hp it still works the same.

 

Makes since I suppose.

Ok lets see if this works then
-10 Braided line from each valvecover to a vented catchcan like before. But on the intake where the PCV valve is I weld a -10 bung on it and run braided to the front of the intake manifold with a 1-way checkvalve and possible a Small ( if I can find one) oil air seperator in between????

 

If the -10 line in the first quote is connected to the intake, as stated, it will see both vacuum and boost. If the catch can is now vented, as stated in the second quote, neither vacuum or boost will get to the crank case. it will just vent, you would have a BIG vacuum and boost leak.

Best case would be to have a vacuum on the crankcase of either FI or N/A motors at all times, to rid the crankcase of unwanted blowby (that contains hydocarbons/other contaminates). Also more HP when there is less windage on the crank/rods, this is why race cars use vacuum pumps or evac systems. But neither work well on the street.

Of all the system ideas in this thread, I like your first one (back on page one). As long as the oil seperator did not let any oil at all back into the intake. With that design the intake side of the blower/turbo would always pull a vacuum on the crankcase, and would increase with RPM (as needed), like a vacuum pump.

This is all, JMHO ---Bill.

 

A Pretty Wise man told me do that, maybe I just set it up like that and call it a day, lol.

The PCV system connects on the intake like this http://shbox.com/1/pcv.jpg and goes to the front of the intake (right below the TB) I figured I would just cap it off below the TB and run the line from the side of the intake to the Blower suckside with a oil air seperator?
Think that would be sufficient.

BTW This whole PCV Evac system is going to make me Crazy, lol.

 

I've done mine that way before. You will get oil all over the inside of your supercharger and your intercooler even with a separater inline. It probably won't hurt anything though. I hope I'm not sounding like a know it all. I've experimented with all the different ways trying to find the best one since one of my main goals was longevity. So this is interesting to me.

 

What oil/air seperator were you using?? Maybe it could not keep up??

Just got a idea, what if the air/oil seperator I used was one that was vented with a filter??? Would that hurt the suction of the supercharger???
Also what 1way check valves is everyone using???
Mcmaster has about a million, lol.

 

Why not just run an EVAC kit to the exaust?

Thats how I run mine...comes with the check valves and provides pretty good suction....

 

If you are concerned w/ the blower sucking oil, why not use the seperator between the pcv instead of capping the end under the tb?

I'm using the oil/seperator and not running it to the blower as I didn't want the oil on there. See the 1st page of this thread to see what oil seperator I'm using. The VC I'm just using breathers (3) but decided to switch and run -10 off of each VC to a vented catch can. I can deal w/ the oil smell but not oil over the engine bay.

 

So for this seams to be the best bet since it'll suck from the valve covers out the exhaust and any oil vapors going to the exhaust will either be fried or blown out of the exhaust.

Maybe an inline filter between the PCV and the port underneath the TB.

-B