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1)I have LS6 valve covers, drivers side has pcv with grommet, and the passenger side has 1 nipple.
2) I have the stock ls1 valley
3) throttle body does not have a PCV nipple
4) I have a sealed catch can
I'm trying to figure out how to keep this can in my system and not spend a **** load of money on a Mighty Mouse can lol. It's my understanding that I will need a check valve somewhere in here but I really am clueless as how everything should be routed.
I didn't think the LS6 valve covers had a PCV valve in the hose since the LS6 valley cover had built in PCV but here's how I'd handle it if I wanted to keep PCV.
One hose coming off the driver side valve cover through the sealed can and from the can to an inline PCV valve just before the passenger side vacuum port on the intake manifold then a 3/8 inch line coming from the passenger valve cover into the bellow/air duct between the MAF and the throttle body.
On an LS1 there's the line from the driver side valve cover to a Y where it connects to the rear port on the passenger side valve cover. Notice the inline PCV valve at the end of the larger hose that connects to the small piece of rubber hose on the intake manifold? If running a sealed can on this type of setup I'd remove the PCV valve from the hose and connect that end to the sealed can and then out of the can through the inline PCV valve before entering the intake. Since the LS1 throttle body has a port then the front port of the passenger valve cover to the port on the TB.
I bought his setup when I put twins on my Firebird. Everything was very high quality and what impressed me even more was the customer service. For some reason, I can't remember why now, for the life of me, even looking at the instructions and countless google threads, I could not figure out how to hook it up. I emailed him on Thanksgiving night, not expecting a reply till the next week and I got a reply with in 10 minutes. He was very helpful and explained it in a way even I could understand.
I didn't think the LS6 valve covers had a PCV valve in the hose since the LS6 valley cover had built in PCV but here's how I'd handle it if I wanted to keep PCV.
One hose coming off the driver side valve cover through the sealed can and from the can to an inline PCV valve just before the passenger side vacuum port on the intake manifold then a 3/8 inch line coming from the passenger valve cover into the bellow/air duct between the MAF and the throttle body.
The only issue with this is it won’t vent under boost.
That is what the line going to the inlet of the turbo or S/C will do.
If you do a PCV style MM can, you just need to make sure the vent is side is sufficient to move the air required.
My last turbo car used a MM PCV can, on the vacuum side I used 3/8" line w/ a check valve and a remote mounted filter using 3/8" line off one of the valve covers to provide clean air for the PCV system.
For the vent side I used a single -12AN line off one valve cover to the can, this arrangement worked very well up to 14-15lbs. and 700whp, it probably would have been good for more but that was as high as I was willing to push that SBE LS1/pump gas combo.
With that said, my current car uses an open to atmosphere catch can setup with -10AN lines off each valve cover which is also working very well.
Neither setup has any oily smell or gets oil mist anywhere.
On my TT setup, the fresh air comes off the rear driver side V/C to the inlet side of the turbo(so it always see's vacuum)There is a fixed orifice in the valve cover that looks like a PCV but isn't.
The "inlet" on the catch can goes to the oil filler neck on the passenger V/C
The "exit" goes to the intake manifold behind the T/B
I capped off the LS6 valley cover and the passenger side V/C.
I have a NW T/B and has a plug where the nipple would be.
IIRC, this is a breather setup and not a closed PCV system.
The MM catch can has a check valve in the port that goes to the intake manifold so it doesn't boost the crankcase.
Last edited by LilJayV10; Dec 19, 2022 at 09:05 PM.
The only issue with this is it won’t vent under boost.
That is what the line going to the inlet of the turbo or S/C will do.
Help me understand how using a Procharger that forces air into the throttle body ventilates the crankcase when a factory PCV setup uses the intake manifold and the ports on the valve covers to do this? I haven't seen a Procharger kits installtion instructions but perhaps maybe you have. If it were me I'd be ditching PCV and venting to atmosphere but carry on.
Help me understand how using a Procharger that forces air into the throttle body ventilates the crankcase when a factory PCV setup uses the intake manifold and the ports on the valve covers to do this? I haven't seen a Procharger kits installtion instructions but perhaps maybe you have. If it were me I'd be ditching PCV and venting to atmosphere but carry on.
It really is a wash, PCV fans like to claim cleaner oil and engine internally but really in most cases these cars aren't used hard or with a lot of miles so it really isn't ann issue.
I change the oil in mine every summer and sometimes twice if I'm beating on it but even then, we're talking less than 1,000 miles in total.
Frequent oil changes can have the same effect and when you use something like Delo 15-40 it doesn't break the bank either.
Procharger install instructions for ls1 - the hose from the pass. valve cover to the throttle body reroutes to to the air filter, the rest of the pcv system stays the same
Procharger install instructions for ls1 - the hose from the pass. valve cover to the throttle body reroutes to to the air filter, the rest of the pcv system stays the same
Not saying you're wrong but I'm a little skeptical on this, which procharger kit is this from?
A smaller stock P or D series blower on lower boost I'm sure it's fine but for a larger blower making more power I'd upgrade the entire breather system.
My thoughts are that the majority of the crankcase ventilation is still being sucked in by the intake manifold. That little 3/8 inch line going into the throttle body from the front of the passenger valve cover has nowhere near the air suction that the intake manifold pulls on the other two ports on the valve covers. In my case if I were to make the switch to a Procharger I'd probably still ventilate the crankcase to atmosphere..
1)I have LS6 valve covers, drivers side has pcv with grommet, and the passenger side has 1 nipple.
2) I have the stock ls1 valley
3) throttle body does not have a PCV nipple
4) I have a sealed catch can
I'm trying to figure out how to keep this can in my system and not spend a **** load of money on a Mighty Mouse can lol. It's my understanding that I will need a check valve somewhere in here but I really am clueless as how everything should be routed.
Originally Posted by LilJayV10
I have a LS1 with a LS6 valley cover.
On my TT setup, the fresh air comes off the rear driver side V/C to the inlet side of the turbo(so it always see's vacuum)There is a fixed orifice in the valve cover that looks like a PCV but isn't.
The "inlet" on the catch can goes to the oil filler neck on the passenger V/C
The "exit" goes to the intake manifold behind the T/B
I capped off the LS6 valley cover and the passenger side V/C.
I have a NW T/B and has a plug where the nipple would be.
IIRC, this is a breather setup and not a closed PCV system.
The MM catch can has a check valve in the port that goes to the intake manifold so it doesn't boost the crankcase.
I think that should cover most of your questions. IIRC, you shouldn't run a closed system in this type of application, but this far from my area of expertise.
Help me understand how using a Procharger that forces air into the throttle body ventilates the crankcase when a factory PCV setup uses the intake manifold and the ports on the valve covers to do this? I haven't seen a Procharger kits installtion instructions but perhaps maybe you have. If it were me I'd be ditching PCV and venting to atmosphere but carry on.
The line goes to the inlet of the S/C or turbo, not after, so it’s sucking air creating a vacuum under boost.
Out of boost that same line servers as a fresh air inlet, and the check/PCV valve opens and operates as a typical system.
Im personally not a fan of venting to atmosphere on a street car, my experience is they are hard on seals, leaks form, nasty the oil and stink if you use AC or heat etc.
Im sure you will get other opinions on the subject
Procharger install instructions for ls1 - the hose from the pass. valve cover to the throttle body reroutes to to the air filter, the rest of the pcv system stays the same
This is what will add the ability to vent under boost.
Thanks everyone for the comments, I really appreciate all the constructive discussion regarding what I asked.
Perhaps they are not "ls6" valve covers. but since I went to 799 heads I had to get different valve covers than the ls1 covers. My drivers side cover has a grommet near the rear and the pcv valve goes in that.
After lots of discussion with others, I have purchased a dual can vented setup with an oil fill adapter. Here are some photos of a setup that mine will be mirroring.
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Procharger PCV setup 
