Who eliminated the STS PCV system and used a catch can?
06-27-2008, 10:00 PM
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Who eliminated the STS PCV system and used a catch can? ive heard alot about the sts pcv getting stuck and not working properly so before i put the whole kit on i want to eliminate the sts system and use a catch can how does that work and what do i need and if you got pics please post if possible thanks
06-27-2008, 10:21 PM
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Sure someone else has pics for ya.
06-28-2008, 08:52 AM
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When I did mine I put it inline where the pcv valve runs....first I eliminated the pcv valve and replaced it with a check valve. It keeps the oil/mist out of your intake. Revextreme (sponsor here) sells a very nice catch can. I think Norris MS does as well.
06-28-2008, 08:59 AM
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well from what i know it eliminates the whole electronic sts stuff and you use a mechanical system not electronic like sts with the inline pressure switch and check valve, all that stuff overtime i guess goes bad and doesnt work properly and the catch can always works and it seems to work alot better the the sts kit pcv system
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06-28-2008, 12:42 PM
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First of all, I converted to an LS6 valley cover and pcv, before I went turbo.
The setup with the turbo, is the front connection (from the valley cover) still has a pcv valve, and a small inline water/oil separator.
The back connection is capped with a breather. That way there's no direct line from the intake tract to the crankcase, but air can still enter when the pcv is pulling vacuum at idle.
The setup with the turbo, is the front connection (from the valley cover) still has a pcv valve, and a small inline water/oil separator.
The back connection is capped with a breather. That way there's no direct line from the intake tract to the crankcase, but air can still enter when the pcv is pulling vacuum at idle.
06-29-2008, 12:26 AM
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Stock PCV line routing from driver/passanger side to an AMW catchcan, then a small breather, and finally into the stock PCV valve. Worked like a champ. If you use a VENTED catchcan (which the AMW is not), then there is no need fo a breather. W/ a non-vented can and no beather you'll end out filling the catchcan w/ oil over time.
I elminiated the STS PCV shutoff valve and had no issues. The key is having the beather though. Using BOTH also isn't a bad idea as the breather will vent vapor and you'll have to wipe it off after driving (it'll have a small amount of oil residue on it).
I capped of the 2x small vacuum pots on the actual valve covers.
Anyhow, here's the pic:
To answer your other Q.....I decided to go back NA fo a couple reasons. Felt I had taken the STS to the limit for truly "streetable" drivabilityon the stock bottom end. I had it running very smooth, but it always required monitoring and adjusting to keep things good. I believe ANY FI system requires this. Anyhow, the wife and kids were tired of me always "pre-flighting" the car and maintaining it for the little amount of time it was driven. So, keeping the masses happy and going to a simple tune once and forget system.
Still trying a few things to get max power from the stock shotblock though.
06-29-2008, 03:19 PM
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So you had your pcv running from the side of the intake to catch can to breather then to the port by TB where the stock pcv goes? I take it you just have the other two ports on the passenger side valve cover capped off?
06-29-2008, 09:43 PM
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OK, found an old pic that shows everything. Here's how mine was:
Stock PCV line routing from driver/passanger side to an AMW catchcan, then a small breather, and finally into the stock PCV valve. Worked like a champ. If you use a VENTED catchcan (which the AMW is not), then there is no need fo a breather. W/ a non-vented can and no beather you'll end out filling the catchcan w/ oil over time.
I elminiated the STS PCV shutoff valve and had no issues. The key is having the beather though. Using BOTH also isn't a bad idea as the breather will vent vapor and you'll have to wipe it off after driving (it'll have a small amount of oil residue on it).
I capped of the 2x small vacuum pots on the actual valve covers.
Anyhow, here's the pic:
To answer your other Q.....I decided to go back NA fo a couple reasons. Felt I had taken the STS to the limit for truly "streetable" drivabilityon the stock bottom end. I had it running very smooth, but it always required monitoring and adjusting to keep things good. I believe ANY FI system requires this. Anyhow, the wife and kids were tired of me always "pre-flighting" the car and maintaining it for the little amount of time it was driven. So, keeping the masses happy and going to a simple tune once and forget system.
Still trying a few things to get max power from the stock shotblock though.
Stock PCV line routing from driver/passanger side to an AMW catchcan, then a small breather, and finally into the stock PCV valve. Worked like a champ. If you use a VENTED catchcan (which the AMW is not), then there is no need fo a breather. W/ a non-vented can and no beather you'll end out filling the catchcan w/ oil over time.
I elminiated the STS PCV shutoff valve and had no issues. The key is having the beather though. Using BOTH also isn't a bad idea as the breather will vent vapor and you'll have to wipe it off after driving (it'll have a small amount of oil residue on it).
I capped of the 2x small vacuum pots on the actual valve covers.
Anyhow, here's the pic:
To answer your other Q.....I decided to go back NA fo a couple reasons. Felt I had taken the STS to the limit for truly "streetable" drivabilityon the stock bottom end. I had it running very smooth, but it always required monitoring and adjusting to keep things good. I believe ANY FI system requires this. Anyhow, the wife and kids were tired of me always "pre-flighting" the car and maintaining it for the little amount of time it was driven. So, keeping the masses happy and going to a simple tune once and forget system.
Still trying a few things to get max power from the stock shotblock though.
But I lover her for it because I just had a little one 
But the wife likes trail blazers alot sooo........ I may have two toys soon because she dosent know anything about the trailblazer SS!