Catch Can For NA C7
Racer
Joined: Nov 2013
Posts: 313
Likes: 44
From: Little Rock AR
My dry sump system was dumping oil out of the ProCharger blow off valve after we supercharged it. I have a feeling after looking at the way things are done that all this oil was previously going into the intake. The BOV just gave us a low point for the oil to leak.
I would like to know if STOCK dry sump owners are seeing oil at the intake. The hose runs from the canister to the intake. Please take a look if you are so inclined and let us know if this is a design problem.
My opinion is that this is a design flaw.
-Jim
I would like to know if STOCK dry sump owners are seeing oil at the intake. The hose runs from the canister to the intake. Please take a look if you are so inclined and let us know if this is a design problem.
My opinion is that this is a design flaw.
-Jim
What concerns me as well is the strong smell of gasoline in the oil & yeah it's enough for the vapor to ignite. I'm all for bypassing this system altogether, for the cost of everything to date, I could have planted 2 dozen trees & more than offset the carbon footprint this system is trying to prevent. As it stands right now the runners need cleaning & so do the heads, any oil, liquid or vapor, that comes in contact with the metals close to the cylinders will stick & begin to harden, the operating temps of this new engine don't help matters either.
Build date:11/14/13
Vin:8693
Z51 NPP MRC
no mods; stock
3000 miles
Last edited by Wormwood; May 5, 2014 at 06:25 PM.
Heel & Toe
Joined: Feb 2014
Posts: 19
Likes: 0
From: Littleton Colorado
I'm bone stock z51 & just cleaned out the intake for the 2nd time. You have to be very mindful of your rpm's until you warm up & no longer hear the oil splashing around in the reservoir. Nevertheless, I'm still getting oil burped up into the intake in the picture is a plastic water bottle regular size (500ml) this what I've poured out twice now.
Build date:11/14/13
Vin:8693
Z51 NPP MRC
no mods; stock
Build date:11/14/13
Vin:8693
Z51 NPP MRC
no mods; stock
Heel & Toe
Joined: Feb 2014
Posts: 19
Likes: 0
From: Littleton Colorado
"I'm bone stock z51 & just cleaned out the intake for the 2nd time. You have to be very mindful of your rpm's until you warm up & no longer hear the oil splashing around in the reservoir. Nevertheless, I'm still getting oil burped up into the intake in the picture is a plastic water bottle regular size (500ml) this what I've poured out twice now. "
Build date:11/14/13
Vin:8693
Z51 NPP MRC
no mods; stock
Can you determine that this is sourced from the canister and NOT the PCV (right side) of the motor?
Build date:11/14/13
Vin:8693
Z51 NPP MRC
no mods; stock
Can you determine that this is sourced from the canister and NOT the PCV (right side) of the motor?
Advanced
Joined: May 2014
Posts: 97
Likes: 3
My dry sump system was dumping oil out of the ProCharger blow off valve after we supercharged it. I have a feeling after looking at the way things are done that all this oil was previously going into the intake. The BOV just gave us a low point for the oil to leak.
I would like to know if STOCK dry sump owners are seeing oil at the intake. The hose runs from the canister to the intake. Please take a look if you are so inclined and let us know if this is a design problem.
My opinion is that this is a design flaw.
-Jim
I would like to know if STOCK dry sump owners are seeing oil at the intake. The hose runs from the canister to the intake. Please take a look if you are so inclined and let us know if this is a design problem.
My opinion is that this is a design flaw.
-Jim
Racer
Joined: Nov 2013
Posts: 313
Likes: 44
From: Little Rock AR
"I'm bone stock z51 & just cleaned out the intake for the 2nd time. You have to be very mindful of your rpm's until you warm up & no longer hear the oil splashing around in the reservoir. Nevertheless, I'm still getting oil burped up into the intake in the picture is a plastic water bottle regular size (500ml) this what I've poured out twice now. "
Build date:11/14/13
Vin:8693
Z51 NPP MRC
no mods; stock
Can you determine that this is sourced from the canister and NOT the PCV (right side) of the motor?
Build date:11/14/13
Vin:8693
Z51 NPP MRC
no mods; stock
Can you determine that this is sourced from the canister and NOT the PCV (right side) of the motor?
Another member just posted about removing his CAI. The stock intake system & the cavities where the PCV ports are would act like siphons. The more air that moves passed the entrance of those cavities, the higher the vacuum it would create at the ports. Similar to blowing air across the mouth of a milk jug. I haven't seen a CAI system that has all these goofy labyrinth designed intake, so that said I'd think a aftermarket intake may just as we'll fix the issue, but may unknowingly create a higher than normal case pressure since there's no longer a constant vacuum applied to the engine case. I'd like to check that out myself, if I could find a sensor that would work for this application...
Wormwood
Drifting
Joined: Jun 2007
Posts: 1,425
Likes: 238
From: Macomb MI
Wormwood,
I've been looking at CAIs and catch cans. The new aFe has one of these suction pods with two fittings for the OEM PCV system. Looks like tapping an extra fitting into it for one of the dual outlet Elite cans would be pretty straightforward. I'm leaning this way...
http://forums.corvetteforum.com/c7-t...l-release.html
I've been looking at CAIs and catch cans. The new aFe has one of these suction pods with two fittings for the OEM PCV system. Looks like tapping an extra fitting into it for one of the dual outlet Elite cans would be pretty straightforward. I'm leaning this way...
http://forums.corvetteforum.com/c7-t...l-release.html
Racer
Joined: Nov 2013
Posts: 313
Likes: 44
From: Little Rock AR
Wormwood,
I've been looking at CAIs and catch cans. The new aFe has one of these suction pods with two fittings for the OEM PCV system. Looks like tapping an extra fitting into it for one of the dual outlet Elite cans would be pretty straightforward. I'm leaning this way...
http://forums.corvetteforum.com/c7-t...l-release.html
I've been looking at CAIs and catch cans. The new aFe has one of these suction pods with two fittings for the OEM PCV system. Looks like tapping an extra fitting into it for one of the dual outlet Elite cans would be pretty straightforward. I'm leaning this way...
http://forums.corvetteforum.com/c7-t...l-release.html
My suggestion was to mount the catch cans forward of the front wheel well, I'm still waiting to hear back from Elite on that. In any case, Elite is what I'm looking at as well, it just may be modified.
The Vette's going to the dealership this week for a new windshield & intake cleaning. so I'll have some extra time to see what Elite says...
This was what I had on hand last Friday night, it's a Moroso can breather, but what's nifty is it fit on the horn mount perfect!!
Wormwood
Advanced
Joined: May 2014
Posts: 97
Likes: 3
I'd say the canister, because when I'm cleaning everything out, I first hang the PCV lines on the overhead door rails & the long one always has some oil in the line & the short never has.
Another member just posted about removing his CAI. The stock intake system & the cavities where the PCV ports are would act like siphons. The more air that moves passed the entrance of those cavities, the higher the vacuum it would create at the ports. Similar to blowing air across the mouth of a milk jug. I haven't seen a CAI system that has all these goofy labyrinth designed intake, so that said I'd think a aftermarket intake may just as we'll fix the issue, but may unknowingly create a higher than normal case pressure since there's no longer a constant vacuum applied to the engine case. I'd like to check that out myself, if I could find a sensor that would work for this application...
Wormwood
Another member just posted about removing his CAI. The stock intake system & the cavities where the PCV ports are would act like siphons. The more air that moves passed the entrance of those cavities, the higher the vacuum it would create at the ports. Similar to blowing air across the mouth of a milk jug. I haven't seen a CAI system that has all these goofy labyrinth designed intake, so that said I'd think a aftermarket intake may just as we'll fix the issue, but may unknowingly create a higher than normal case pressure since there's no longer a constant vacuum applied to the engine case. I'd like to check that out myself, if I could find a sensor that would work for this application...
Wormwood
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Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
This is the intention of the design but under low vacuum, high intake flow the fresh air lines can indeed allow vented crankcase gasses to include oil and other poop into the intake. This was more prevalent in previous gen cars (LSx motors). I have yet to see this occur on the LTx; only dry sump cars burping oil into the intake, which is separate from the dirty PCV issue. Wet sump (non-Z51) cars seem to be ok. The part throttle/idle dirty U-Tube line remains to be seen whether it will introduce poop, but so far mine seems to be staying clean.
Advanced
Joined: May 2014
Posts: 97
Likes: 3
This is the intention of the design but under low vacuum, high intake flow the fresh air lines can indeed allow vented crankcase gasses to include oil and other poop into the intake. This was more prevalent in previous gen cars (LSx motors). I have yet to see this occur on the LTx; only dry sump cars burping oil into the intake, which is separate from the dirty PCV issue. Wet sump (non-Z51) cars seem to be ok. The part throttle/idle dirty U-Tube line remains to be seen whether it will introduce poop, but so far mine seems to be staying clean.
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
possibly. I guess it depends on the design of the intake. I would think having a separate section that nullifys the effect would help. the stock intake has it, the afe has it.....so far my stock intake has had no issue but that could also be due to the internal redesign of the LTx system.
Racer
Joined: Nov 2013
Posts: 313
Likes: 44
From: Little Rock AR
Wormwood,
I've been looking at CAIs and catch cans. The new aFe has one of these suction pods with two fittings for the OEM PCV system. Looks like tapping an extra fitting into it for one of the dual outlet Elite cans would be pretty straightforward. I'm leaning this way...
I've been looking at CAIs and catch cans. The new aFe has one of these suction pods with two fittings for the OEM PCV system. Looks like tapping an extra fitting into it for one of the dual outlet Elite cans would be pretty straightforward. I'm leaning this way...
Take a look at Elite's website, they've added instructions & purchase options for the Z51 with dry sump. They're adding more website content tomorrow that's specific to the Z51's...
Looks like they have got a solution to the problem.
Wormwood
Supporting Vendor
Joined: Aug 2003
Posts: 3,641
Likes: 7
From: Beautiful CO
St. jude Donor '14
http://www.eliteengineeringusa.com/c...el-years-2014/
Heel & Toe
Joined: Feb 2014
Posts: 19
Likes: 0
From: Littleton Colorado
I am tired of oil all over my garage floor. ProCharger has not seen this problem on any of the units that they have done, nor heard of this problem from any of their customers. I also do not think that the supercharger is the problem.
I have coughed up another 4~5 OZ. in the past two days... Does anyone know if there would be any problem with plugging the outlet from the dry sump supply as shown in the attached?
anyone, anyone? Bueller?
I have coughed up another 4~5 OZ. in the past two days... Does anyone know if there would be any problem with plugging the outlet from the dry sump supply as shown in the attached?
anyone, anyone? Bueller?
Last edited by sirjames_CO; May 8, 2014 at 01:04 PM.
Team Owner
Joined: Aug 2007
Posts: 136,140
Likes: 2,432
From: I live my life by 2 rules. 1) Never share everything you know. 2)
St. Jude Donor '11-'12-'13, '16-'17-'18
I am tired of oil all over my garage floor. ProCharger has not seen this problem on any of the units that they have done, nor heard of this problem from any of their customers. I also do not think that the supercharger is the problem.
I have coughed up another 4~5 OZ. in the past two days... Does anyone know if there would be any problem with plugging the outlet from the dry sump supply as shown in the attached? [IMG]C:\Users\jim\Desktop\Z51 Problems Mod.jpg[/IMG]
I have coughed up another 4~5 OZ. in the past two days... Does anyone know if there would be any problem with plugging the outlet from the dry sump supply as shown in the attached? [IMG]C:\Users\jim\Desktop\Z51 Problems Mod.jpg[/IMG]
Race Director
Joined: Jul 2007
Posts: 10,961
Likes: 2,643
From: Texas Hill Country
I am tired of oil all over my garage floor. ProCharger has not seen this problem on any of the units that they have done, nor heard of this problem from any of their customers. I also do not think that the supercharger is the problem.
I have coughed up another 4~5 OZ. in the past two days... Does anyone know if there would be any problem with plugging the outlet from the dry sump supply as shown in the attached?
anyone, anyone? Bueller?
I have coughed up another 4~5 OZ. in the past two days... Does anyone know if there would be any problem with plugging the outlet from the dry sump supply as shown in the attached?
anyone, anyone? Bueller?
I would not plug it but what might be a better solution for the dry sump cars is to simply relocate the burp line into a catch can with an open filter on top. let it burp out the excess and drain it.
sort of like a coolant reservoir but without the potential or need for it to go back into the radiator or cooling system. just for overflow.
it could be mounted right by the dry sump tank with a short line.
Supporting Vendor
Joined: Aug 2003
Posts: 3,641
Likes: 7
From: Beautiful CO
St. jude Donor '14
I am tired of oil all over my garage floor. ProCharger has not seen this problem on any of the units that they have done, nor heard of this problem from any of their customers. I also do not think that the supercharger is the problem.
I have coughed up another 4~5 OZ. in the past two days... Does anyone know if there would be any problem with plugging the outlet from the dry sump supply as shown in the attached?
anyone, anyone? Bueller?
I have coughed up another 4~5 OZ. in the past two days... Does anyone know if there would be any problem with plugging the outlet from the dry sump supply as shown in the attached?
anyone, anyone? Bueller?
Not a good idea. That is the source of the critical fresh make up air for the PCV system to do the "flushing" of the damaging combustion byproducts that constantly enter as part of the blow by. Doing so will not only defeat the critical evacuation process, but would also allow vapors in the sump tank to mix with the oil contaminating it and increased engine wear would also result much like any system that defeats the PCV system (a breatherd system will also result in much reduced engine life).
Team Owner
Joined: Mar 2005
Posts: 20,933
Likes: 905
From: salem OR
My dry sump system was dumping oil out of the ProCharger blow off valve after we supercharged it. I have a feeling after looking at the way things are done that all this oil was previously going into the intake. The BOV just gave us a low point for the oil to leak.
I would like to know if STOCK dry sump owners are seeing oil at the intake. The hose runs from the canister to the intake. Please take a look if you are so inclined and let us know if this is a design problem.
My opinion is that this is a design flaw.
-Jim
I would like to know if STOCK dry sump owners are seeing oil at the intake. The hose runs from the canister to the intake. Please take a look if you are so inclined and let us know if this is a design problem.
My opinion is that this is a design flaw.
-Jim
I thought it may have been my error. By failing to drain it completely
on an oil change.
Then after driving. I'm getting oil through the blow off valve.