CCV Mod Re-Visited
Thread Starter
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you can't fix stupid!
Joined: Mar 2008
Posts: 1,906
Likes: 2
CCV Mod Re-Visited
alright i would like to run my ccv mod to the exhaust.....it currently pokes out through the tansfer case skid plate.....i find it hard to believe that there really isnt a defined solution for routing to the exhaust....some people say too much pressure would go into crank case.....well isnt the stock configuration setup to have pressure against the ccv? the little tube is facing towards the front of the air intake so the incoming air would have to pressurize it a little wouldnt it? does anyone here run a ccv over to their exhaust and not have any problems? im thinking if i run my 3/4" hose over to the exhaust with a 3/4" pipe welded in the exhasut at a 45* angle with the end of the pipe that is on the inside of the exhaust cut at a 45* so as to point the escaping gasses towars the exit of the exhaust then there should be no way that the exhaust could pull a 180 and go back up the ccv right? just my theory.....as for check valves added to the above setup.....how do you get the right check valve and not one with too much spring presssure for the ccv to overcome? i would like some real ingenuity here to solve this......open to all suggestions and or ideas.........
Laughing Gas
Joined: Mar 2008
Posts: 967
Likes: 7
From: coquitlam,BC
I have thought about clamping or spot welding a tube at the end of the exhaust and running the ccv line to it so the ccv gas exits at the same spot. i think you will have an issue with exhaust pressure even at a 45deg angle.Roy
Thread Starter
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you can't fix stupid!
Joined: Mar 2008
Posts: 1,906
Likes: 2
ok here is a kit made for this exact function but in ricers....should work just fine with our trucks though.....
Moroso : Category Display
comes with the check valves and the tube/bung to be welded in......thoughts?
Moroso : Category Display
comes with the check valves and the tube/bung to be welded in......thoughts?
Laughing Gas
Joined: Aug 2012
Posts: 915
Likes: 3
From: Palatka, FL
The OEM CCV goes to the inlet of the turbo which is usually at a slight vacuum. If you removed all your cac pipes and intercooler then you would know that all of that stuff was completely coated in oil that came from the CCV. Route the CCV to atmosphere. DO NOT HOOK UP TO YOUR EXHAUST IN ANY WAY to the CCV. The CCV needs to be able to breathe. Your exhaust is at a pressure. You will melt the line that goes to your CCV and blow your rear main seal or front seal if you attempt this. Not a good idea in any way.
Dwayne
Dwayne
Thread Starter
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you can't fix stupid!
Joined: Mar 2008
Posts: 1,906
Likes: 2
The OEM CCV goes to the inlet of the turbo which is usually at a slight vacuum. If you removed all your cac pipes and intercooler then you would know that all of that stuff was completely coated in oil that came from the CCV. Route the CCV to atmosphere. DO NOT HOOK UP TO YOUR EXHAUST IN ANY WAY to the CCV. The CCV needs to be able to breathe. Your exhaust is at a pressure. You will melt the line that goes to your CCV and blow your rear main seal or front seal if you attempt this. Not a good idea in any way.
Dwayne
Dwayne
More Turbo
Joined: Jan 2006
Posts: 687
Likes: 15
From: Lake Charles, LA
I agree indy, if tubing were inserted into the center of the exhaust, and pointed "backwards", eg. downstream in the exhaust piping, the flowing exhaust gases going past the smaller opening of the ccv should create a venturi effect and pull the vapors out of the ccv with a slight suction/vacuum. Not much, but shouldnt over pressure. But i guess it depends on where you make this insertion into the exhaust, I would think the further back the better.
Postmaster
Joined: Jul 2006
Posts: 4,993
Likes: 2
From: Bend, OR
The further back you go the dirtier it gets....
Wait...
wrong forum...
I have thought about doing this myself for years, just never messed with it. It will not cause any harm if done right.
Wait...
wrong forum...
I have thought about doing this myself for years, just never messed with it. It will not cause any harm if done right.
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Lead Driver
Joined: Dec 2003
Posts: 5,250
Likes: 42
you can dredge through some 6-7 year old threads that go into great detail about the ccv mod. people did it years ago. Kris did it (45*- we discussed a lot) when he put that single giant stack on his truck. It seemed to work with no ill effect. some members made capture canisters, some piped into the exhaust, while a lot of us never bothered with it. there were some members that ran the ccv exhaust all the way back along side their exhaust pipe.
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Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
1fixitman mentioned it going to the turbo instead of open air. I'm arriving late to the CCV party, but I want to understand the issue. Just listening to this, I invision a few things:
- CCV to the turbo intake? This harkens back to feeding it to the air filter housing... outside the filter to the carb. A carbed car treated the intake better than the 7.3L does... they sent the fumes outside the filter. We're getting our turbo vanes coated with oil fumes? I'd like to keep my shiny new 38R clean and balanced after it's installed.
- 1fixitman makes a good point, there is a little exhaust pressure after the turbo, and hooking up to that is going the wrong way, plus it's really hot.
- KJNDIVER brings up an interesting point. The venturi effect being sought isn't a simple matter of putting a tube in there at the "correct" angle. The venturi effect is generated by a pressure differential - and there are two ways to do this: If you have two mediums (gasses) at equal pressure, one gas flowing at a high velocity can cause a slight venturi effect and pull the stationary gas (in close proximity) with it. Exhaust has pressure. You would need a pressure drop to create the venturi-effect vacuum. To be clear, you would need a device in the exhaust flow that introduces more backpressure after the turbo, just so we can create a pressure drop to "suck" the CCV gasses. I see a problem with this.
Lead Driver
Joined: Sep 2010
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Thread Starter
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you can't fix stupid!
Joined: Mar 2008
Posts: 1,906
Likes: 2
those are some good links timmy....im going to draw a picture of what im planning when i get home to see what you guys think but after all that reading it seems that its not really that much of a problem as long as you get the angles correct and tie it in to the exhaust back by the rear axle and maybe use some copper pipe to dissipate the heat so as not to melt the routing hose.....i was also reading about the 6.4 guys doing this without check valves and it working very nice but it was more of a 65* angle instead of 45*.....any how im going to start gathering the goodies together to make this happen......more to follow....
Postmaster
Joined: Dec 2010
Posts: 2,951
Likes: 4
From: Gary,Indiana
ok here is a kit made for this exact function but in ricers....should work just fine with our trucks though.....
Moroso : Category Display
comes with the check valves and the tube/bung to be welded in......thoughts?
Moroso : Category Display
comes with the check valves and the tube/bung to be welded in......thoughts?
Now for you guys that don't have alot of experience with 'Positive Crank Case Pressure" when you are running a turbo, supercharger or Hi compression engine it VERY important to create a negative CCP or you can and will blow oil out the seals, dip stick tubes and valve covers. And I know some of you have just vented the ccv to atmosphere with no ill effect. Well then you have just been lucky. I myself have ALOT of experiences with Crank Case Pressure in the past with hot rods, turbo gasser and supercharged boats. So I don't mean to sound like Joe here but I do know what I am talking about when it comes to CCP.
Now I went at it a different way since with a turbo diesel you really don't run high rpms going to the exhaust will work but doing it that way works best with High rpm engines. I made a home made catch can with drain and I have good results with it. I used a clear hose to the intake to see what is making it past the catch can and it is working well.