CCV Question
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CCV Question
Alright.. I'm not a big fan of running the hose all the way back to the bumper. So, here's my question, the previous owner had a bung welded into the down pipe of the exhaust (1/4" NPT). Can I route the CCV into this and have it route into the exhaust. Do you think this is too much of a step down? 3/4" to 1/4".
I don't have a cat or muffler.
I guess the other thing would be, would the exhaust in the down pipe actually increase the pressure of the crankcase. I could install a check valve, but if the pressure of the exhaust is higher, then it'll prevent CCV flow.
What do you guys think? If I were to do it, come off the DP w/ a 1/4" MNPT to 1/2" Tube Compression, SS Tube over the engine and then Union w/ 3/4" Hose barb x 1/2" Tube Stub, then about 6" of heater hose.
I don't have a cat or muffler.
I guess the other thing would be, would the exhaust in the down pipe actually increase the pressure of the crankcase. I could install a check valve, but if the pressure of the exhaust is higher, then it'll prevent CCV flow.
What do you guys think? If I were to do it, come off the DP w/ a 1/4" MNPT to 1/2" Tube Compression, SS Tube over the engine and then Union w/ 3/4" Hose barb x 1/2" Tube Stub, then about 6" of heater hose.
Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
I'd just vent it out wherever you're comfortable. I have mine run back by the exhaust exit, but you can drop it straight down the side of the motor, or out the side by the driver (or passenger) door, etc.
The thing with the bung in the exhaust is that it's been tested and it created positive pressure in the wrong direction, just when you need it to be the other way (heavy acceleration). I forget who did it, but maybe they'll chime in. You want a slight vacuum or at least very little back pressure there. Definitely don't want positive pressure!!!
Joe
The thing with the bung in the exhaust is that it's been tested and it created positive pressure in the wrong direction, just when you need it to be the other way (heavy acceleration). I forget who did it, but maybe they'll chime in. You want a slight vacuum or at least very little back pressure there. Definitely don't want positive pressure!!!
Joe
Post Fiend
Joined: Jun 2004
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From: Parker, CO
Do NOT put it in the downpipe. Way too much exhaust pressure there. You'll start leaking oil like crazy.
I think CSIPSD at one time had his routed in the exhaust tailpipe, but took it off. Maybe he'll chime in as to why.
I think CSIPSD at one time had his routed in the exhaust tailpipe, but took it off. Maybe he'll chime in as to why.
Lead Driver
Joined: Jan 2006
Posts: 7,308
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From: Hartford, WI
Originally Posted by Pocket
Do NOT put it in the downpipe. Way too much exhaust pressure there. You'll start leaking oil like crazy.
I think CSIPSD at one time had his routed in the exhaust tailpipe, but took it off. Maybe he'll chime in as to why.
I think CSIPSD at one time had his routed in the exhaust tailpipe, but took it off. Maybe he'll chime in as to why.
Post Fiend
Joined: Jun 2004
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From: Parker, CO
Originally Posted by powerstroked162
If you make the angle to were it isnt taking on exhaust pressure but rather using exhaust pressure to create a venturi effect then you'll be good. Its all in the angle
Cowboy Steve
Cowboy Steve
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From: North of Greenville
What I've seen before is that the bung must be welded in at something like the 45 degree angle in the pic below.
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Joined: Apr 2004
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From: Ellensburg, Washington
Pocket- I didnt state to put the tube on the EGT bung, i meant to install a pipe in the exhaust pipe to make a the venturi effect. I gurantee it dosnt work in the EGT bung cause that angle would be taking on pressure. lol, I have a little more brains then that, just a little....
Cowboy Steve
Cowboy Steve
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From: North of Greenville
Steve, I would think that it would be best to get a little further downstream from the downpipe and get into your 5-inch system. You'll still have plenty of velocity to induce a vacuum and less chance of so much pressure that you pressurize the CCV.
Postmaster
Joined: Apr 2004
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From: Ellensburg, Washington
I agree. I was gonna run my tube into the exhaut right at the last bend in the pipe out the back. This should produce enough vac-u-suck to pull the fumes outta the crank case.
Cowboy Steve
Cowboy Steve
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From: Parker, CO
Originally Posted by powerstroked162
Pocket- I didnt state to put the tube on the EGT bung, i meant to install a pipe in the exhaust pipe to make a the venturi effect. I gurantee it dosnt work in the EGT bung cause that angle would be taking on pressure. lol, I have a little more brains then that, just a little....
Cowboy Steve
Cowboy Steve
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Mine just go down by the lower driveshaft, i have never seen oil driping from it on the ground. It sometimes will show smoke coming out of my wheel well. Best spot i belive since international vents them the same way.