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CCV Outlet To Exhaust
http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=39082		 Page 1 of 1
Author:  mackruss [ Sun Jan 11, 2009 2:52 am ]
Post subject:  CCV Outlet To Exhaust
I know this topic was discussed in one of the CCV posts but i need some clarity as to yes you can or no you can't.

I need to replace my rear muffler tomorrow and i thought of plumbing the CCV outlet down to the exhaust with either some copper piping or heater hose and then tapping into the exhaust either pre or post muffler to get rid of the blowby.

For the engineers out there, will doing this create crankcase pressure problems with the venturi type effect caused from the exhaust gas flow or not or will there be any other problems not emission related though as my emission testing is as you know by know different to yours.
Author:  CRDMiller [ Sun Jan 11, 2009 3:21 am ]
Post subject: 
File this under, "really bad idea"
Author:  mackruss [ Sun Jan 11, 2009 8:20 am ]
Post subject: 
CRDMiller wrote:
File this under, "really bad idea"


Elaborate as to why not.
Author:  dgeist [ Sun Jan 11, 2009 9:03 am ]
Post subject: 
mackruss wrote:
CRDMiller wrote:
File this under, "really bad idea"


Elaborate as to why not.


... What is the average exhaust temp where you're inserting it? What is the flashpoint of the oil? Do you want combustion in the exhaust system?
Author:  gmctd [ Sun Jan 11, 2009 1:13 pm ]
Post subject: 
Racers do that with free-flowing exhaust piping - tube insertion can be done such that flowing exhaust gasses create a slight vacuum on the "pitot-tube" probe, aiding crankcase blowby - however, there is little danger of burning the effluent that far past the soot trap in the exhaust pipe, as cooling thru the long tubing length prior to insertion cools the vapors, allowing the liquids to separate - could be fairly messy in the long run, considering the high volume of blowby from this 4cyl - closer to the turbine outlet, exhaust back-pressure can become problematical if the soot trap is not removed
Author:  mackruss [ Sun Jan 11, 2009 2:19 pm ]
Post subject: 
My system is catless with a free flow muffler and with the EGR plated so even without a EGT gauge i reckon my EGT's should be okay

If fitted pre muffler with a one way valve, back pressure shouldn't be an issue although the oil may clog the muffler in the long term.

The positve pressure generated from the venturi effect should be okay and there would be no clogging if fitted post muffler although i would feel bad spray painting the vehicles behind me :twisted:

I'm surprised that you lift pump fellas haven't fitted some kind of CCV pump to increase the flow through the Provent yet :lol:
Author:  ATXKJ [ Sun Jan 11, 2009 5:59 pm ]
Post subject: 
you don't want to increase flow through the Provent -
infact if you get a really good venturi design - you probably wouldn't want to do that either.

any lower pressure on the outside of the CCV will pull more oil vapor and therefore more oil out of the Crankcase.

as you make your mods - be sure to monitor your oil level.
Author:  gmctd [ Sun Jan 11, 2009 6:23 pm ]
Post subject: 
Correct - the CCV puck is also a low-pressure regulator, intended to reduce effluent-flow thru the puck in event of increased intake vacuum, like from dirty, plugged, or wet air filter - increasing crankcase pressure would then cause the valve to 'pop-off', relieving any dangerous pressure buildup
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