What's the easiest way to avoid pressure in the crank case?
09-25-2005, 06:05 PM
#41
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Re: What's the easiest way to avoid pressure in the crank case?
Originally Posted by Sideout
Originally Posted by random-strike
jesus christ
IF YOUR PVC SYSTEM IS WORKING CORRECTLY THERE IS NO PROBLEM
IF YOUR PVC SYSTEM IS WORKING CORRECTLY THERE IS NO PROBLEM
there is also a valve cover breather on hondas so pressure can escape there. the breathers on the valve covers of most motors release pressure. the pvc sucks crankcase air/oil grimey air/oil/nasty mixed air into the intake stream for emissions.
The Positive Crankcase Ventilation valve is an emissions control device that routes unburned crankcase blowby gases back into the intake manifold where they can be reburned.
The PCV system is one of the oldest emission control devices, and also one of the most beneficial. Besides totally eliminating crankcase emissions as a source of air pollution, the constant recirculation of air through the crankcase helps remove moisture which otherwise would cause sludge to form.
09-25-2005, 07:51 PM
#42
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Thread Starter
Join Date: Jul 2005
Posts: 134
Re: What's the easiest way to avoid pressure in the crank case?
Originally Posted by random-strike
Originally Posted by Sideout
Originally Posted by random-strike
jesus christ
IF YOUR PVC SYSTEM IS WORKING CORRECTLY THERE IS NO PROBLEM
IF YOUR PVC SYSTEM IS WORKING CORRECTLY THERE IS NO PROBLEM
there is also a valve cover breather on hondas so pressure can escape there. the breathers on the valve covers of most motors release pressure. the pvc sucks crankcase air/oil grimey air/oil/nasty mixed air into the intake stream for emissions.
The Positive Crankcase Ventilation valve is an emissions control device that routes unburned crankcase blowby gases back into the intake manifold where they can be reburned.
The PCV system is one of the oldest emission control devices, and also one of the most beneficial. Besides totally eliminating crankcase emissions as a source of air pollution, the constant recirculation of air through the crankcase helps remove moisture which otherwise would cause sludge to form.
Okaaayyyyyyy, I'm pretty sure my car doesn't have a pcv system, it's not a honda (bmw). It has a hole in the valve cover with a tube leading it into the intake side. So in boost, it will see pressure and shoot pressure in. Can I just unplug it and be good? Just add a little filter on the breather hole right?
09-25-2005, 07:59 PM
#43
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Re: What's the easiest way to avoid pressure in the crank case?
Originally Posted by progress
Originally Posted by random-strike
Originally Posted by Sideout
Originally Posted by random-strike
Okaaayyyyyyy, I'm pretty sure my car doesn't have a pcv system, it's not a honda (bmw). It has a hole in the valve cover with a tube leading it into the intake side. So in boost, it will see pressure and shoot pressure in. Can I just unplug it and be good? Just add a little filter on the breather hole right?
09-25-2005, 08:21 PM
#44
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Re: What's the easiest way to avoid pressure in the crank case?
im sure it has a pcv somewhere.
but what you are refering to is the breather, on most new cars the breather is plumbed into the intake tract. for the same reason the pcv is.
yes, plug the hole in your intake and put a little breather filter thing on the valve cover, or leave it wide open it doesnt matter.
here is how my two cars are setup.
notice the valve cover breather is left open.
notice the there used to be a line going from the TB to the valve cover. i took the line off and plugged the TB hole with a small peice of hose and a bolt, and put a little ricer breather on the valve cover.
im such a good admin
but what you are refering to is the breather, on most new cars the breather is plumbed into the intake tract. for the same reason the pcv is.
yes, plug the hole in your intake and put a little breather filter thing on the valve cover, or leave it wide open it doesnt matter.
here is how my two cars are setup.
notice the valve cover breather is left open.
notice the there used to be a line going from the TB to the valve cover. i took the line off and plugged the TB hole with a small peice of hose and a bolt, and put a little ricer breather on the valve cover.
im such a good admin
09-25-2005, 08:30 PM
#45
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Join Date: Apr 2003
Posts: 11,058
Re: What's the easiest way to avoid pressure in the crank case?
Originally Posted by highroller54
if you have enough vacume to run a pcv valve there then your air cleaner is pluged
gee, that's breaking news, i guess everyone's been running crank case breather kits and slash cuts to pull vacuum out of the crank case on boosted honda's all these years for no reason, all they had to do was put an new pcv valve in for 1.50
09-25-2005, 08:35 PM
#46
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Re: What's the easiest way to avoid pressure in the crank case?
Originally Posted by projekteg
Originally Posted by highroller54
if you have enough vacume to run a pcv valve there then your air cleaner is pluged
gee, that's breaking news, i guess everyone's been running crank case breather kits and slash cuts to pull vacuum out of the crank case on boosted honda's all these years for no reason, all they had to do was put an new pcv valve in for 1.50 all engines have crankcase breathers, and always have. the reason for catch cans is they catch all the nasty oil and ---- that comes out with the air moving through. ask beau how full his oil catch can is after a run. w/o the catch can there would be tons of oil blowing out of the valve cover breather all over the engine/car.
oil catch can = not needed on street cars running normal amounts of boost. if you got a race engine in your street car then i would say yah use one.
09-25-2005, 08:49 PM
#48
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Re: What's the easiest way to avoid pressure in the crank case?
Originally Posted by projekteg
actually NO you're all idiots 
, if you leave the stock pcv hooked up, it closes immediately as soon as the car see's 1psi of boost, therefore trapping ALL crank case pressure in the crank case. all a breather filter does is let the pressure out of the head once it's ALREADY BLOWN BY your rings the EASIEST way to avoid crank case pressure in boost is to totally unhook the pcv valve completely, the BEST way to avoid crank case pressure is to eliminate the pcv valve itself, but in it's place put a straight through hose going to a a source of constant vacuum, such as a slash cut in your exhaust or preturbo pipe. i know tons of people with very high hp that just take the pcv out and don't run anything and it works good enough.
, if you leave the stock pcv hooked up, it closes immediately as soon as the car see's 1psi of boost, therefore trapping ALL crank case pressure in the crank case. all a breather filter does is let the pressure out of the head once it's ALREADY BLOWN BY your rings the EASIEST way to avoid crank case pressure in boost is to totally unhook the pcv valve completely, the BEST way to avoid crank case pressure is to eliminate the pcv valve itself, but in it's place put a straight through hose going to a a source of constant vacuum, such as a slash cut in your exhaust or preturbo pipe. i know tons of people with very high hp that just take the pcv out and don't run anything and it works good enough.
09-25-2005, 08:49 PM
#49
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Re: What's the easiest way to avoid pressure in the crank case?
Originally Posted by splitime
Originally Posted by Ravage70
a healthy pvc hooked up the stock way works fine
or am i mis'reading' you?
at 0 vacuum (full throttle) the PCV valve is closed.
