What to do with pcv valve when setting up catch can
11-12-2004, 10:57 PM
#21
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Re:What to do with pcv valve when setting up catch can
Originally Posted by Stealthmode
My valve cover breather is always blowing air. How is that an air inlet. 
11-12-2004, 11:00 PM
#22
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Re:What to do with pcv valve when setting up catch can
you're not gonna feel any difference, i think you won't. but the instructions in the diagram say to use a 90 degree fitting-which is hollow. so i just decided to hollow out my pcv valve. if it's hollowed out, it would be easier for the oil vapors to escape the crank case since the pcv valve will have a bigger openning and it won't have a spring and a round plate in the way. just put some thought into it. this isn't gonna give you more horse power, but i'm just explaining the logic behind it. it will keep oil out of the intake manifold though, even if you do hook it upto the compressor intake pipe.
11-12-2004, 11:06 PM
#23
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Re:What to do with pcv valve when setting up catch can
I'm not saying that it would give me more hp but would it make much of a diff hollowing it out or not. I figured as long as the pressure is relieved you're fine. :P
11-13-2004, 11:05 AM
#26
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Re:What to do with pcv valve when setting up catch can
hey i dont mean to butt in but i keep reading posts about how/why what should you do about the pcv valve!
to my knowledge and correct me if im wrong but the whole point of it is to release the pressure built up in the bottom end,
now fresh air goes in the valve cover down the oil ways mix with oil vapour goes through the standard catch can on the back of the block up a little black hose through the pcv valve and in to the inlet mani
its basicly a one way system which works by vacum!
now when a turbo is added its turned in to a positive system
which is not good
so by moving the hose that goes to the inlet mani to the air intake on the turbo it becomes a vacum system again
by adding another catch can in between the line that goes from the pcv valve to the air intake on the turbo will further more remove oil from the oil vapour mix
this is good becuase the oil in the air vapour going back in to the air in take reduces the fuel octane thus reducing power
now some people say that they have done this but still get oil/air coming out of the breather valve, like me but only a small amount, this might be because of a few reasons!
#1 blow by gas ie. ---- rings, high miles.
#2 valves not seated properly ie. didnt lapp the valves in properly, high miles.
#3 valve stem seals ie. put in incorrectly, high mileage.
im putting the reason why mine dose it down to high miles
mines done over 150000mls boosting 12psi untuned
but she pulls strong and no sign of pain yet so being half chineese i stand by the phrase of,
if ain't broke dont fix it
to my knowledge and correct me if im wrong but the whole point of it is to release the pressure built up in the bottom end,
now fresh air goes in the valve cover down the oil ways mix with oil vapour goes through the standard catch can on the back of the block up a little black hose through the pcv valve and in to the inlet mani
its basicly a one way system which works by vacum!
now when a turbo is added its turned in to a positive system
which is not good
so by moving the hose that goes to the inlet mani to the air intake on the turbo it becomes a vacum system again
by adding another catch can in between the line that goes from the pcv valve to the air intake on the turbo will further more remove oil from the oil vapour mix
this is good becuase the oil in the air vapour going back in to the air in take reduces the fuel octane thus reducing power
now some people say that they have done this but still get oil/air coming out of the breather valve, like me but only a small amount, this might be because of a few reasons!
#1 blow by gas ie. ---- rings, high miles.
#2 valves not seated properly ie. didnt lapp the valves in properly, high miles.
#3 valve stem seals ie. put in incorrectly, high mileage.
im putting the reason why mine dose it down to high miles
mines done over 150000mls boosting 12psi untuned
but she pulls strong and no sign of pain yet so being half chineese i stand by the phrase of,
if ain't broke dont fix it
11-13-2004, 11:31 AM
#27
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Re:What to do with pcv valve when setting up catch can
That part I already knew....my post was what to do with pcv valve as in should I hollow it out or leave it stock before I run it to my can. Good info for the newbs anyways and by the way I'm full chinese. 
11-13-2004, 12:38 PM
#28
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Re:What to do with pcv valve when setting up catch can
oh right! well the answer to that yes for less restriction
no if your a lazy ***, like me
And as for being full chineese i bet you dont fix a ------- thing, even when its broke!
only messing!!
no if your a lazy ***, like me
And as for being full chineese i bet you dont fix a ------- thing, even when its broke!
only messing!!
11-13-2004, 01:18 PM
#29
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Re:What to do with pcv valve when setting up catch can
well this has nothing to do with the pcv but i did the catch can thing like in the pic above. then i had the intake air temperature sensor hanging-this is the one that goes mounted in the stock plastic air intake tube-. i installed a plastic 5/16" T into the BOV hose and a 3 inch long 3/8" id hose to the T and the ait in the hose. since i did this the car runs smoother and idles smoother, it also has a little more low end power. something so simple to do, yet the iat sensor was just hanging there cause i was too lazy to mount it somewhere where it could actually do its' job. 
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