[7mgte is a pos]

As you can see in the pic below , the PO put a filter on the end of the pvc system, should i take that off and put it back into the s tube before the turbo? or just leave the filter on there, I really dont know whats the difference.

 

[Hitman]

Get rid of that filter, you are asking for problems with those things.

 

[7mgte is a pos]

what kind of problems does it cause?

 

[Hitman]

Well just leave it on, and forget about it. Or take it off and never worry about forgetting to check it.

 

[7mgte is a pos]

-.- i just wanna see the pro and cons of it on or off. i guess tomorrow ill take it off

 

[Ryeno]

I'd hook it back up. I'd also add a recirculate kit to the hks bov or replace it with a recirculated bov like this
http://gallery.sanitylapse.com/v/supra/Bosch+110+BOV+Install/

 

[7mgte is a pos]

^ bought one from barkz last night

 

[CheesePhantom]

Unless you're tuned, I would hook it back up to the S Tube. I just don't see the advantage in running a breather.
It's the same result, it just ruins your A/F ratio.

 

[BlackDevilSupra]

Are you running a VPC or other speed density engine management device? I'm surprised the car even runs or idles properly, since you presently have the AFM installed and connected.

Edit:
I just noticed that the mini filter is on the PCV path, and not the ISC. Errr on my part.
Follow the other comments provided... they're on point

 

[adam pecush]

for future reference, it is PCV. (Positive Crankcase Ventilation)...

PVC is something completely different.

 

[Juhanis]

here are the pro's and cons i see to having your pcv set up with a filter at the end, or going back into the turbo.

pros:
-no oil in the intake from the blow by (all engines have some)
-you can tell right away if its getting worse if you're always looking under the hood. usually when ring lands crack, or when compression rings are losing their ability to seal properly. ps: detonation is the usual cause to this stuff happening to an engine.
-dont have the possibility of compressor surge going back up into through the pcv system. (good for seals)

cons:
-oil may get onto the exhaust from there (from the problem listed above)
-you lose the slight low pressure effect of being right before the turbocharger and having the higher pressure pcv gasses flowing (scavenging effect, which promotes piston ring to cylinder wall sealing)


i'd say if you want to be very sure that you're doing the right thing get a catch can and run it back into the intake. keep in mind that the air coming from the pcv has already been through combustion. so venting this to atmosphere is going to have much less of an effect of how the car runs when compared to open atmosphere blow off valves on a mass airflow metered (or karman vortex) system. i vent it to atmosphere, but i have a full standalone... but i did it on the stock ecu too. guess i'm a hypocrite =P bottom line: either way is fine, you may make a butthair more power having it routed like stock.

 

[7mgte is a pos]

Unless you're tuned, I would hook it back up to the S Tube. I just don't see the advantage in running a breather.
It's the same result, it just ruins your A/F ratio.

Car idles at 700rpm with the filter on it, im going to re route it today and see the difference

Are you running a VPC or other speed density engine management device? I'm surprised the car even runs or idles properly, since you presently have the AFM installed and connected.

No i do not, i got the with it on.

for future reference, it is PCV. (Positive Crankcase Ventilation)...

PVC is something completely different.

Oh my bad sorry didnt know

here are the pro's and cons i see to having your pcv set up with a filter at the end, or going back into the turbo.

pros:
-no oil in the intake from the blow by (all engines have some)
-you can tell right away if its getting worse if you're always looking under the hood. usually when ring lands crack, or when compression rings are losing their ability to seal properly. ps: detonation is the usual cause to this stuff happening to an engine.
-dont have the possibility of compressor surge going back up into through the pcv system. (good for seals)

cons:
-oil may get onto the exhaust from there (from the problem listed above)
-you lose the slight low pressure effect of being right before the turbocharger and having the higher pressure pcv gasses flowing (scavenging effect, which promotes piston ring to cylinder wall sealing)


i'd say if you want to be very sure that you're doing the right thing get a catch can and run it back into the intake. keep in mind that the air coming from the pcv has already been through combustion. so venting this to atmosphere is going to have much less of an effect of how the car runs when compared to open atmosphere blow off valves on a mass airflow metered (or karman vortex) system. i vent it to atmosphere, but i have a full standalone... but i did it on the stock ecu too. guess i'm a hypocrite =P bottom line: either way is fine, you may make a butthair more power having it routed like stock.

thank you very much for your help.

 

[7mgte is a pos]

Nvm i dont have any tubing that will fit that, and my car isnt street legal atm -.- gotta wait till somebody comes and picks me up

 

[boostinprine]

take that filter off... Right now its just VC cuz there is nothing positive about just having atmosphere on the filter.
This is one of the biggest mis-understandings people have about these systems and what there needs to be. Just having a filter on there only alows built up pressure to be released, which is ok. but your not gaining anything except for oil entering the turbo and intake system.

Which if your worried about oil, get a decent oil catch can and re route it to the turbo inlet. This will get you vaccum on the valve cover and no oil in the intake.

The other option you can do is Exhaust scavange PCV which you put a check valve onto a pipe welded in the exhaust stream that as exhaust passes the tube creates vaccum. not ideal for daily driven cars, but spirited driving or race applications works very well and will actualy increase HP and no oil.

so if you just want to get rid of the oil film on the intake, get a catch can and re route it back to the turbo. If you have any questions just hit me up.

 

[7mgte is a pos]

By putting it back into the turbo inlet will this change my afrs?
im also recirculating my bov back into the turbo inlet.
atm my exhaust smell is just gas, i can get dizzy from my exhaust just by sitting behind it on idle.

 

[spoolin-mk3]

Get an oil catch can

 

[Juhanis]

^^ what he said about the exhaust scavenging... that works too. but i say get a catch can too =)

 

[7mgte is a pos]

Alright so i put a hose on it , and idk if its just me but it seems to rev a bit faster and idle a bit higher but no more misfireing at idle
also before i would pump my brake pedal while in park and my car would just die, now the idle is steady. i also replaced the cold air idle valve hose old one was cracked. gonna recirculate my bov when i get the part in

 

[7mgte is a pos]

also it idles about 1.2k when the cars hot, it was above the Min line , maybe i should reset the ecu? or maybe my timing is off, ima take it to a local shop so they can do my timing and have it perfect

 

[7mgte is a pos]

A friend of mine at autozone who also owns a supra, (7mgte) he has his pcv hooked up were he has both valve covers routed routed together with a hose ( jz style)and caped the nipple on the throttle body . does this do anything? its a much cleaner look imo