Did i hook up the Oil catch can right?
 

not sure if i did it right. I dont see any oil going through the PCV tube into the catch can.

http://lh4.ggpht.com/_uzUzVzeT3VA/Sm...0/DSC_0915.JPG

http://lh5.ggpht.com/_uzUzVzeT3VA/Sm...0/DSC_0916.JPG
http://lh5.ggpht.com/_uzUzVzeT3VA/Sm...0/DSC_0917.JPG
http://lh5.ggpht.com/_uzUzVzeT3VA/Sm...0/DSC_0918.JPG

from the factory, the vaccum in the intake pulls the blowby out of the valve cover.
u have nothing pulling, just 2 pressurized ports that are hooked up to a filter

this will work, but i would do a search and read up on it, plenty of times this has been talked about.

That what i thought actually. what would be the right way?

yank the valve on the cold side. Less restriction = nguyen

so whats the right way to hook this up?

The way you have it without the valve. Anyone who tells you to pull vacuum off the motor wants you to fail with detonation. In a daily driver turbo car, you're fine, in a track toy you're going to detonate.

So, do I just remove the valve and route the tube right into the catch can? Should I keep the intake plug capped like I have it now?

yes, the one-way valve is unnecessary. If you're not popping the dipstick out, then don't worry about it.

lulz.......ricer.

Having no idea what the breather/PCV does = fail. They're designed the way they are for a reason.

I know how what the valve does. That's why I want to figure how to make the whole thing work better. I think I have lots of blowby so I added a catch can. Can someone just tell me what's the best set up with a catch can?

Get on a racetrack some time and you'll see that you need more flow than the 1/2" port on the valve cover when in boost.

endyne

so no help then. I thought you guys know your stuff here. And no one can tell me how to properly hook up a catch can?

will this set up work? or will i have a vacuum leak where the breather is on the catch can?
http://lh3.ggpht.com/_uzUzVzeT3VA/Sm...20route%29.jpg

I just told you how to hook it up 3 fucking times, what is your fucking problem? Run each port to the fucking catch can, and shut the fuck up. Please, kill yourself.

don't forget this:

Attachment 204508

Honestly I can't say. I do believe there will be a leak from the manifold hose though. I will let others step in.

Edit: nvm, already did.

So isn't it a problem with a stock set up and a turbo? I mean when there is positive pressure in the intake it is not letting the pcv to open? so the best way would be to get rid of the pcv, run the hose from the left side of the cam cover into the catch can and same with the right side? Whats the best way to get rid of the PCV? Just make a hole in it?

^ you don't want to pressurize the crankcase, it'll blow your rear/main seals. take hustlers advice and make sure to replace the filter when clogged. The only reason to not do it that way is if you're worried about emissions

ok, sprayed, i honestly cant follow anything hustler is saying. I think he thinks he is a gangster and the way he writes it unreadable to me.

which filter are you talking about? the one on the catch can?

Flyin' Miata : Engine/Drivetrain : Internals : PCV valve for turbo applications

Call it a day

i wish i knew about that little thing from flyin miata, but i already got the catch can, so i want to use it and if it does fill up with oil i will know for sure that i have a lot of blow by.

pressure builds up in the crankcase as a little blowby seeps past the piston rings. the stock setup takes this positive pressure (along with oil vapor) out of the crankcase and reroutes it back into the intake stream to conform to EPA regulations since venting to the atmosphere is considered harmful to the environment. this oil vapor can cause detonation as mentioned. thats why we use catch cans to trap it. venting the catch can to the atmoshpere is the sure way to take the positive pressure out of the crankcase and make sure none of the vapors make it back into the intake. Actually, you could technically just leave the two ports on the valve cover open, uncapped, but you'd have oil all over you engine bay.

Yes, I was talking about the little filter on the catch can. you need to replace it when it gets saturated in oil because if the pressure can't escape it'll build up in the crankcase and blow your oil seals.

Thanks for this good explanation. Sooo, i will drill a hole in the PCV valve and route both of the port on the valve cover into the catch can and cap the port on the intake.

that should work

Really?

In all seriousness, I've never considered this, nor can I recall hearing it before now. Is the basis of the argument that oil vapor is more prone to autoignition or detonation in the combustion chamber than atomized gasoline?

the only thing i want to get rid of is possible smoking.

This is how i have mine setup.

Attachment 204507

Seriously, you never heard it before? That's the reason catch cans exist. Maybe thats why hustler is getting away with more advance compared to others

smoking? from where?

tailpipe

i see. so you left the pcv valve intact and only routed the right side of the valve cover into the catch can, right? Do you get much oil accumulation in the can?

if you're smoking at the tailpipe you may have other issues.

sbk, you have one side done, but the pcv valve is still sucking oil into the manifold under vaccum, that eventually makes it to the motor next time you boost.

yeah i know. I bet my rings are worn out a bit. But having a catch can would only help in this case.

Rushin, leave it how you first had it, but drill out your pcv valve. the end. That's all Hustler was trying to convey.

I'd at least take the filter off the top and run a hose to the intake pre-throttle body. This way any crankcase pressure get's sucked out rather than having to be pushed out.

no, that would pressurize the crankcase. for the venturi effect you're speaking of, the hose would be routed from where the filter is, to the turbo intake hose

Oops, I meant to say pre-turbo.

if you're hardcore, you can get the same venturi with no drawbacks venting at the exhaust

http://img269.imageshack.us/img269/923/bernoulli5ae.jpg

I ended up getting a 1/2 inch to 3/8 reducer instead of the PCV valve and routed the hose to the catch can. I am still thinking if instead of the filter i should route a hose to the pre-turbo nipple i have on right after the intake filter.

i tried it that way (drilled out pcv) but the car had a little stumble when pulling away from a stop. felt fine when accelerating etc.. but i just switched it back to sbk's style and it's smooth again. my catch can does get alot of oily/watery discharge in it after a trackday though.

did you do it like this?

http://boostedmiata.com/technical/catch_can.jpg

if this causes stumble you have either an airflow meter or you did it wrong.

is there anything inside the catch can?

Nothing yet. Just condensation. So should I add a hose from the preturbo nipple instead of the filter or leave it as is?

I looked at various setup's in the end i just said bollox to it and bought 2 catch cans.

The coldside has a 1 way valve as well as the PCV to stop the boost pre cam cover.
The other catch can is just connected in between the cam cover and filter.


Attachment 204483



Cheers
Mark

if you want to route it back, fill the can with something to catch the vapors. I've used used steel wool in the past, but be warned it may make its way into your motor.

if it was my setup I would leave it as it

xveganxcowboyx and I did both the compresson and leak down test yesterday.

Dry 2nd cylinder was 205psi, third cylinder was 170psi.

Oil in 2nd cylinder bumped the psi to like 235psi, if I remember correcty.
The third(bad cylinder) went up to 250psi with oil in it.

Leak down test showed moderate leaking on both 2nd and 3rd cylinders, a bit more on the 3rd.

We could not hear the air in either the exhaust or the intake. The only place we heard the air was through the oil filler cap.

However I noticed that the car smokes a lot only after hard boosting and only at idle after hard driving. When I drive nice and don't boost there is hardly any smoke. And we noticed that my drain line on the turbo goes horizontal for a while before it enters the oil pan.

I am going to remove my ac compressor that is in the way of the line an see if making the line go totally straight down will help.

nothing's going to fix that bad ring...

I know but I don't think it would be smoking tag bad with one ring bering bad. And 170 is still pretty good compression.

Had my friend drive behind my at night and the car smokes a lot! How would I check if my turbo seals are bad? I know my cold side is not leaking. The intercooler is dry.

took the DP off to see if there is any oil on the hot side: no oil, no shaft play, just a lot of carbon build up.

I wouldnt think youd see much blowby from 170psi either, but 250 wet sounds suspiciously high. I'd be willing to bet the gauge is bad and all your readings are are off by 40-50psi.

Is there a lot of smoke coming out of the oil cap?

no smoke out of the oil cap. We used two different gauges. high readings are probably because of the oil collecting in the pistons. I am going to redo my catch can and see if that helps.