oil catch can [Merge]

[Rice Burner]

I just ordered my intake and K & N filter from Dejon and now I'm looking for a Catch Can. Does anyone know where I can get one of these? I have looked on some web sites with no luck, with the exception of (i think) Machv for $99.

Any help would be appreciated.

Also does anyone know if any one sells the rubber window trim that goes on the door for the window. You know the one at the top of the main part of the door on the outside. The black coating has pealed off and looks pretty bad.

Thanks in advance!

 

[No_Skillz]

Yeah what he said.

I've thought long and hard on how to improve the stock setup, each time to come to the conclusion that the mitsubishi engineers might have been pretty damn good at what they do.

 

[JayRolla]

It may affect the A/F but does it affect it enough to cause any problems? I dont think it does.

 

[staticbrainwash]

I have no problem returning the system back to what it was (though at this point requires me drilling my hard pipe). I just didn't think that it was possible. Though it makes sense i guess, i just have never heard anything like this until recently.

And yet again a subject the Mods/wisemen will argue.

I guess my major question is, since it acts as a vacuum leak under vac will it cause a boost leak under pressure. Or no, because the PCV at the point of pressure is closed, therefore not letting anything out.

 

[skinnykenny84]

good question

 

[1stGenRocks]

if the pcv valve is working correctly it will not be a boost leak.

 

[mirkoelek]

No thinking needed. Correct way is back to the intake. Right now you are messing up your A/F. This topic is a bit so do some searches.

http://www.dsmtuners.com/forums/showthread.php?t=232883
http://www.dsmtuners.com/forums/showthread.php?t=221091

Not necessarily, If you have anything to tune your car with, that shouldnt be an issue.... Piggyback would work...

 

[Defiant]

Now does this mean everyone will notice it on the buttdyno, probably not since most are probably running with boost leaks anyway but the answer to "whether it will affect A/F" is "yes".

Eh. Not enough to make a difference in anything.
Quick, somebody grab a dyno.

 

[Stanford]

Low trim is only idle.


So you should specify it will only affect it at *idle*, if anything so the newbs understand.

It's closed under boost and the other breather doesn't care where it breathes to. A catch can will not and does not affect A/f in any important circumstance. If it does *slightly* affect it at idle lean out the AFC/Emanage/EMS/Link/ETC a little and be done with it.

PCV's and Breathers back into the intake are for tree huggers and people who enjoy having filthy intakes, intercoolers, and intake manifolds.



I wish I could figure out why everyone made this so complicated.

 

[oldman]

PCV's and Breathers back into the intake are for tree huggers and people who enjoy having filthy intakes, intercoolers, and intake manifolds.

Why don't you take a quick read and learn about the true functions of the pcv system before you make a generalized/ignorant statement. The question the original poster asked was will it affect a/f ratio and the factual answer is yes no matter how minute the effects may be. A/F effects however, is not the main reason why one should not remove vacuum from the pcv system, venting the breather I understand (actually not since the solution is as simple as an inline filter/catch can like the one defiant posted) but the pcv should not be removed unless replaced with a vacuum pump of some sort because ventilation (not pressure relief but the swapping of blow by with fresh air) of the crankcase depends greatly on a vacuum source (pcv) and supply of fresh air (breather). A vented catch can setup with the pcv disabled will be enough to relief pressure if the motor is in good condition but will do very little to ventilate dirty air out of your crankcase once the pressure is equalized and most of the fuel mixture will end up in your oul. Ever wonder why your catch can smokes after hard runs? Ever wonder why your oil smells like gas all the time?

There are many threads specifically discussing ways to keep your intake tract clean while maintaining the integrity of the pcv system, creating other problems in attampt to solve another (ie venting both pcv and brather to a catch can) is no solution if you ask me.

 

[skinnykenny84]

how is your pcv system set up on your car Bruce?

 

[oldman]

how is your pcv system set up on your car Bruce?

Prior to my teared down two weeks ago, OEM pcv to IM, ebay inline catch can (not just an empty can but with an internal filter) back to the intake pipe. I use to vent both to the ebay can with one of the can fittings VTA, constanly getting this goo mix of oil and fuel in the can instead of just oil like it's suppose to be, my whole car smells like gas all the time especially after openning the oil cap or pulling the dipstick, my oil no longer look dark black like used oil should (instead it looks dark greenish black, kinda like coolant mixed with oil but not as bad), All of my polished components that I spent weeks on are no longer shinny, weird stutter at light throttle......etc.

To top it off, on the first freezing winter morning after I VTA, the goo that was stuck on the internal filter in the catch can froze and took out my turbo and valve seals. I did some extensive research and reading on the subject and decided return everything back to stock with an addition of the catch can situated inline and reroute back to the intake pipe to keep my IC clean (alot more important than IM, I have not seen a drop of oil in my turbo or IC since). All of the side effects of VTA was gone including light throttle stutter, the whole car just feels smoother over all.

A brand new JM SMIM and engine is going back in and I'm thinking of a second inline catch can with either an OEM pcv or an aftermarket check valve attached to the can, or I might just let the SMIM be dirty, doesn't really hurt anything except for maybe resell value. I have gone around the world on this issue, learned my lessons and ended up in the same place I started. I'm just happy to know that all the parts I just spent last 3 days re-polishing as well as my JM will stay shinny externally this time.

 

[staticbrainwash]

Oldman, do you mind taking a pic of your dejon pipe with the fitting installed? I'd just like to see what i'm shooting for when i drill my dejon and put in a catch can.

 

[oldman]

Everything is out of the car right now, sorry about the camera phone.

 

[mirkoelek]

Come on guys, if you only have a safc or any other fuel control system you dont need to do all this.... You already cheat on your ECU anyway, just Compensate for less air , add less fuel and you're done...My suggestion, get rid of the PCV gasses by hooking up the catch can wihout routing back to the intake...RESULT is clean piping less smoke coming out of your exhaust, clean IM and TB .... Somebody said that there is 70% of fuel in those gasses, so what... To lean your mixture you dont need more fuel to come in... God bless that you can can control your fuel for lees than $500 with great success....

 

[KGB Pilot125]

Come on guys, if only have a safc or any other fuel control system you dont need to do all this.... You already cheat on your ECU anyway, just Compensate for less air , add less fuel and you're done...

What does a Safc have to do with a catch can, PCV and and proper routing of the emmisions systems?

 

[mirkoelek]

What does a Safc have to do with a catch can, PCV and and proper routing of the emmisions systems?

Why would you reroute back to the intake?

 

[staticbrainwash]

Thanks oldman. You said you just used jbweld to make sure it didn't back itself out of the threads? This is something i'm going to do just for the sake of not having to keep buying those shitty breather filters.

Thanks.

 

[oldman]

Thanks oldman. You said you just used jbweld to make sure it didn't back itself out of the threads? This is something i'm going to do just for the sake of not having to keep buying those shitty breather filters.

Thanks.

I used thread sealant and then jb weld around the fitting after it's threaded in. Many have said in this thread, including myself, that the a/f effects with a vented breather is something most can live with. My point is why not run it correctly while keeping the engine bay clean, why live with something when you don't have to?

Why would you reroute back to the intake?

Why not?

 

[mirkoelek]

I used thread sealant and then jb weld around the fitting after it's threaded in. Many have said in this thread, including myself, that the a/f effects with a vented breather is something most can live with. My point is why not run it correctly while keeping the engine bay clean, why live with something when you don't have to?


Why not?

Tell me why would you, and I'll tell you why not....

 

[staticbrainwash]

Did you read ANY of this thread Mirk? He gave a plethora of reasons.

 

[mirkoelek]

Did you read ANY of this thread Mirk? He gave a plethora of reasons.

I believe Mitsubishi engineers did this only for emission purposes and to save some gas...My whole point was if you have anything to tune your car with, you can get rid of any difference that it makes

 

[oldman]

I believe Mitsubishi engineers did this only for emission purposes and to save some gas...My whole point was if you have anything to tune your car with, you can get rid of any difference that it makes

So your reason for venting is because you can? The fact you're still talking about a/f ratio and you think that pcv is only for emissions tells me that you didn't read this thread or the link I provided because you lack the understanding of a pcv system. If you want to have a intelligent discussion about this I'm all ears but you must be willing to listen.

 

[staticbrainwash]

So all in all, if i ended up picking up maft in blowthru i would be ok to vent it out? Makes sense if you can vent a BOV with maft too. Maybe ill just pick up an maft set-up. Granted it's a bit more expensive, but will only help in the long run.

 

[mirkoelek]

So your reason for venting is because you can? The fact you're still talking about a/f ratio and you think that pcv is only for emissions tells me that you didn't read this thread or the link I provided because you lack the understanding of a pcv system. If you want to have a intelligent discussion about this I'm all ears but you must be willing to listen.

Is your crank pressure always the same ?! at 10 miles on the engine or 100,000 miles.... If yes i agree then, but what if it changes in time, you'll for sure have more unmetered air....Your ECU wont know how much crank pressure do you have.... Of coure you ECU datalog will change after you put that air back into the intake, is that a huge change....And that is only at the idle, do you know what happens at WOT.... Here is the link from RRE, they didnt route back to the intake

http://www.roadraceengineering.com/instructions/catchcaninstructions.htm

 

[mirkoelek]

Since a PCV system is already accounted for in the sotck a/f feedback system,".

How do you know is this metered air....How would you know that this is always the same amount of air...

The only thing I'm trying to say here is, no meter how much your A/F would change, you can adjust it with fuel control device....
I agree there has to be a change, and this change can be fixed...95% of people here has a boost leak(most of us dont know that we even have it) , which i believe is more hurting than this issue with PCV route...