Valve cover venting??

[Mackzero]

Well, what I need to know is what you all think about taking out the internal baffles/pcv valve, etc. and enlarging the ports to 1/2" I.D. or so. I am running a GT3255 turbo @ 20psi and am thinking that I need to vent the motor better to gain a little more pwr. and make things better on the engine. I have a custom catch can also. Let me know what you guys think will be the best solution, I plan on doing it when I put the HKS 272s in. (stock cams just aren't cutting it)

 

[Defiant]

You should be able to blow all the oil out of the engine in about 48 seconds.

No. Those baffles are there for a reason.

 

[Mirage2LTurbo]

You !< Mitsu Engineers

Don't remove them.

 

[doug]

I don't see the problem with removing the PCV valve and replacing it with a straight fitting, if you're using a catch can to route the hoses into. RRE recommends this as well and has a VFAQ of sorts explaining how to do it. I've been running like that for a couple years with no problems.

This may be a stupid question, but what are these "baffles" you're referring to?

 

[Mackzero]

I'm sorry I should clarify a little better. I would put in an aftermarket pcv setup of course to keep the oil in there. Sorry I did not make it clearer. And yes... ME < Mits. engineers is correct but they did not figure for bigger turbos etc. when they built the car, so maybe there is a better way to vent things.... Any more input???

 

[Mackzero]

What about doing an EVAC setup?? I just don't want any oil in my intake side anywhere.

 

[doug]

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

Just do this-- scroll down about halfway to the section entitled "Options". There's no drawback from replacing the PCV valve with a straight fitting and running it (and the valve cover breather hose) to a catch can (or at least putting an inline filter onto the other end of the hose). I didn't even have to do the rethreading part.

 

[GSX_RCR]

And yes... ME < Mits. engineers is correct but they did not figure for bigger turbos etc. when they built the car

heh heh Trust me, it's overbuilt to withstand higher boost levels. :laugh: Otherwise, it'd be a Honda.

 

[Rick4g63]

Do not remove the valve cover baffles!!
The baffles are there to decrease oil "splashing" and direct it towards the cam lobes and valve stems for lubrication.

Removal of the valve cover baffle can inherently cause oil starvation to important components of the valve train.

I drilled out the pvc valve and vent it to small plastic catch can on my car.

Sidenote: At a salvage yard here in south florida called U-PULL IT, I saw a late ('99) model hyundai exel with a non turbo 4g63, the valve cover said HYUNDAI 16 VALVE.

 

[espinelli]

I drilled out the pvc valve and vent it to small plastic catch can on my car.

I did the same thing as well as remove the line that is routed back into the intake system. I'm running both lines to the ground . Personally, I'd leave the baffles alone. They are there to help direct the oil splashs to the top side of the head which keeps it nicely lubricated.

 

[silverbulletAWD]

I haven't had enough time to do all of the experimenting I'd planned on this year but I tried something a little different (but not new) on my engine.

I made a fluted pipe (similar in design to the existing kits sold in Summit, but different in the sense that my design is efficient enough to pull vacuum even at idle) I welded that into my O2 housing and then made a small plenum in which two -6 lines come in the top and one -12 line comes out the side. The -12 goes to the O2 pipe and the -6's go to the valve cover. I didn't see how I could clear the hood any other way than putting the vents in between the spark plug holes using -6 bulkheads w/ double nuts and 90° fittings. Everything cleared nicely but the problem was that I was no longer using the stock baffles. The first time I took the car out it just about sucked the crankcase dry in a mile. Not to mention it totally smoked out an entire country block. So I made my own baffle system for the new vents. Which I though was quite clever. Still sucked oil. Although not near as bad. For now I'm switched back to a stockish' set up until I pull the engine for the season again and start the new winter project. This time I will weld bungs into the very top of the valve cover and use the factory baffles for their intended purpose. I'll just have to deal w/ hood clearance when I get there. I think this could show and impressive gain for such a simple mod when done right.

FYI- If you are just using an atmo. vent anyways. You can swap the two fittings used on your stock PCV setup around and have twice the crank ventilation you had to start with. You would also eliminate any recirculation into your intake side. Just be sure cap off the unused PCV valve that will now be in your intake mani.! I just noticed that the RRE link says about the same thing plus has pictures.

Andy