Valve Cover AN Breather Setup Question

[JayB12]

Okay so I am going with a Calan catchcan setup here soon and I have a question for those of you running an AN valvecover setup. Where did you put your fittings and WHY? I have seen a few different placements but I've never seen real reasoning on why. Was it easiest? Cheapest? Most effective? Or just the only way it fit? What about your fitting on the intake?

I plan on doing the VS2 can and 2 -8 fittings on the valvecover and a -10 line to the intake. Probably going with the aluminum baffle as well.

If you have information or pictures of your setup that would help.

Thanks!

 

[Dyesuperman]

I put my fittings on top of the valve cover because I wanted to retain the pcv valve rather than eliminating it and using the factory holes.

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[JayB12]

What are the pros and cons of retaining stock pcv versus eliminating it? I assume just a little extra help of the factory system. Right?

 

[TSiAWD666]

I was having problems with oil filling my intake. My car is used for road course work and it was getting so bad I was having constant smoke and sputtering with your run of the mill catch can on the stock port locations.

After lots of research, mainly thanks to insight from Marco@Magnus and his experience with Andrew Brilliant's car and others, I came to the conclusion that the issue was oil was pooling in the head. This was due to lateral gs and poor drainage on the dsm 4g63 block... oil would get into the head, slosh away from drainage, and just kind of hang around in the head. Under lateral gs this excess oil would be pouring out the side port right into the catch can where it would fill the catch can and have enough oil spray to still get sucked right into the intake. I had a kiggly hla regulator which wasn't enough to keep the oil out up there.

So what I did was move my ports vertically and a bit inboard to prevent the oil from sloshing into them. I still kept the stock valve cover baffling too. I also wasn't sure my issues weren't crankcase pressure related (I didn't have a sensitive enough pressure gauge to verify this) so to try to make sure that wouldn't be a future problem I went a bit overboard to -10AN ports/lines, two of them, going to my catch can. I still feed vacuum from my intake pipe because as I understand it that can help seal the rings and prevent blowby. I also had the PCV valve line removed because well, my car's a racecar haha and I wanted to remove that point of failure. I still think it's needed for cars in general to cycle gases through the crankcase but I figured I will blow my engine for other reasons before the lack of circulation kills it (I have no scientific data to justify this silly reasoning of mine btw).

Greengoblin did my valve cover work and graciously provided the laser cut baffles. Calan did the custom catch can per my specs. Mach V did the catch can mounting (was for my previous Saikou Michi catch can system but I adapted it to Calan's).

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I should point out my fittings and line routing are only possible because of the bulbous hood that I have. Most hoods will not clear such a layout. There are lower profile orb fittings you can use for the VC, or you can cut down aluminum ones and then have them welded, in order to gain clearance on stock-like hoods.

edit - forgot to say that after installing this system the filling catch can and oil in the intake issues disappeared completely.

 

[JayB12]

That is a nice setup but with my hood clearence I doubt that would ever fit. Plus I just got a cool Mitsubishi valvecover so I don't want to mess up the lettering.

Basically I am going with one of three ways and I want to know which will work best if any are better and why.

1) Two 90* fittings exactly like the second post.

2) Fittings in stock positions deleteing the factory pcv.

3) Two fittings off the left side of the valvecover.

Also where is a good place to get cheap SS line and fittings?