Vented cans will never out perform a sealed system. At best you'll get 0psig in the crankcase. It'll never see vacuum.


For the FP ball bearing stock frame turbo's, it's become pretty well known they need more than just the enlarged fitting on the driver side of the valve cover.

 

Only if you're drilling/tapping larger fittings AND using a sealed system sure.

But a sealed system using OEM outlets not a chance.

I also do not agree, considering I've installed probably 120 FP turbos on customers cars at my shop. Opening the side hole none of them have crankcase issues afterwords.

Id gladly take $150 + shipping over a $650 catch can system.

 

Something we noticed that cures oil pooling up on the BB FP stuff is enlarging the oil return line to the pan. All turbos are sensitive to the way oil is returned back to the pan.

 

The STM can uses a 10an fitting, and 6an fitting and lines off the valve cover. Then 10an to the intake pipe, and 6an to the intake manifold. It does not use OEM outlets.


Not sure you enlarge the drain line. Even with a 10an return line, the ID of the 10n fittings is about the same as the stock return line.

 

Well I'm just going to state the obvious below so we are on the same page:

The push in fittings are not enlarging the existing diameter of the hole they are being pushed into on the passenger side of the cover where it's most baffled. The only way to enlarge the hole is to drill it open larger. You can push a fitting in and make the end fitting work with a larger AN fitting, but at the end of the day you're still bottle necked by the smaller hole you just pushed the bigger adapter fitting in.

The rear PCV once removed all the fittings behind the valve cover and you push that fitting in, yes that one gets quite large. At least -10 from what I seen in person from it.

Only bad thing is, that ones not as well baffled as the passenger side front one that from factory connects to the intake.

 

Apparently you don't have any experience with the STM system. I've installed three. It's a 10an fitting pushed into the PCV port on the valve cover. And all three I've installed never have oil in them, just a bit of ethanol goop.

And yeah, no **** if you for some reason have a 10an push in fitting for the stock hole on the driver side of the cover, it's not enlarging the hole for more flow. Come on man... I think I deserve a little more credit than that.

 

I specifically stated that the rear PCV hole is of decent size if you read above. Even mentioned -10.

Also yes I'm referring mainly to the driver side. You would be surprised how many people think just because the push in fitting is larger on the outside it made the hole bigger on the inside. I know its common sense, but I've had that convo with many people who said otherwise.

Regardless our modification to the side valve cover vent cures all issues so i have no need to sell other systems. I have worked with many cars that utilize the can you're referring to. Its also how I knew the PCV side is of decent size from factory once you remove all the attachments from the cover.

Also the rear PCV does push more oil. If you leave it open to vent you will get a oil mess vs the side driver port you can leave it open and not a droplet of oil will come out because of how the baffle is designed inside.

The main culprit of the oil puddles in the turbo inlet are the return line if the driver side cars opened 5/8" which I mentioned in this thread years ago but it is lost in this long thread.

 

Update, my FP Red went back to FP to be checked. Turns out the bearing housing was worn way out of spec. I guess you get what you pay for when buying used.

Should be back in a week or two with a new stainless CHRA and then I can see if my issues are gone or severely diminished.

 

Can you do me solid and post pics of the catchcan installed? You think it'd be possible to mount it anywhere else besides off the front of the trans?

And what do you think it weighs?

 

Once my car is back I can. You could probably fab a mount for it to put it on the firewall or maybe where the fuse box is if you've relocated that. I'd say without the lines it probably weighs 1-2lbs max.

 

You are correct, I've learned this the hard way as well with used turbos. Never again! You're problems will be solved after the new CHRA and fresh rebuild I am sure of it. Your oil pooling wasn't from crankcase pressure issues.

 

Did my crank case elimination today! 3 - 5/8 holes tapped to 1/2 npt.

 

I thought that drilling and installing a vent fitting near the end of the intake cam, drivers side towards the rear of the car is a recipe for oil in the catch can?

 

I had several 4G63 valve covers. And not one of them had oil in catch can with this mod.

 

Is there any relationship between Crankcase pressure, sludge formation and the oil grade used ?