is it possible for some oil to leak out of the exhaust side of the turbo into my downpipe to cause this puff of smoke due to high levels of crank case pressure?

 

Yes

 

Well, what I have read here is more than enough to scare me away from any BB FP turbos. Would be nice to see a response from FP, maybe they could post a fix? When you spend over 2 grand on a turbo you shouldn't have to plumb it like a magician to keep it from leaking oil out of the compressor housing. Assuming the oil pressure is reasonable, and the drain is adequate, this should not happen.

 

Just tuned a car with a DBB Black and ~100 miles on it just before Christmas.

Tuned up fine on SD, car is fitted with 2x -10 fittings on the rocker cover to a baffled and vented can.
I noticed when doing a boost leak test prior to the tune there was an unusual amount of oil in the base of the surge slots, wiped it all out and went to clean the intake pipe and it was spotless to my surprise.

Week after owner of the car is driving around and the car has started randomly smoking like a chimney on idle and cruise. No boost whatsoever.

 

The idea is good, I created a thread on it an scraped the idea.

The issue is that you cannot have any resonators, cats or mufflers. The oil can become trapped and burst into flames.

In the future I will test it more.

 

This is good to know then. Yeah I will like to see an FP response on how to do this better since it seems that we need a serious vacuum system in order to keep the oil going through the seals.

 

So has anyone on here changed back to the cylinder head oil feed with a restrictor like you would with a t3 based BB turbo to see if the oil issue goes away? Yes I know its not what they said to do, but just wondering if anyone has that and if the issue continues

 

It doesn't matter, there is a restrictor in the oil feed line on the FP BB turbos so the pressure can't be to high.
The issue has to come from either a clogged return or a ventilation issue which seems to be the most likely. Most people with the issue aren't running the OEM PCV setup.

 

post 22

 

Hello, I write from Spain and I have the same problem, but I see that is common, modifies the pcv system on my evo

http://forcedperformance.tumblr.com/...-is-coming-out

 

That link does a great job of explaining why this occurs.
Now, I just need to fix my ventilation setup....

 

In that writeup by FP, they mention one acceptable option is to run two huge hoses (and connectors) off the VC. They say that hooking one of the hoses to the intake pipe will pull a "vacuum" on the crankcase during boost, but I highly doubt that it would work. The issue is that the other hose is VTA, so there is no way to pull a vacuum on the crankcase. There will be minimal pressure in the crankcase, but I doubt it would be any lower than VTAing both big hoses, at least for the typical built motor.

 

I think the solution can be mounted electric oil pump on the return line, it is possible?

 

I believe what it said was he is using 2, -10AN lines from the VC and then another -10AN line to the air intake pipe. He doesn't specify if it is a sealed catch can but I would guess it is judging by the wording of the article. I am also assuming there aren't any valves being used......just the 2, -10AN to a sealed catch can and then the -10AN line to the air intake.
IT would be nice if he said anything about using any check or PCV valves.

 

This still does not explain why this only happens to the FP BB turbos. Why doesn't my JB turbo leak any oil with only running 2 -6an lines to a VTA catch can? I still think there is a sealing issue with the BB intake side of the turbo. If I had the money I would buy one and take it apart.