I had put a green JB and worked perfect,but change to red BB and have problems

 

See? definitely will like FP to comment about this there is no coincidence that all of us have the same issue

 

i want to contact them and see what they say

 

They will tell you the same thing that article says and I said..... I have spoken to them.

The journal bearing turbo has a different design.... We'll it iisn't much different but where the bearings are in a BB turbo there is a journal on JB turbos. That journal gets lost of oil so it will lubricate the shift, like your cams in their journals. A BB turbo has bearings and is designed to flow much less oil through there, just enough to flow over everything. If there is to much oil there for whatever reason, it will get past those gas seals whereas a JB turbo needs a lot of oil and seals at a different spot to keep the oil in the cartridge.
So, like the article states, if there is to much oil for whatever reason it will defeat the gas seals and cause the problem. The causes could be blockage in the drain or inadequate ventilation. The way FP explained it to me is that the suction of the line going to the air intake pipe with a sealed system helps at idle and then the vents and PCV allow for the high RPM venting. My car was leaking at idle and my drain wasn't clogged so it makes a lot of sense to me especially after reading that article.
I wish they would diagram the whole system so we could see what valves they are implementing and how they are setup.

 

I think it may be the solution

http://www.rbracing-rsr.com/oilsystems.htm

 

Does anyone with another brand turbo have this issue with the BB turbos? I have not heard of a precision or garrett DBB turbo leaking into the compressor housing.

 

Yes Garretts leak into the housing if the restrictor isn't used.

 

Yeah if isn't used but in this case the oil line comes with the restrictor already on it so they either need to make it smaller or fix this **** cause this is the most expensive stock frame turbo and have this bull$&*t going on is not cool

 

+1

This is why I will be rebuilding my FP when the time comes. I do not want to change to the DBB only to have it leak afterwards.

 

Actually, it might not be the most expensive but it costs a lot.

I emailed FP and asked if the could respond and give us a detailed description of Robert's vetilation/PCV setup so hopefully they will post here and give some insight.

 

I have a hard time believing that crank case pressure (whatever it may be 1-2psi) is causing oil to leak through the housing and into the compressor housing. I'm curious if they saw this in their testing.

Also, on their website, they are feeding the turbo off of the head.

 

I am with you there. I guess that the head oil feed would be less pressure....anyone know for sure?
I am buying a CBRD BBK-BB-B turbo and they always use the head as the feed and suggested I do the same. Chad said they haven't had a failure with a BB turbo and they don't get any oil in the compressor housing.


It states that if the gas rings are submersed in oil that oil will seep through. This means to me that it would need very little pressure, much less than 1psi to bypass the gas rings if oil can seep past them. I am thinking maybe the problem is that there is to much oil there. If there is, it could only be caused by one of 2 things. Either the restrictor lets a bit to much through or the drain just isn't designed to handle the amount of oil that is there.
The only way I can see a crankcase ventilation issue is if crankcase pressure is causing the oil to back up into the oil drain thus submersing the gas seals and causing our issue.
Thoughts?


Hopefully FP will chime in ......

 

If you've basically got to redesign the whole crankcase ventilation system for your car to stop this then I think that FP need to have a good hard look at their BB turbo design. I'm running dual Saikou Michi catch cans, one on the PCV line between the valve and the intake and one on the crankcase line between the crankcase and the intake pipe. I have the turbo piped has suggested by FP, oil supplied via their hose (including the little inline filter) setup from the oil filter housing.

If this setup is not adequate to stop oil leaking from the turbo then I suggest another turbo brand maybe a better bet. Forced Performance has been conspicuous by their absence in this matter and I would have hoped that a thread that is now over 3 weeks old with 73 posts might have warranted a reply.

 

Thank you everyone for making this thread a good solution source of this problem. I am not happy i paid this much for a leaky turbo, regardless of how my pcv is vta or recirc. I bought mine brand new from fp and feel that this issue is nonsense. Not trying to be an fp hater bc the turbo boosts great, makes great power, and is beautiful piece of art. But this whole leaky oil issue is an eye sore and a laughing stock when i show people my car. Im not happy at all about my purchase, and am wishing that i did not buy an fp but would have rather went with another choice.

Let me spend 2500 bucks so people can point and laugh.

Wonderful.

 

This is a good thread. Thanks OP. I think I'll stick with CBRD or try to find a JB FP turbo.