Ive searched quite a bit around the web. Full-race says they need restrictor pills on -4an and bigger.

When I bought my turbo I did not look at the paperwork, but some are saying it tells you to use -4an without restrictor.

Anyone have real info on what oil pressure these journal bearing BW s300 series are suppose to operate at?

 

I've never run them with a restrictor, using use a 4AN feed, -12An return, and stock FD OP. Just make sure you use a proper crankcase vent( -12AN open line).

 

Ditto. It's a journal bearing turbo.

 

10-4. I might have to redo me 10-an return to -12

 

-10 wil be fine too.

 

it would save me around 40$. I will try -10 considering i dont exactly make 3rd gen oil pressure. I used the racing beat 85 psi=/

 

We've ran every bw turbo under the sun will oil pressures from 75-130psi with -4 feeds and -10 returns without a single issue.

 

Boom!

 

Boom?

Just started using a S360 with -4 oil supply without a restrictor and -10 drain. So far so good with no smoking issues.

 

Journal turbos don't need restrictors, that's for ball bearing turbos which only need to see a mist of oil.

 

any update with regards to using or not using a oil restrictor ??

thanks

 

My S369 on a fd motor with a -4 line with no restrictors does smoke a little.I am looking into getting the oil flow restricted and see if it does stop.By the way is not the motor.My old turbonetics that i just removed it did not smoke and it had decent shaft play on it.

 

-12 an return line into stock drain location.

 

is everyone sure these turbos dont come with a restrictor built in?

 

No restrictor according 2 the BW tech guy.

 

Mine is a -4 with a .049 nitrous pill restrictor. Way bigger than any BB restrictor and the motor makes 90+PSI and pegs the FD gauge.

I just cut off the flared end of a NPT to -4 adapter and stuck the nitrous pill in there as it has the same 37* AN flare.

 

Well i did installed a restrictor in mine and no more oil smoke.

 

hey thanks for the update, would it be cool if you could provide a link to which restrictor you used

thanks in advanced.

 

You shouldn't need a restrictor unless you have a race pressure regulator or an issue causing excessively high oil pressure. I also run a -4 feed and -10 return. All modified turbo cars should have a properly vented catch can.

 

Is a FD motor on a FC with a vented catch can.The turbo was purchased a couple of months ago and since the first startup it seems 2 burn a little oil.

 

Whats your oil pressure like?

 

50 idle 110 when revving.

 

I have been running -4.an feed and 10an return. Without a restricted hasn't smoked since I originally posted. Never needed he 12an return.

 

110 is a little high but it shouldn't smoke. Make sure your crankcase is properly vented.

 

IR any particular way 2 vent my crankcase 2 help with the smoking?