Parker Gen

Hi all, wondering if anyone can tell me if they are using a big single turbo on their 1JZGTE if they are using an oil restricter to their turbo? I am putting a Precision 6765 .82 A/R into mine and interested in what others are doing about the oil flow. Even if you have a 2JZ any input would be good.

blk&blu*j

iTrader: (1)

Well in the past I ran a journal 6765 on my 1J no restrictor -4 braid for feed and -10 return.

DoomLight

iTrader: (3)

if you are running a ball bearing turbo. it neccessitates a restrictor with -4 supply. if you run journal bearing, then u run perferrably a dash 4 supply line to it with no restrictor.

SC300_704

iTrader: (5)

when i had the 60-1 journal bearing i did ran a oil restrictor at first but an owner of a shop told me not to b/c my turbo is starving for oil. a couple of days later the seals in the turbo blew. now on my t67 (also journal bearing), i'm using the oil restrictor b/c i don't want to risk its seal blowing to. i'm using the -4 oil line btw.

DoomLight

iTrader: (3)

If u run a restrictor on a journal bearing turbo, you are taking chances

1JZPWRD

iTrader: (59)

I am using a BW S366 on a 1jzgte. Using -3 feed and -10 return as the shop recommended

Parker Gen

Ok so more to work out. It is a JB turbo not BB. I know these require a good oil supply to keep a good layer of oil between the shaft and the turbo housing. Some people have seals blowing others do not

Does anyone know how much oil flow is running out of the 1JZ at certain RPMs?

I am looking at running only 14 PSI for a while. I do not think at those levels without a oil restrictor I would blow the seals. But than again it may well blow them, who knows.

How much PSI did you run without a restrictor and for how long? These -4 and -10 are they AN sizing or something for the oil lines?

I was thinking no restrictor because it requires the oil but every so on someone like below says their seals blew.

How long have you been using the T67 and how much PSI with the oil restrictor? On the old turbo that you ran no restrictor how many PSI were you running when it blew?

I know.

BB or JB?

SC300_704

iTrader: (5)

been running the T67 since last July no problems yet. w/ my restrictor it sees about 65 psi and w/o i see up to 90 psi @ WOT.

Parker Gen

And same question but this time how many PSI of air pressure were your running in the turbos with the different settings? How much when it blew and how much do you run now with oil restrictor.

SC300_704

iTrader: (5)

15 psi for both turbos.

Parker Gen

Oh that low and they blew. Interesting. I am guessing yours is a 2JZ? The oil PSI would probably be similar in the 1JZ.

blk&blu*j

iTrader: (1)

I ran non restricted on a journal 6765 for 3 yrs no issues and yes -4 and -10 are feed and drain lines of the AN type that was on my 1JZ.
My 2JZ with a Bullseye 74 mm is running a -4 non restricted feed and -10 return with 85+ psi at over 7k and I rev to 9500, with no issues.

Parker Gen

Hmm, I think I'll go non restricted. I wonder what the recommended limit is for the PT6765 JB on oil pressure?
Anyone know this, is it even published by Precision? Tried contacting Precision and customer service wise directly, they suck.

Why are you using -4 and -10 oil lines exactly? Is this recommended as well? I assume this is to regulate oil pressure maybe?

How much air pressure PSI have you been running on your JB 6765 1JZ for those 3 years?

blk&blu*j

iTrader: (1)

28-32psi making 6-625hp through a 5spd 154 and 264 BC cams I have since sold that car about 9 months ago, to a member on here.

Parker Gen

Cool, I appreciate the input from everyone, however in a JB turbo I am more convinced running non restricted oil is the best option. Especially since you were making 28+ PSI for 3 years with no problems non restricted, I am sitting only at 14 or so for now just to keep it streetable. If it can handle 28 PSI half of it should not see more oil pressure.

Since I am on the topic. What grade oil were you using on the 1JZ. Maybe that had something to do with the other guys turbo seals blowing ?