FA20 with GTX series turbo - what size oil restrictor? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

mhiscott · 05-13-2016, 08:57 PM

I'm in the midst of swapping my PTE 4854 out for a new Garrett GTX2871r. Is a .035 restrictor the one to use with the FA20?

From Garrett's site:

Oil pressure entering a ball-bearing turbocharger needs to be between 40 psi and 45 psi at the maximum engine operating speed. For many common passenger vehicle engines, this generally translates into a restrictor with a minimum of 0.040" diameter orifice upstream of the oil inlet on the turbocharger center section. Again, it is imperative that the restrictor be sized according to the oil pressure characteristics of the engine to which the turbo is attached. Always verify that the appropriate oil pressure is reaching the turbo.

I'm thinking this is what I'm after:

http://www.atpturbo.com/mm5/merchant...Category_Code=

Coheed · 05-14-2016, 08:36 PM

I used a .035 on my garretts without issues. Too much oil can leak past the seals and cause smoking.

mhiscott · 05-14-2016, 10:31 PM

Thanks! That's what I'll use.

handsomegirl · 05-18-2016, 03:21 AM

I'm about to run a GTX2867R on my 86. Should I be running the same oil restrictor?

Anyone have any idea how much oil pressure (PSI) while idle, cruise and full load from these fa20?

Spartarus · 05-18-2016, 10:43 AM

Quote:

Originally Posted by handsomegirl

I'm about to run a GTX2867R on my 86. Should I be running the same oil restrictor?

Anyone have any idea how much oil pressure (PSI) while idle, cruise and full load from these fa20?

Load does not affect oil pressure. RPM does.

Idle oil pressure is very low. Some people have reported 8 PSI or lower.

I see 16.

3000 RPM 60 PSI
6000 RPM 80 PSI
7500 RPM 70 PSI

I run 10-30 with a 34-row oil cooler and a journal bearing turbo. Street temps stabilize at 181*F and rise under "spirited" driving.

Never seen over 220 F.

Pressure drops as temp rises but never below 70 at the high end.

To the people on .035 restrictors... Garrett Specifies a minimum diameter of .040, .035 is too small. These engines do not make an over-abundance of oil pressure.

.040 or even .045 would be better. Too little oil can cause premature wear.

Remember, a GTX2867R at 14 PSI tops 100,000 RPM shaft speed before you hit 6000.

#maverick# · 05-18-2016, 01:05 PM

I run a .030 in my precision ball bearing turbo and havent had any issues

05-13-2016, 08:57 PM	#1
mhiscott Senior Member Join Date: Dec 2013 Drives: 2013 FRS Location: NL, Canada Posts: 179 Thanks: 35 Thanked 35 Times in 27 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	FA20 with GTX series turbo - what size oil restrictor? I'm in the midst of swapping my PTE 4854 out for a new Garrett GTX2871r. Is a .035 restrictor the one to use with the FA20? From Garrett's site: Oil pressure entering a ball-bearing turbocharger needs to be between 40 psi and 45 psi at the maximum engine operating speed. For many common passenger vehicle engines, this generally translates into a restrictor with a minimum of 0.040" diameter orifice upstream of the oil inlet on the turbocharger center section. Again, it is imperative that the restrictor be sized according to the oil pressure characteristics of the engine to which the turbo is attached. Always verify that the appropriate oil pressure is reaching the turbo. I'm thinking this is what I'm after: http://www.atpturbo.com/mm5/merchant...Category_Code=

05-18-2016, 01:05 PM	#6
#maverick# Senior Member Join Date: May 2014 Drives: 2006 Pontiac GP (SOLD), 2014 FR-S Location: Chicago Posts: 378 Thanks: 296 Thanked 145 Times in 113 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I run a .030 in my precision ball bearing turbo and havent had any issues __________________ "Project cars are like New Years Eve. Endless preparation, hype, a sleepless night of fun, followed promptly by massive headaches and regret." - Anonymous

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Series.Blue hub bore size	lugao	Wheels \| Tires \| Spacers \| Hub -- Sponsored by The Tire Rack	11	04-02-2015 10:51 AM
HID bulb size/type on Monogram series	chicagokid	Cosmetic Modification (Interior/Exterior/Lighting)	1	05-27-2014 12:20 AM
nj brand new fa20 turbo kit minus turbo 2500	kingkai23	NY / NJ / CT / PA	3	03-06-2014 06:41 PM
FA20 oil cap thread size?	tomato86	Cosmetic Modification (Interior/Exterior/Lighting)	3	01-28-2014 12:04 PM
Garrett Turbo Oil Restrictor Fitting Question	rb6freak	Forced Induction	2	01-07-2014 08:45 PM

05-14-2016, 08:36 PM	#2
Coheed Senior Member Join Date: Jun 2012 Drives: DGM BRZ Limited Location: Seattle Posts: 813 Thanks: 209 Thanked 225 Times in 157 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I used a .035 on my garretts without issues. Too much oil can leak past the seals and cause smoking.

05-14-2016, 10:31 PM	#3
mhiscott Senior Member Join Date: Dec 2013 Drives: 2013 FRS Location: NL, Canada Posts: 179 Thanks: 35 Thanked 35 Times in 27 Posts Mentioned: 6 Post(s) Tagged: 0 Thread(s)	Thanks! That's what I'll use.

05-18-2016, 03:21 AM	#4
handsomegirl Member Join Date: Apr 2013 Drives: Toyota GT86 2015 Black Aero Kit. Location: New Zealand Posts: 47 Thanks: 3 Thanked 5 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I'm about to run a GTX2867R on my 86. Should I be running the same oil restrictor? Anyone have any idea how much oil pressure (PSI) while idle, cruise and full load from these fa20?

User Name		Remember Me?
Password