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16g oil restrictor ofh

Janesfam

Proven Member
103
43
Jul 9, 2021
Milwaukie, Oregon
As I’m getting ready to finish up the 16g phase of my build, I’m reading a lot about needing a restrictor on the oil feed line to the turbo if I’m going from the filter housing. Nothing I have read gives a link or a size for any restrictor. My buddy is telling me to just remove the port and slap a 3/8bspt plug bolt and run a 1g feed line from the head.

this 16g phase should should only be on the car till after Xmas. And the fp green should be set up with the ofh port. So I guess what I’m asking is this.

what size restrictor should I use on the oil feed line running from the oil filter housing to the 16g turbo?

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Janesfam

Proven Member
103
43
Jul 9, 2021
Milwaukie, Oregon
I don't see anything in your profile on anything else you have done to the car, so first thing is.. do you still have the balance shafts on the car?
Not certain to be honest. The previous build thread is linked.

Not certain to be honest. The previous build thread is linked.
Was told they have been deleted
 

Dusty Landrum

Supporting VIP
473
412
Jul 15, 2019
Denver, Colorado
Ok, yeah if they have been removed then yeah you would have high oil pressure and would need the restrictor. That is unfortunately as much as I know really on it. I have no idea really on what size.
 

1990TSIAWDTALON

Moderator
9,141
4,970
Nov 14, 2013
Independence, Kansas
See this THREAD. It discusses what restrictors were being used. @JusMX141 , do you have any recommendations for this?
 

1990TSIAWDTALON

Moderator
9,141
4,970
Nov 14, 2013
Independence, Kansas
Thats what we are here for! :thumb:
 

1990TSIAWDTALON

Moderator
9,141
4,970
Nov 14, 2013
Independence, Kansas
I'll try. Does it matter where it goes?
@dsmp do you know where to pick up a restrictor that would work for this member?
 

Janesfam

Proven Member
103
43
Jul 9, 2021
Milwaukie, Oregon
I'll try. Does it matter where it goes?
@dsmp do you know where to pick up a restrictor that would work for this member?
I believe it goes direct on the turbo oil inlet and then the oil feed line bolts onto it. I’ve now read like five different posts on this topic and not a single one has a part number or a link or anything hahahahaha WTF!
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It’s like a 12mm 1.25 to the 4an feed line or something
 

1990TSIAWDTALON

Moderator
9,141
4,970
Nov 14, 2013
Independence, Kansas
Not that this is what you are going to do, but I have used lead shot in a fitting and then drilled the size I wanted for an orifice in it. I will be on a search for a fitting though.
 

NOSLO2PT0

Proven Member
2,688
241
Aug 31, 2002
Joliet, Illinois
You can use the Red FP filter/restrictor. It’s recommended for all their journal bearing turbos, which are MHI based.

 

Janesfam

Proven Member
103
43
Jul 9, 2021
Milwaukie, Oregon
You can use the Red FP filter/restrictor. It’s recommended for all their journal bearing turbos, which are MHI based.

Thanks man, I was doing some more research on the subject and talking to a friend and he is using these in the images below, he inline filter sounds like a fair option but if it clogs then the turbo could potentially burn out…

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95_gsx_2g

Supporting VIP
155
40
Apr 26, 2010
washington, Pennsylvania
Thanks man, I was doing some more research on the subject and talking to a friend and he is using these in the images below, he inline filter sounds like a fair option but if it clogs then the turbo could potentially burn out…

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When I ran my Mhi small and evo3 16g I used a restrictor at the turbo as well as it being restricted on the center section. Not sure on the exact size but its very small for a journal and was indectical to the inlet size. When I pulled them to upgrade they were in great condition with no shaft play. My 71 I ran full unrestricted but I think it was being over oiled at times being I got no balance shafts. If I were you I would contact Fp they helped me many times including to set up the oiling for my new Fp/Xona 78-64! I use the purple restrictor now and another .20 inverted flare on the turbo. I also had to use particular fittings and oil feed line with a 90° off it. My oil is now filtered 3 times before going through the turbo bearings which to me is extra insurance for your turbo!
 

1990TSIAWDTALON

Moderator
9,141
4,970
Nov 14, 2013
Independence, Kansas
When I upgrade to the fp green after Xmas I plan on making some calls to fp

Aren’t you worried about clogging the filters and burning out the turbo?
I always run a turbo filter and come off the filtered port also.
 

steve

DSM Wiseman
14,472
1,401
Feb 3, 2002
St. Charles, Illinois
FP told me to feed the EVO3 16G with their AN-4 line from the OFH. It been running that way for more years than I can remember now.

IIRC it was the BB Turbos at the time than needed flow restriction to survive. Did I misunderstand or misremember?
 
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