North American Turbocoupe Organization



oil flow restriction to the turbo?
matt f Offline
Member
#1
I vaguely remember hearing that there is a restrictor built in to the turbo to keep oil flowing at a reduced volume.

I've got a new (to me) turbo and want to make sure it's there.

Where would I look, or did i hear incorrectly?
Ricky Bobby's Laughing Clown Malt Liquor" 88 Turbo Coupe'
2010 LeMons: 21st @ Capitol Offense, 17th @ Detroit Bull Oil Grand Prix.
Up in flames NJMP 2011
It's heart will beat again in an 87 Mustang!
2- 87 TCs, 1 88 TC, future race and support vehicles
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Dan S Offline
Administrator
#2
Which turbo did you acquire?
Dan S
Custom 88 TC, Mandarin Copper Pearl Metallic
http://natomessageboard.com/ubbthreads.p...5#comments
1972 Ford F-100 SWB Styleside
2015 Lincoln MKC 2.3 EcoBoost AWD
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matt f Offline
Member
#3
IHI
Ricky Bobby's Laughing Clown Malt Liquor" 88 Turbo Coupe'
2010 LeMons: 21st @ Capitol Offense, 17th @ Detroit Bull Oil Grand Prix.
Up in flames NJMP 2011
It's heart will beat again in an 87 Mustang!
2- 87 TCs, 1 88 TC, future race and support vehicles
Reply

Jeff K Offline
Administrator
#4
The only "restrictors" in a sleeve bearing turbo are the extremely small feed holes in the bearing sleeves. Ball bearing turbos often need an external restrictor, as the ball bearings dont need that much oil. If your oil pressure is real high for some reason, like 80+ psi, a sleeve bearing turbo can benefit from an external flow restrictor.
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
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matt f Offline
Member
#5
Excellent news, thanks!
Ricky Bobby's Laughing Clown Malt Liquor" 88 Turbo Coupe'
2010 LeMons: 21st @ Capitol Offense, 17th @ Detroit Bull Oil Grand Prix.
Up in flames NJMP 2011
It's heart will beat again in an 87 Mustang!
2- 87 TCs, 1 88 TC, future race and support vehicles
Reply

Dan S Offline
Administrator
#6
+1 with Jeff. Ball bearing turbos need the restrictor, journal bearings do not. The exception as Jeff said, is with high oil pressure.
Dan S
Custom 88 TC, Mandarin Copper Pearl Metallic
http://natomessageboard.com/ubbthreads.p...5#comments
1972 Ford F-100 SWB Styleside
2015 Lincoln MKC 2.3 EcoBoost AWD
Reply





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