Oil restrictors on a C5 APS TT setup?
01-24-2012, 09:39 PM
#2
Le Mans Master
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St. Jude Donor '08
Technically, you aren't supposed to run restrictors with journal bearing turbos as the the bearings actually act as the restrictors. When I bought my kit, the previous owner did have restrictors in it, but it was because it was smoking and the APS scavenge pump couldn't keep up.
I'm anxious to know who does run restrictors, though.
I'm anxious to know who does run restrictors, though.
01-24-2012, 09:55 PM
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I have the LG upgraded cold sides and it was fine at 14.5 psi. Bumped it to 16psi and now it's smoking when I lift. No blow by and good vacuum on the motor. I already have a big return pump on the return. At idle it's pumping a full stream of oil back into the valve cover.
Remo
Remo
01-25-2012, 01:50 PM
#4
Burning Brakes
No restrictors here with no smoking but I am only running 11.5 lbs boost.
Maybe I am missing the point but I would think oil pressure and flow would be more RPM related than boost related. The higher boost is coming from the wastegates and should still have the same oil flow/pressure through the turbos as same given RPM regardless of boost level. The turbos may be spinning faster at higher boost but I dont see how restricting oil flow would help.
Maybe I am missing the point but I would think oil pressure and flow would be more RPM related than boost related. The higher boost is coming from the wastegates and should still have the same oil flow/pressure through the turbos as same given RPM regardless of boost level. The turbos may be spinning faster at higher boost but I dont see how restricting oil flow would help.
01-26-2012, 07:55 AM
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Technically, you aren't supposed to run restrictors with journal bearing turbos as the the bearings actually act as the restrictors. When I bought my kit, the previous owner did have restrictors in it, but it was because it was smoking and the APS scavenge pump couldn't keep up.
I'm anxious to know who does run restrictors, though.
I'm anxious to know who does run restrictors, though.
Rob.
01-26-2012, 07:59 AM
#8
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Thanks for the reply. Here is a video of what's going on.
http://s120.photobucket.com/albums/o...t=ernie123.mp4
Remo
http://s120.photobucket.com/albums/o...t=ernie123.mp4
Remo
01-26-2012, 08:55 AM
#9
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St. Jude Donor '08
TTI restricts both journal and bearing turbos which does decrease life of turbos according to turbonetics and precision. We correct this problem by either removing restrictors and run a scavenging pump or enlarging the restrictors, problem with removing restrictors without pump you may have smoking issues going up and down steep hills.
Rob.
Rob.
What size restrictors do you guys use? I have upgraded APS turbos with better thrust bearings and have been told that they can't get too much oil, but I run -4 unrestricted line to each turbo.
