Page 1 of 1
Garret Oil Feed Restrictionn Fitting GT28.
Posted: Sat Dec 12, 2009 1:54 pm
by Rhysta
Gday fellas,
Wanting to hear from others who are running a Garret GT28 and have installed it themselves.
Ive run my oil lines but am getting a high pitched squeal type sound higher in the rev range and under boost over about 5psi.
I was doing a bit of reading and noticed that Ball Bearing turbos require and oil restriction to keep the pressure below about 25psi or so.
Was just wondering who has installed them where did you get it?
I think my odd sound may be related to my pressure issues.
Just to eliminate a few things, turbo is brand new shaft play in and out is acceptable for a BB turbo, no signs of turbine contact on compressor housing or turbine housing.
Any pointers would be great
Cheers Rhys
Posted: Sat Dec 12, 2009 3:27 pm
by nayto
0.03 Oil Restriction Inlet Fitting Turbo Restrictor GT28/GT28RS/GT30R/GT35R
U can buy them, special fittings to suit, or just braze up the fitting an drill to the right size
Posted: Sat Dec 12, 2009 3:29 pm
by LUX90
The GT Garrett turbos have the oil restrictor built into the bearing housing.
What vehicle is it on, Are you 100% sure there are no boost leaks anywhere. I have heard some really strange noises made by boost leaks especially as boost went over a certain level.
Posted: Sat Dec 12, 2009 3:43 pm
by tim75b
you can also fit a grub screw with the correct size hole drilled trough the center in the oil inlet of the turbo it already has a thread cut i think it was 1.5mm hole through the grub screw but it was too long ago to be sure
Posted: Sat Dec 12, 2009 4:06 pm
by Rhysta
LUX90 wrote:The GT Garrett turbos have the oil restrictor built into the bearing housing.
What vehicle is it on, Are you 100% sure there are no boost leaks anywhere. I have heard some really strange noises made by boost leaks especially as boost went over a certain level.
Yeah well that was my next deduction as to what the sound could be.
I cant see anywhere that the GT series turbos have the restrictor built into them, I thought they had it built in to, but now ive seen the fitting available on the net ( in the states ) I was a little unsure.
Posted: Sat Dec 12, 2009 4:53 pm
by dogbreath_48
I don't run any restrictor on my GT2860RS - no apparent problems
Posted: Sat Dec 12, 2009 5:23 pm
by nastytroll
dogbreath_48 wrote:I don't run any restrictor on my GT2860RS - no apparent problems
The oriface on a gt garrett is in the bearing retainer. Some ball bearing turbo's don't have an internall restrictors.
Posted: Sat Dec 12, 2009 7:00 pm
by Rhysta
nastytroll wrote:dogbreath_48 wrote:I don't run any restrictor on my GT2860RS - no apparent problems
The oriface on a gt garrett is in the bearing retainer. Some ball bearing turbo's don't have an internall restrictors.
Well I figure, why would they be making them for these turbos if they had them built in? Think it might be a goer..
Rhys
Posted: Sun Dec 13, 2009 8:21 am
by nastytroll
Rhysta wrote:nastytroll wrote:dogbreath_48 wrote:I don't run any restrictor on my GT2860RS - no apparent problems
The orifice on a gt garrett is in the bearing retainer. Some ball bearing turbo's don't have an internal restrictor.
Well I figure, why would they be making them for these turbos if they had them built in? Think it might be a goer..
Rhys
fit the orifice closest to the turbo. If you fit it to the other end of the hose it could cause a slow oil feed on start up and damage the bearings.
Posted: Sun Dec 13, 2009 10:36 am
by Rhysta
Yeah I figured that.
Thanks for the help fellas, another great outers tech help out session
Just gotta sort the boost leak now
Thanks Rhys