Oil Restrictor On A Garrrett Gt3582r

[JonTurpening]

Just wanted to know if anyone here is running a gt3582r on their rb25det? If so are you running an oil restrictor? I bought a gt3582r a few weeks ago and installed an oil restrictor in line and now the turbo is shot! I didn’t even put 100 miles on it! I’ve installed many Garrett turbochargers on other cars but none on an rb25det. I’ve ALWAYS used the oil restrictors to lower the oil pressure for the gt bb turbochargers.

I talked to the shop I got it from and he tells me that I should not have used an oil restrictor on it. Any information would be great!

Thanks!

[nissan200sx.dk]

what size restrictor?

[Simon-S14]

garrets have restrictors built in

[JonTurpening]

Here is a link th where I got the restrictor. It's a .035"

http://www.atpturbo.com/Merchant2/merchant...tegory_Code=GRT

They are one of the biggest garrett dealers in the states and the told me to use it. I just wanted to know what you guys used if you used any.

[bubba]

Interested to know conclusively what to use here, have a GT35R sitting at home waiting to go on and don't fancy blowing it up!

[R31Nismoid]

My GT30 had a restrictor on the cartridge itself.

Seeing as though a GT35 uses the same one... i think you might find it already has one.

Either that or your motor didnt have enough oil pressure, or lines were blocked.

Many possibilities

[Simon-S14]

No - GT3076's don't [and others as well I'm pretty sure], I used the restrictor banjo bolt that goes into the block.

your wrong, the 3076's and many other GT30 series do run an internal restrictor

[GeeTR]

Juicy topic.

I too thought most of the GT3X range had ones built into the core.

Conclusive A: would be nice

[tridentt150v]

If its built in then its not visible..........looked like a normal say 3mm hole to me at the feed. What size is the built in one?

[Simon-S14]

tis smaller then thr stock nissan banjoi oil feed restrictor. so about 1 mm or so

[R31Nismoid]

If its built in then its not visible.

Nope it isnt.

Its inbuilt internally on the cartridge itself.

[dangerman4]

I was the first on SAU to grab the new gt3582r-iw when they were first released back 12 months ago.

im running a restrictor in the stainless fitting where my oil supply screws onto the block.

i used it on my old gt3071 and im using it on this.

gcg say its a must to keep oil pressure to under 45psi thru the core and as im running a n1 oil pump the restrictor was a must.

both turbo's worked perfectly with no issues, and they were / are daily driven and boosted.

[bubba]

Interesting, I'm running an N1 pump too - will pay attention to this thread and make some enquiries of my own, cheers dangerman

[nissan200sx.dk]

I use the same size restrictor as that. Made my own from ATP´s size.

Has worked very well.

My oil supply is not from the block though, its from the oil filter sandwhich plate.

Here is a link th where I got the restrictor. It's a .035"

http://www.atpturbo.com/Merchant2/merchant...tegory_Code=GRT

They are one of the biggest garrett dealers in the states and the told me to use it. I just wanted to know what you guys used if you used any.

[JonTurpening]

All new ss lines on the turbo. -10 return with atp's -10 an fitting. I checked the oil pressure from the feed line and it's 25 psi at idle and goes to 100 when you give it gas. I also have an oil pressure gauge on the motor and it has always read good. I've only put about 100 miles on this turbo. It was the first turbo on the motor since I put it in the car. The motor was flushed when I put the head gasket on so I know there was no trash in it. I only use royal purple in the motor.

The shop I bought the turbo from is telling me it went out due to me running a restrictor. I've talked to ATP and they told me that they run the restrictor in 100% of all the cars they put a gt3582r on. They told me that the gt3582r does have a built in restrictor in the turbo but that they always run their restrictor also. He also told me that it's hard to oil starve a gt turbo. He told me as long as it was getting any oil into it it would run fine!

I guess I'm gonna be on the phone with Dynoformance to try and see what I can get done! I just hate to think I just blew a $1300 usd turbo cause of a $5 restrictor!

Edited January 8, 2008 by JonTurpening

[Cubes]

GT30/GT35 same core different wheels. Both have built in restrictors.

I run a GT3076 with a similar setup as Dangerman4.

I used the factory restrictor from the banjo bolt; utilized the banjo and had new bundy tube soldered to it that then runs to the turbo and the required 7/16" inverted flare.

I've had mine in for quite a few months, clocked up quite a few km's with no issues.

Look at the condition of the bottom end or possibly any swarf left over in the oil feed line.

If the bottom end is on its last legs but not yet knocking or tapping those hydraulic lifters the turbo may very well let go as the bottom end will be bleeding off quite a bit of oil as a result starving the turbo.

It was the first turbo on the motor since I put it in the car.

Chances are there was a bit of crap floating around in the motor as it may have not been cleaned thoroughly.

A little gunk dislodged and reduced flow to the turbo.

Did you do the suggested oil drop and filter change after the initial start up and then another oil drop and filter change after 100km's?

[JonTurpening]

Yep. I changed the oil 3 times! I went so far as cutting the filters open and looking at them to see if there was anything in them. Clean as can be. I also always prim the line before I install it onto the turbo to make sure it is getting oil.

I'm not a new car guy. I'm an ASE certified master tech and have owned my own shop for about 6 years. I’ve done everything from 350z full forced induction builds to 4g63 drag set ups.

It's just I was thinking that there might be something I've over looked as I'm not familiar with the rb25det. My motto is and always will be that first and foremost, nobody knows everything and secondly if they say they do and are not willing to learn then they aren’t worth listening to! So that’s why I’m here. From what I’ve seen and from the dealing’s I’ve had with the car guys in Australia you are a straight up bunch! Sad to say way more so then most here in the states!

At this point, I’m going to pull the turbo and send it to Garrett and see what they say. I’ve just never seen a gt fail like this. I would hate to put another one on and not have figured out what the problem was!

GT30/GT35 same core different wheels. Both have built in restrictors.

I run a GT3076 with a similar setup as Dangerman4.

I used the factory restrictor from the banjo bolt; utilized the banjo and had new bundy tube soldered to it that then runs to the turbo and the required 7/16" inverted flare.

I've had mine in for quite a few months, clocked up quite a few km's with no issues.

Look at the condition of the bottom end or possibly any swarf left over in the oil feed line.

If the bottom end is on its last legs but not yet knocking or tapping those hydraulic lifters the turbo may very well let go as the bottom end will be bleeding off quite a bit of oil as a result starving the turbo.

Chances are there was a bit of crap floating around in the motor as it may have not been cleaned thoroughly.

A little gunk dislodged and reduced flow to the turbo.

Did you do the suggested oil drop and filter change after the initial start up and then another oil drop and filter change after 100km's?

[Cubes]

Ahh good stuff.

After the initial start up of the RB30DET I was a little horrified as to a few little bits that landed in the oil filter. I too cut it open.

It sounds like you have done everything right; do update the thread as to how you went with garrett.

There was a thread over on calaisturbo.com with a few complaining of failed GT35r's with no good reason.

[JonTurpening]

This is an email directly from Garret tech support

FAQ: Does my turbo require an oil restrictor?

Oil requirements depend on the turbo's bearing system type. Garrett has two types of bearing systems; traditional journal bearing; and ball bearing.

The journal bearing system in a turbo functions very similarly to the rod or crank bearings in an engine. These bearings require enough oil pressure to keep the components separated by a hydrodynamic film. If the oil pressure is too low, the metal components will come in contact causing premature wear and ultimately failure. If the oil pressure is too high, leakage may occur from the turbocharger seals. With that as background, an oil restrictor is generally not needed for a journal-bearing turbocharger except for those applications with oil-pressure-induced seal leakage. Remember to address all other potential causes of leakage first (e.g., inadequate/improper oil drain out of the turbocharger, excessive crankcase pressure, turbocharger past its useful service life, etc.) and use a restrictor as a last resort. Garrett distributors can tell you the recommended range of acceptable oil pressures for your particular turbo. Restrictor size will always depend on how much oil pressure your engine is generating-there is no single restrictor size suited for all engines.

Ball-bearing turbochargers can benefit from the addition of an oil restrictor, as most engines deliver more pressure than a ball bearing turbo requires. The benefit is seen in improved boost response due to less windage of oil in the bearing. In addition, lower oil flow further reduces the risk of oil leakage compared to journal-bearing turbochargers. 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.

The use of an oil restrictor can (but not always) help ensure that you have the proper oil flow/pressure entering the turbocharger, as well as extract the maximum performance.

I am sending my turbo back to the distributor so that he can look at it and at my restrictor. I'm keeping my fingers crossed!!

[SimonR32]

my t04z had a "inbuilt" restrictor in it and we added another smaller one...

this is on a rb26 with decent oil pressure though, on rb25 the standard restrictor should be enough