eBay knockoff GT35R testing.

[mikelv]

What did your buddy do with the gt13? Strange but I have a collection of blown dsm turbos and that would make a nice addition

Man I got a laugh with that one my friend. That's not strange, it's just spoken like a true DSM'er.

 

[tkelly27]

Is it anything like this?
Some info on gt45 y2004k china turbo.(new pics)

Have you pulled it completely apart? They allude to metal shavings being inside the cartridge. It might also be useful to know what kind of bearings they use. Maybe as a precautionary measure to change them to real garrett ones. Putting makeup on a pig doesn't make it pretty, but you can certainly wash it so it doesn't smell bad...

It seems like really high boost kills these turbos, any thoughts on that? There's one guy who has been running the GT35 variant for years on his truck at low boost. On a big V8 low boost is still 500-600hp though. I'm not versed enough in turbo operation to know how boost level affects loading and bearing life, but I'm thinking that might be the difference between life and death for the ebay guys. Just a thought...

 

[JusMX141]

It might also be useful to know what kind of bearings they use. Maybe as a precautionary measure to change them to real garrett ones. Putting makeup on a pig doesn't make it pretty, but you can certainly wash it so it doesn't smell bad...

I've been installing Genuine Garrett Bronze journal bearings in knockoff turbos for quite a while.

Please be advised that the GT35R in question is a ball bearing turbo; ball bearing turbos cannot be properly disassembled and serviced as a journal bearing turbo can.

 

[90laserRSfwd]

results?

 

[tkelly27]

Haha, asking for results isn't going to make them come any faster.

Oh yeah, you're the guy that I first read about putting real bearings into knock off turbos. My bad! Not any kind of sarcasm, thanks for investigating these things. I did miss the part where it actually had ball bearings. I've heard so many stories of people getting journal bearings when ordering ball bearings from ebay I just assumed they didn't exist.

 

[JusMX141]

results?

He has everything but the manifold, which is now on it's way (Turbonetics cast.) Should be making boost in time for the Shootout.

He's already bought an oil drain, oil feed, inline filter, fabbed his own o2 housing, and the newest addition is a set of 9.0:1 Wiseco's, Eagle Rods, and an MLS gasket. He wants to run 28-30 psi on race fuel.

 

[babyviper]

Hate to be a dick but a buddy of mine has that turbo and it is journal bearing as hell. If you ever held a ball-bearing turbo and spun it, it will not stop for quite a while with a good spin. The turbo you have sir will not do that give it a try and find out. The reason I am telling you this is so you should feed that turbo from the oil filter housing and if you oil pressure goes above 65psi any any spot in the rpm you need to install a restrictor made for journal bearing turbos not ballbearing turbos which can be found here.
Oil Inlet Restrictor - .065" hole size 1/8" NPT (for Journal bearing and larger GT BB): atpturbo.com

 

[JusMX141]

It's possible your buddy's turbo wasn't, however the listing for the turbo my friend purchased clearly states that it is "DUAL BALL BEARING" while some of the listings for turbos that were labeled as "GT35" clearly stated they were a journal-bearing turbo.

This turbo's freewheeling characteristic is unlike any journal-bearing turbo I've seen....a quick spin with your fingers and the turbo will freewheel about 10-12 seconds, almost as if the shaft is frictionless and riding on some type of ball bearing.

 

[Slippi84]

Forget that whole spinning bs anyway My hx40 spins more free than mt GT14 from SBR did(Dual ball bearing).

 

[talon187]

20-30psi on race fuel thats cool. is the car going to be just driven on the track or street to? if its going on the street any idea how much boost on pump?

 

[Afroclipse]

This turbo's freewheeling characteristic is unlike any journal-bearing turbo I've seen....a quick spin with your fingers and the turbo will freewheel about 10-12 seconds, almost as if the shaft is frictionless and riding on some type of ball bearing. Weird.

Thats effed up

 

[dsm-onster]

Forget that whole spinning bs anyway My hx40 spins more free than mt GT14 from SBR did(Dual ball bearing).

I think Jusmx141 knows what he's talking about and has proven himself as a reputable turbo rebuiilder. With that said, he knows what bearing style the turbo has considering it is in his hands. And his determination that this turbo has a true BB centersection is pretty much what anyone should believe.

But I will add that my holset h1c freewheels for 20 or so seconds after I spin it by had too. It must be just a holset thing. Because my t-netics 60-1 didn't do this, nor my small 16g. Nor have the garrett gn and turboford turbos I've handled had that characteristic. They would all stop spinning 5-7 seconds later. Well broken in and not blown.

 

[Boosted98gsx]

Wonder how these would hold up to being made into a turbine jet....

 

[Slippi84]

I think Jusmx141 knows what he's talking about and has proven himself as a reputable turbo rebuiilder. With that said, he knows what bearing style the turbo has considering it is in his hands. And his determination that this turbo has a true BB centersection is pretty much what anyone should believe.

But I will add that my holset h1c freewheels for 20 or so seconds after I spin it by had too. It must be just a holset thing. Because my t-netics 60-1 didn't do this, nor my small 16g. Nor have the garrett gn and turboford turbos I've handled had that characteristic. They would all stop spinning 5-7 seconds later. Well broken in and not blown.

I know he's reputable I was making a statemnetg not directly toward him but at the whole how long it spins as a refference to it's center make up. Maybe it is a holset thing but I have had enough tubros to know there are a bunch of things that factor into how long it spins. If it's been run before and oil has had oil run threw it shaft play will make it sin less too it's all relative. But I don't doubt for a second this is a ball bearing tubo. Besides coppying a turbo's specs and making it journal bearing would take too much R&D vs just coying it directly for a knock off ebay company j/k

 

[rrussell]

Thanks for this thread.

Can't wait for the results!!!

 

[The_EE]

I think Jusmx141 knows what he's talking about and has proven himself as a reputable turbo rebuiilder. With that said, he knows what bearing style the turbo has considering it is in his hands. And his determination that this turbo has a true BB centersection is pretty much what anyone should believe.

But I will add that my holset h1c freewheels for 20 or so seconds after I spin it by had too. It must be just a holset thing. Because my t-netics 60-1 didn't do this, nor my small 16g. Nor have the garrett gn and turboford turbos I've handled had that characteristic. They would all stop spinning 5-7 seconds later. Well broken in and not blown.

My journal bearing Mitsu tdo6h-20g spins for at least 10-15 seconds with a good hand spin. I can turn off the car and hear the thing spinning after popping the hood. Cant wait to hear the 35r coming in the next couple days

 

[1fastlaser]

jumping in, wanna see some results

 

[JusMX141]

I honestly think the enormous backplate size of the compressor wheel and the large turbine inducer are what makes a Holset freewheel for a while more than, say, a Small 16G. There's more rotating mass.

Also, you have to remember that all turbos will freewheel longer when installed on a car- especially if the car has been recently run. If you pull your intake and give the wheel a spin, just about any turbo will freewheel for quite a while because of the oil that remains in the supply line and the cartridge.

On the bench, however, I've found this to be completely different. After a journal bearing turbo sits a few days with the oil line removed, the oil will drain out of the journals causing friction between the bearings and the shaft, where a ball bearing turbo will continue to spin freely.

 

[JusMX141]

I'm getting more and more curious by the minute as to how this thing's gonna hold up.

We're still waiting on the manifold. The supplier is dragging their feet and holding up the whole works. I looked back and the manifold was invoiced July 16th and it's STILL not here yet. I have a SFP Tubular manifold here that's in nice shape and could be used, but he's insisting that he wants a cast manifold. The SFP would require the use of a 40mm wastegate instead of his Tial 38mm gate, so we're hoping the cast mani makes it here soon.

 

[rrussell]

If this turbo works and holds up, I'm all about doing this turbo with a cheap ebay manifold also.

 

[JusMX141]

Haha I'm thinking the same for my ongoing black AWD project! I've always wanted a GT30R/GT35R variant but the fact that they cannot be rebuilt is what kept be from seriously considering one. Being that this turbo is more affordable than an MHI 16G, I won't feel so bad if something in the oil could cause it to prematurely fail.

 

[Boosted98gsx]

No, a garrett DBB core cannot be rebuilt, but garrett has a warranty buyback policy for the CHRA if it fails due to its bearings.

 

[JusMX141]

TurboByGarrett.com - BB Service

I realize this, but by the time a $1300-$1500 Garrett GT35R dies and you pay the $400 Garrett replacement charge to get a new one, you're now out $1700-$1900.

If this $385 monster pans out, I could throw away (4) of them for what I'd have wrapped up in a damaged Garrett.

 

[talon187]

yeah thats why im instrested myself. hey just did you see my other post i was wondering if the car was going to be on the street as well as track and how much boost for pump gas thanks! o yeah where did he get the exhaust manifold from and how much was it?

 

[TimG]

TurboByGarrett.com - BB Service

I realize this, but by the time a $1300-$1500 Garrett GT35R dies and you pay the $400 Garrett replacement charge to get a new one, you're now out $1700-$1900.

If this $385 monster pans out, I could throw away (4) of them for what I'd have wrapped up in a damaged Garrett.

4 of them and the equivalent to a month of downtime.