In case anyone cares about emotorsusa.com china GT2870 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 02-12-2010, 10:12 PM   #1
Elite Member
Thread Starter
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default In case anyone cares about emotorsusa.com china GT2870

Claimed Turbo specs:

Ideal for smaller displacement engines making up to 420hp
Compressor Wheel
0.60 A/R Cold Side
Ind: 54.00 mm
Exd: 70 mm
Trim: 60
Turbiner Wheel
.64 A/R
Garrett 4 Bolt T25 Flange
Ind: 52.90 mm
Exd: 45.47 mm

Rough estimate actual turbo specs measured with crappy plastic caliper:

Compressor
Ind53.1mm
Exd 69.7mm

exhaust
Ind 51.7mm
Exd 45.7mm

I have no idea what this means, but I guess it means it is close to a 2870 as claimed. Good Times!

miatauser884 is offline   Reply With Quote
Old 02-12-2010, 10:22 PM   #2
Junior Member
 
Join Date: Jun 2007
Location: Lenexa, KS
Posts: 129
Total Cats: 0
Default

That's damn near the exact specs as mine.
crnrhrd is offline   Reply With Quote
Old 02-12-2010, 11:32 PM   #3
Newb
 
Join Date: Dec 2008
Location: Orlando, FL
Posts: 19
Total Cats: 0
Default

I've been eyeballing that turbo on ebay.
I'm running roughly the same turbo you are now (journal 2554).
Curious to hear how this turbo compares. Please keeps us posted!
RCraig is offline   Reply With Quote
Old 03-12-2010, 09:13 AM   #4
Newb
 
Join Date: Mar 2010
Posts: 1
Total Cats: 0
Default

I just picked up this turbo as well. is yours the ball bearing or journal bearing version?

and if it is a journal bearing one did it come out of the box with shaft play?

I wrote back to the seller about my disappointment with the shaft play in mine and they responded that since it is journal bearing it comes new with some shaft play.

cheap turbo delivered already broken?
mycroftxxx is offline   Reply With Quote
Old 03-12-2010, 09:27 AM   #5
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,838
Total Cats: 1,787
Default

there's always a little shaft play on the wheel, but the shaft should not be able to move in and out at all...
Braineack is offline   Reply With Quote
Old 03-12-2010, 10:14 AM   #6
Elite Member
Thread Starter
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Quote:
Originally Posted by mycroftxxx View Post
I just picked up this turbo as well. is yours the ball bearing or journal bearing version?

and if it is a journal bearing one did it come out of the box with shaft play?

I wrote back to the seller about my disappointment with the shaft play in mine and they responded that since it is journal bearing it comes new with some shaft play.

cheap turbo delivered already broken?
Mine came with a little radial shaft play (journal bearing) You have to press pretty firmly to get it to move. It made sense that the play will subside when oil fills the turbo. I'm not sure of the fluid properties of oil, but I'm sure it's not very compressable. Which would mean that when it fills the air voids under pressure it will act like a viscous solid.

It had NO in/out shaft play. EmotorsUSA has a 1yr (full relacement) warranty, which is better than most china turbo manufacturers. Of course, if ir fails and nukes your motor then :(

Last edited by miatauser884; 03-12-2010 at 10:53 AM.
miatauser884 is offline   Reply With Quote
Old 03-12-2010, 10:30 AM   #7
Tour de Franzia
iTrader: (6)
 
hustler's Avatar
 
Join Date: Jun 2006
Location: Republic of Dallas
Posts: 29,114
Total Cats: 351
Default

Quote:
Originally Posted by djp0623 View Post
It had NO in out shaft play. EmotorsUSA has a 1yr (full relacement) warranty, which is better than most china turbo manufacturers. Of course, if ir fails and nukes your motor then :(
Good luck getting a warranty claim paid, even with the advertised warranty.
hustler is offline   Reply With Quote
Old 03-12-2010, 10:33 AM   #8
Elite Member
Thread Starter
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Actually, I think levnubin had to use it, and they sent him a new one. I may be mistaken, so you may want to ask him directly.
miatauser884 is offline   Reply With Quote
Old 03-12-2010, 10:48 AM   #9
Elite Member
 
Join Date: Dec 2008
Location: Colorado
Posts: 1,669
Total Cats: 36
Default

Quote:
Originally Posted by djp0623 View Post
Mine came with a little axial shaft play (journal bearing) You have to press pretty firmly to get it to move. It made sense that the play will subside when oil fills the turbo. I'm not sure of the fluid properties of oil, but I'm sure it's not very compressable. Which would mean that when it fills the air voids under pressure it will act like a viscous solid.

It had NO in out shaft play. EmotorsUSA has a 1yr (full relacement) warranty, which is better than most china turbo manufacturers. Of course, if ir fails and nukes your motor then :(
As I understand it, axial play means in-out, radial play means side-side.

Axial is bad, but a tiny bit on a unit with 0 oil does make sense. A bit of radial play is OK and more or less normal.
Sparetire is offline   Reply With Quote
Old 03-12-2010, 10:52 AM   #10
Elite Member
Thread Starter
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Quote:
Originally Posted by Sparetire View Post
As I understand it, axial play means in-out, radial play means side-side.

Axial is bad, but a tiny bit on a unit with 0 oil does make sense. A bit of radial play is OK and more or less normal.
You are correct. I have been mis-using the axial term. Axial=in/out and radial = side to side.

I have zero axial play and slight radial play. I will edit my posts to minimize confusion
miatauser884 is offline   Reply With Quote
Old 03-12-2010, 03:37 PM   #11
Want fries with that?
iTrader: (3)
 
Join Date: Oct 2009
Location: Twin Cities, Minnesota
Posts: 2,023
Total Cats: -1
Default

I'm gonna be running the 2554 knockoff they carry, sitting in my storage room as we speak... Just need to finish transferring money so I can pay Brainy-ballz for a MS.
rider384 is offline   Reply With Quote
Old 03-12-2010, 03:52 PM   #12
Elite Member
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

Quote:
Originally Posted by djp0623 View Post
Actually, I think levnubin had to use it, and they sent him a new one. I may be mistaken, so you may want to ask him directly.
You are correct, after two weeks the first one developed a horrid bearing noise. They replaced it no questions asked.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
Old 03-12-2010, 04:41 PM   #13
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 406
Default

Quote:
Originally Posted by Braineack View Post
there's always a little shaft play
we're lucky to have you.


incidentally, I love my 2876. so if it is a tiny step down from that, it should be a baller setup.
y8s is offline   Reply With Quote
Old 03-12-2010, 09:57 PM   #14
Senior Member
 
Join Date: Dec 2004
Location: Brisbane, Australia
Posts: 1,272
Total Cats: 32
Default

How well does it spool on an 1800?
timk is offline   Reply With Quote
Old 03-12-2010, 10:12 PM   #15
Elite Member
Thread Starter
iTrader: (11)
 
Join Date: Feb 2009
Posts: 2,982
Total Cats: 10
Default

Quote:
Originally Posted by saboteur View Post
How well does it spool on an 1800?
I'd like to know as well. Mine is still sitting on that same paper plate on the dining room table.
miatauser884 is offline   Reply With Quote
Old 03-13-2010, 12:05 PM   #16
y8s
2 Props,3 Dildos,& 1 Cat
iTrader: (8)
 
y8s's Avatar
 
Join Date: Jun 2005
Location: Fake Virginia
Posts: 19,038
Total Cats: 406
Default

keep in mind this is a real deal garrett 2876 and is ball bearing, so i bet both of those are worth some improvements over the chinacharger.... oh and the VVT is working to improve things as well...

4th gear, 2001 with VVT enabled and run by the factory ECU (sorta):

y8s is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 57 07-19-2017 05:11 PM
My solution for Oiltemp and Oilpressure input into Megasuirt (MS3) Zaphod MEGAsquirt 41 01-24-2016 01:25 PM
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
3rd Time's a Charm...hopefully. zephyrusaurai Meet and Greet 2 09-28-2015 11:59 PM
WTB HPDE miata - Texas Voltwings Cars for sale/trade 0 09-27-2015 07:40 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 12:22 PM.