Sr20 turbo specs!! - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 02-20-2009, 12:16 AM   #1
Hittin' Boost & Cones
Thread Starter
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default Sr20 turbo specs!!

Not sure if this is all on miataturbo.net in one nice post so here we go:

Finally found some good info on OEM sr20det turbos all in one place. Its stuff i have sorda known from the past through owning a 240 with a sr swap, but here it is ... all organized:

from 240atlanta.com
Quote:
the older turbos are all journal bearings, garett sells the newer ones for s13's that are ball bearings (gt2560r) the ball bearing is shown by the R in the name. garrett doesnt sell the old journal bearing turbos.
http://www.turbobygarrett.com/turbob...R_466541_1.htm

Redtop - Garrett gt2560
Journal bearings.
Compressor: T-25, 60 trim 56mm BCI-1 compressor.

Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.


Blacktop - Garrett gt2560

Compressor: T-25, 60 trim 56mm BCI-1 compressor.

Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.

Center Section: Journal bearings

The turbos are exactly the same except one is newer.


s14 sr20det
gt28/25 hybrid turbo
gt25 compressor side and gt28 turbine side.

Compressor: T-28, 60 trim 60 mm BCI-1 compressor in T-04B housing

Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.


s15 sr20det
gt2860rs

Compressor: T-28, 60 trim 60 mm BCI-1 compressor in T-04B housing

Turbine: Inconel turbine wheel. Cast divider wall between turbine discharge and wastegate.

http://www.turbobygarrett.com/turbob...S_739548_1.htm


rb26dett twins
http://www.turbobygarrett.com/turbob...R_707160_7.htm
these are the twin turbos... notice the compressor map has a reduced airflow compared to the s14 version of this. these turbos are almost identical except for the turbine and compressor wheels.
240_to_miata is offline   Reply With Quote
Old 02-20-2009, 02:30 AM   #2
Elite Member
iTrader: (7)
 
Join Date: Jan 2007
Location: Renton Washington
Posts: 1,742
Total Cats: 3
Default

file not found
SKMetalworks is offline   Reply With Quote
Old 02-20-2009, 03:38 AM   #3
Senior Member
iTrader: (2)
 
Join Date: May 2007
Location: Malibu, CA
Posts: 749
Total Cats: 0
Default

Something is wrong here. They call the S13 redtop and blacktop T25s gt2560's, but the 60 would signify a 60mm compressor wheel exducer diameter, so isn't that turbo actually a gt2556 because of the 56mm compressor? Or is there some wierd garrett naming thing going on there too?
speedf50 is offline   Reply With Quote
Old 02-20-2009, 03:49 AM   #4
Senior Member
iTrader: (2)
 
Join Date: May 2007
Location: Malibu, CA
Posts: 749
Total Cats: 0
Default

Also, can you have a T25 frame size for the compressor housing? From garrett's site it seems like the Txx always refers to a turbine frame size, and the size of the compressor is just expressed by the second two numbers.

I'm not trying to nit pick, I'm just trying to get my head around this turbo naming stuff too.

Also... they typoed saying the S14 turbo has T28 turbine... then saying that it has a T25 turbine, they need to make up their minds.
speedf50 is offline   Reply With Quote
Old 02-20-2009, 04:13 AM   #5
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,174
Total Cats: 2,575
Default

I'd take posted info with a grain of salt
18psi is offline   Reply With Quote
Old 02-20-2009, 08:14 AM   #6
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

Perhaps I posted this in the wrong section, therefore nobody saw it...but check this SR20 info out.
thirdgen is online now   Reply With Quote
Old 02-20-2009, 09:02 AM   #7
Hittin' Boost & Cones
Thread Starter
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

i would take some of the info with a grain of salt, yes. but whats important is the compressor trim and A/R for the different turbos. That info seems to be correct. As for the turbine stuff or the "garrett equivelent" ... who knows

i just thought it was better info than nothing and decided to share.
240_to_miata is offline   Reply With Quote
Old 02-20-2009, 02:58 PM   #8
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

https://www.miataturbo.net/forum/t31697/
forgot to post this in the previous response...check it out.
thirdgen is online now   Reply With Quote
Old 02-20-2009, 03:55 PM   #9
Elite Member
iTrader: (5)
 
Join Date: Apr 2007
Location: Wellford, SC
Posts: 1,704
Total Cats: 1
Default

Here's the info that I got from 240SX Forums, where I'm a moderator...

Quote:
Originally Posted by 240-kid
I have seen Many threads asking whats the spec's of the stock turbo's and what they are rated at so....

Note: The HP ratings are w/ Fully Stock Motors

S13 Red-Top T25:
Compressor: T-25, 60 trim 56mm 0.60 A/R BCI-1 compressor.
Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.
Stock Boost: 7 psi
Safe Boost: > 13-15 psi After that The Turbo is past it's efficiency
Max Boost: 17 psi
HP Ratings: 240 - 250 RWHP
Type of Bearings: Journal Bearing


S13 Black-Top T25:
Compressor: T-25, 60 trim 56mm 0.60 A/R BCI-1 compressor.
Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.
Stock Boost: 7 psi
Safe Boost: > 13-15 psi After that The Turbo is past it's efficiency
Max Boost: 17 psi
HP Ratings: 240 - 250 RWHP
Type of Bearings: Journal Bearing


S14 Zenki (1993-96) Black-Top T28:
Compressor: T-28, 60 trim 60 mm 0.60 A/R BCI-1 compressor in T-04B housing
Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.
Stock Boost: 7 psi
Safe Boost: > 13-15 psi After that The Turbo is past it's efficiency
Max Boost: 17 psi
HP Ratings: 250 - 260 RWHP
Type of Bearings: Journal Bering


S14 Kouki (1996-98) Black-Top T28:
Compressor: T-28, 60 trim 60 mm 0.60 A/R BCI-1 compressor in T-04B housing
Turbine: T-25, 62 trim 53.8mm 0.64 A/R turbine housing.
Stock Boost: 7 psi
Safe Boost: > 13-15 psi After that The Turbo is past it's efficiency
Max Boost: 17 psi
HP Ratings: 255 - 265 RWHP
Type of Bearings: Ball Bearing


S15 Black-Top T28:
Compressor: T-28, 60 trim 60 mm 0.64 A/R BCI-1 compressor in T-04B housing
Turbine: T-25, 62 trim 53.8mm 0.60 A/R turbine housing, Inconel Turbine Wheel.
Stock Boost: 7 psi
Safe Boost: > 15 - 18 psi After that The Turbo is past it's efficiency
Max Boost: 20 psi
HP Ratings: Approx. 300 RWHP MAX
Type of Bearings: Ball Bearing


N14 GTi-R (1990-94) T28:
Compressor: T3 Super-60, 60 trim 60mm 0.60 A/R BCI-1 compressor.
Turbine: T-25, 79 trim 53.8mm 0.86 A/R turbine housing, Inconel Turbine Wheel.
Stock Boost: 7 psi
Safe Boost: > 13-15 psi After that The Turbo is past it's efficiency
Max Boost: 17 psi
HP Ratings: 290 - 300 RWHP
Type of Bearings: Journal Bearing
Upgrades: Replace compressor Housing w/ S14 T28 and Max RWHP can be bumped upto 320

Updated: 1/11/09
Hope this helps...
thagr81 us is offline   Reply With Quote
Old 02-20-2009, 04:06 PM   #10
Junior Member
iTrader: (6)
 
Join Date: Feb 2009
Location: Salinas, CA
Posts: 446
Total Cats: 1
Default

I just bought a Red Top from a guy on Nico
Qckslvr is offline   Reply With Quote
Old 02-20-2009, 04:55 PM   #11
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

I am running the SR20 T25 from the S13 Black top. If left my turbine bolted to my DP and Mani, but simply swapped the compressor and CHRA with the T28 from the S14 Kouki...would this fit? What HP gain could I expect at the same boost level on a BP 1.8 over the T25?
thirdgen is online now   Reply With Quote
Old 02-20-2009, 05:09 PM   #12
Elite Member
iTrader: (9)
 
Saml01's Avatar
 
Join Date: Jul 2007
Location: NYC
Posts: 5,730
Total Cats: 2
Default

^ Good question. I am also curious.
Saml01 is offline   Reply With Quote
Old 02-20-2009, 05:24 PM   #13
Slowest Progress Ever
iTrader: (26)
 
thirdgen's Avatar
 
Join Date: Oct 2007
Location: The coal ridden hills of Pennsylvania
Posts: 5,806
Total Cats: 183
Default

The turbo efficiencies where rated in a Nissan 2.0 engine. I wonder what would happen to these efficiencies on a BP...
thirdgen is online now   Reply With Quote
Old 02-20-2009, 05:24 PM   #14
Hittin' Boost & Cones
Thread Starter
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

Quote:
Originally Posted by thagr81 us View Post
Here's the info that I got from 240SX Forums, where I'm a moderator...



Hope this helps...
Great info. seems about right. what site are you on? i was big on Nicoclub.com and 240sxone before i got out of the scene
240_to_miata is offline   Reply With Quote
Old 02-20-2009, 05:35 PM   #15
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,847
Total Cats: 1,788
Default

Quote:
Originally Posted by thirdgen View Post
What HP gain could I expect at the same boost level on a BP 1.8 over the T25?

this is the only difference between the two turbos (most T28s are a T3 60 trim):




so look at this compressor map:



and compare it with this one:



so a turbo that craps out at 25 lb/min (230BHP) vs one that craps out at 30 lb/min (275BHP)....
Braineack is offline   Reply With Quote
Old 02-20-2009, 05:39 PM   #16
Hittin' Boost & Cones
Thread Starter
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

sounds about right. getting 250rwhp on a sr20 with the stock turbo is a reach.
240_to_miata is offline   Reply With Quote
Old 02-21-2009, 10:09 AM   #17
Elite Member
iTrader: (5)
 
Join Date: Apr 2007
Location: Wellford, SC
Posts: 1,704
Total Cats: 1
Default

Quote:
Originally Posted by 240_to_miata_OWNER View Post
Great info. seems about right. what site are you on? i was big on Nicoclub.com and 240sxone before i got out of the scene
I've been on 240SX Forums since 2003... Been a MOD there since 2004.

Not sure about the interchanging of the compressor housings of T25 and T28s... I could post a thread over at 240SX Forums and see if they know about this upgrade. But I don't see why it wouldn't be possible to interchange them. My actual suggestion would be to change the compressor housing and compressor wheel to the T28 which would essentially give you a cheap T28. But I will do a bit more research and let you know what I find.
thagr81 us is offline   Reply With Quote
Old 02-23-2009, 11:17 AM   #18
Elite Member
iTrader: (5)
 
Join Date: Apr 2007
Location: Wellford, SC
Posts: 1,704
Total Cats: 1
Default

Posted a thread over at my home forum (240SX Forums) and will post the results of the thread when a good definitive answer arises...
thagr81 us is offline   Reply With Quote
Old 02-23-2009, 12:38 PM   #19
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,847
Total Cats: 1,788
Default

Quote:
Originally Posted by thagr81 us View Post
I've been on 240SX Forums since 2003... Been a MOD there since 2004.

Not sure about the interchanging of the compressor housings of T25 and T28s... I could post a thread over at 240SX Forums and see if they know about this upgrade. But I don't see why it wouldn't be possible to interchange them. My actual suggestion would be to change the compressor housing and compressor wheel to the T28 which would essentially give you a cheap T28. But I will do a bit more research and let you know what I find.
It's not anything new....it's what a T28 is. a t25 with a t3 compressor.

gpopshop.com
  • Garrett T25 Turbos: Example: Upgrade from a stock T25 wheel to a Big T28 wheel. Prices start at $200
Braineack is offline   Reply With Quote
Old 02-23-2009, 02:22 PM   #20
Elite Member
iTrader: (5)
 
Join Date: Apr 2007
Location: Wellford, SC
Posts: 1,704
Total Cats: 1
Default

^ That's what I was thinking... Just wanting to verify before giving out a false claim and causing unwanted spending on un-necessary parts.

However, using the CHRA from the S14 Kouki will give the benefit of being ball-bearing. Whereas the S13 and S14 Zenki do not...
thagr81 us 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
WTB MP62 (Hotside) (NB2) Rick02R WTB 3 01-03-2016 08:18 PM
Expected intake temps on the track? tazswing Race Prep 20 10-03-2015 12:04 PM
ISO 1.6 turbo cast iron manifold cale saurage DIY Turbo Discussion 16 10-01-2015 12:25 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 09:46 PM.