Sr20 turbo specs!!
02-19-2009, 11:16 PM
#1
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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
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
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.
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.
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02-20-2009, 02:38 AM
#3
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?
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02-20-2009, 02:49 AM
#4
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.
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.
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02-20-2009, 08:02 AM
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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.
i just thought it was better info than nothing and decided to share.
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02-20-2009, 01:58 PM
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https://www.miataturbo.net/forum/t31697/
forgot to post this in the previous response...check it out.
forgot to post this in the previous response...check it out.
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02-20-2009, 02:55 PM
#9
Here's the info that I got from 240SX Forums, where I'm a moderator...
Hope this helps...
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
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
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02-20-2009, 03:55 PM
#11
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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?
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02-20-2009, 04:35 PM
#15
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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)....
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02-21-2009, 09:09 AM
#17
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.
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02-23-2009, 11:38 AM
#19
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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.
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.
gpopshop.com
- Garrett T25 Turbos: Example: Upgrade from a stock T25 wheel to a Big T28 wheel. Prices start at $200
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02-23-2009, 01:22 PM
#20
^ 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...
However, using the CHRA from the S14 Kouki will give the benefit of being ball-bearing. Whereas the S13 and S14 Zenki do not...
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