Non BB turbo that makes good #'s
04-16-2009, 08:05 AM
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Non BB turbo that makes good #'s
So right now I am running a SR20 turbo at 13psi. I have no idea what rwhp I am putting out...guessing 230? Let's pretend I had a GT2560 and I upgraded to a GT3071. If I'm not mistaken the 3071 would make more power with less boost compared to the 2560. My question is, what non ball bearing turbo could I upgrade to from my SR20 that would have this effect? I has to have the same footprint and also fit my turbine elbow. I would like to find a turbo that is pretty common and make a safe amount of power (250-280) on 12psi. If I did this, I should still be able to use my 460's, right?
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04-16-2009, 08:19 AM
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I actually was looking for one of those, cause I'm pretty sure that CHRA will swap directly into my turbine. I don't want to run 18psi though. I basically want to leave my car setup the way it is, but if I could change the CHRA and compressor, and make more power just by doin that, then I'm game.
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04-16-2009, 08:22 AM
#4
Here are the specs on all of the SR20DET turbochargers from 240SXForums.com where I'm a moderator. The guy who posted it is a good friend of mine and is very knowledgable about the content at hand:
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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04-16-2009, 08:35 AM
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That N14 T28 is what I am looking towards, except the turbine is different. The one I have now is from an S13 Red or Black top. If I changed the CHRA and compressor to the one from the S14 Zenki, I wouldn't gain a whole lot of hp. So let me rephrase my question: What journal bearing turbo (biggest one that shares my FM manifold footprint) would make the most power, say 275hp at under 14psi?
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04-16-2009, 08:54 AM
#8
New flow rate = SQRT(New Fuel Pressure/Base Fuel Pressure) * Rated injector flow rate
SQRT = Square Root
New Fuel Pressure = Fuel pressure after FPR has adjusted based on PSI of boost
Base Fuel Pressure = baseline fuel pressure without boost
Good luck!
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04-16-2009, 09:06 AM
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I run a rising RRFPR with my 460s for a few reasons, the main one being because it was cheaper than upgrading to 550s. Now I have an extra set of 550s and I'm still gonna keep the 460s in.
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