I've recently had the pleasure to work with the folks at Turbohoses on developing and tuning a custom GT28RS turbo setup on a super nice 93 MR2 (46K miles on the odometer) owned by 1sexy2. The performance mods include:
Hydra Nemesis EMS w/ boost control solenoid
550cc Supra injectors, Supra fuel pump and dual feed fuel rail
Turbohoses stage 9 IC and custom 3" IC pipes
GT28RS (GT2860RS) BB turbo w/ 0.63 A/R T3 inlet, Ford 5-bolt outlet turbine housing and internal wastegate (see ATP catalog for more details)
Custom 3" DP and exhaust with catalytic converter (see this for more details)
Turbohoses 4" intake w/ 6" velocity stack
JoeO water injection kit (see this for more details)
Here are the 4th gear results of the setup at 19psi on 100 octane fuel:
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Keep in mind that this is a setup that can pass a smog sniffer test exactly as it is without a single change. In terms of driving this car on the street, it seems like the boost gauge is directly attached to the accelerator. At any RPM over 2500 in any gear you push the pedal to the floor and the boost gauge instantly jumps to 15+ psi.
In terms of performance, I tuned the setup to 11.2 AFR (note the dotted reference line) to leave room for the owner to drop in a straight catless exhaust pipe for use at the race track. This may be tested in the future when and if the owner actually decides to have the pipe made. For now he just wants a fast car that he can drive on the street.
Overall, I am very happy to report that this turbo can push over 300rwhp through a catalytic converter at 11.2 AFR on a stock motor.
On California 91 octane premium fuel, it makes a safe 270rwhp at 17 psi. Bad stuff, that Cali pump gas.
The car itself is an absolute joy to behold and drive. 1sexy2 has spent so much time, money and effort modifying it and paying attention to every detail that I took it as a personal challenge to make the performance, reliability and drivability aspect of it match the rest of the car without touching the internals of the motor or the head. I feel that I did justice to those goals. I also hope to see and tune more of these GT2860RS turbos in the future.
Hydra Nemesis EMS w/ boost control solenoid
550cc Supra injectors, Supra fuel pump and dual feed fuel rail
Turbohoses stage 9 IC and custom 3" IC pipes
GT28RS (GT2860RS) BB turbo w/ 0.63 A/R T3 inlet, Ford 5-bolt outlet turbine housing and internal wastegate (see ATP catalog for more details)
Custom 3" DP and exhaust with catalytic converter (see this for more details)
Turbohoses 4" intake w/ 6" velocity stack
JoeO water injection kit (see this for more details)
Here are the 4th gear results of the setup at 19psi on 100 octane fuel:
Keep in mind that this is a setup that can pass a smog sniffer test exactly as it is without a single change. In terms of driving this car on the street, it seems like the boost gauge is directly attached to the accelerator. At any RPM over 2500 in any gear you push the pedal to the floor and the boost gauge instantly jumps to 15+ psi.
In terms of performance, I tuned the setup to 11.2 AFR (note the dotted reference line) to leave room for the owner to drop in a straight catless exhaust pipe for use at the race track. This may be tested in the future when and if the owner actually decides to have the pipe made. For now he just wants a fast car that he can drive on the street.
Overall, I am very happy to report that this turbo can push over 300rwhp through a catalytic converter at 11.2 AFR on a stock motor.
On California 91 octane premium fuel, it makes a safe 270rwhp at 17 psi. Bad stuff, that Cali pump gas.
The car itself is an absolute joy to behold and drive. 1sexy2 has spent so much time, money and effort modifying it and paying attention to every detail that I took it as a personal challenge to make the performance, reliability and drivability aspect of it match the rest of the car without touching the internals of the motor or the head. I feel that I did justice to those goals. I also hope to see and tune more of these GT2860RS turbos in the future.
