actually ..............a rear Turbo set up does not need any electronic upgrades as long as you keep it to about 5-7 psi boost.
General information
Lower underhood temperatures. No need to worry about melting wires, hoses, or other engine components, as with a front-mounted turbo.
Ease of installation.
Cooler oil to the turbo. Cool oil is better for both the turbo and engine.
Performance Sound. The turbo acts as a muffler and sounds like an aftermarket performance muffler. Turbo spool and rushing air from the blow-off valve make a unique sound that will turn heads!
No need for major modifications to your vehicle.
Increased gas mileage. Unlike a belt driven supercharger, the turbo utilizes "wasted" energy leaving your tailpipe. Most get 1-3 mpg increase in gas mileage compared to their original stock mpg numbers.
Easily can be converts back to stock.
More room under the hood.
Lowest Intake Air Temps. Low IAT's equate to more horsepower per pound of boost than any other forced induction option. Eliminates the need for a turbo-timer, which allows the engine to run after the car is shut off in order to cool down the turbo and prevent oil and bearing damage.
Denser exhaust gasses drive the turbo turbine wheel more efficiently.
Turbo is exposed to ambient air rather than underhood air. Allows for better cooling of turbo components.
No need for expensive headers, mufflers, or exhaust systems.
Turbo is closer to the tail pipe outlet. Provides a better pressure differential across the turbine wheel which promotes better flow across turbine.
Better weight transfer. Increases traction because the bulk of system is mounted in rear of vehicle rather than up front.
Less noise and heat in the passenger compartment.
I have helped with a custom built systems. Not really my personal cup of tea I would rather be "BLOWN" anyday.