* Engine Modifications: The 1.4 Duratec engine wasn't designed for forced induction. You'd need significant internal engine modifications to handle the increased pressure and stress a turbocharger will put on the engine's components. This includes stronger connecting rods, pistons, possibly a forged crankshaft, upgraded head studs, and a more robust oil pump. Failure to do this will likely result in catastrophic engine failure.
* Fuel System Upgrades: The stock fuel injectors and fuel pump won't be able to deliver the increased fuel needed to support the boosted power. Upgraded injectors, a higher-flow fuel pump, and potentially a fuel pressure regulator will be necessary.
* Exhaust System: A free-flowing exhaust system is crucial to allow the exhaust gases to spin the turbocharger efficiently. This means a new exhaust manifold designed for turbo applications, a downpipe, and a high-flow exhaust system.
* Intake System: A cold air intake system is needed to supply the engine with sufficient cool, dense air.
* Engine Management System (ECU): The stock ECU won't know how to manage the increased boost pressure and fuel requirements. You'll need a standalone ECU or a reprogrammed ECU to control the fuel delivery, ignition timing, and boost pressure. This is a complex process requiring specialized knowledge and tuning.
* Cooling System: The engine will generate significantly more heat under boost. You'll likely need an upgraded radiator, higher-capacity coolant, and possibly an oil cooler to keep everything running at safe temperatures.
* Turbocharger Selection: Choosing the correct turbocharger is critical. The wrong size turbo could lead to lag, inefficient performance, or damage to the engine.
In short, while technically feasible, fitting a turbo to a Fiesta MK6 1.4 is a very expensive and complex project requiring significant mechanical expertise and specialized tools. It's not a project for beginners. The cost of parts and labor could easily exceed the value of the car itself. Unless you have considerable experience with engine tuning and modification, it's strongly recommended to avoid this project. Consider a naturally aspirated engine upgrade or a different vehicle if you're looking for more power.
