No. It's not so simple as just bolting on a turbo. There are a ton of things which need to be done to accommodate a turbo on an engine that wasn't designed for it in the first place. For one, I don't think there is any turbo variant of the 3ZR-FAE engine that is in our cars. This means the internals of the engine are not up to par to deal with the additional cylinder pressures the come with forced induction. The pistons, connecting rods, and crank have to be built to deal with the duties of handling a turbo....possibly the bottom end of the engine block with the main caps too. Oiling has to be updated as the turbo requires engine oil to keep the bearings lubricated. Some systems will also run engine coolant through the turbo to keep the turbo bearings cool. And last but certainly not least, the engine computer has to be updated to support a turbo. This requires tuning on a dyno if the stock computer is able to be programmed with different fuel mappings. This is not even considering the made of glass power handling of the CVT trans we have in the car. Swapping another engine that has more power isn't a viable option either....even if it has a turbo already from another Toyota. You have to ensure the engine mounts line up. The electronics can be transferred over such as the wiring harnesses and engine computer. You'll most likely need to transfer the transmission. The trans mounts would need to line up with the mounting points in the C-HR engine bay. And all of this has to be able to line up with how the suspension is setup where the axles are going to connect into the transmission. The only viable engine swap I can see that will add power is the M20A-FKS used in the Lexus UX200 which is essentially a C-HR. This engine should physically just drop in along with the direct shift transmission as that also needs to be moved over. The engine computer and harnesses will have to be moved over. And after all of that is done, you don't know if the engine will run right as there is a tight integration between the engine computer and the rest of the computer modules in the car such as the BCM. All of these systems communicate over the CAN BUS. Even if all of this worked as planned, you're looking at what? Probably near $10k for all the work to get what? An additional 20HP? As I keep saying and it seems to hurt people's feelings, the C-HR is NOT a performance car. Never was designed that way and never will. Despite the exterior styling alluding to more. If you wanted a performance car, you should have bought one from the beginning. I say this as an old fart that has been through what many of you are looking to do. Had I known what I know now back then, I would have saved myself a ton of money and ended up with a car that would have performed better with the money I had spent.
