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I really think 300bhp is a figure that is probably out of reach, even with very deep pockets
Ideally, you would want, bigger or a hybrid turbo, uprated intercooler, dpf removal, some form of improved intake, bigger injectors, probably water/methanol injection, uprated clutch, lighter flywheel and a bespoke engine management system programmed to limit torque otherwise you will be lunching gearboxes
However, if its your dream to reach the magic 300bhp, then dont let anyone put you off, speak to some of specialist tuners, like Regal or Courtenay and see what they suggest as the route to get you there
I imagine the engine internals "might" take 300bhp, generally turbo diesel engines are more robust than their petrol equivalents, but, dont quote me specifically on the GM/Fiat 2.0cdti
Ideally, you would want, bigger or a hybrid turbo, uprated intercooler, dpf removal, some form of improved intake, bigger injectors, probably water/methanol injection, uprated clutch, lighter flywheel and a bespoke engine management system programmed to limit torque otherwise you will be lunching gearboxes
However, if its your dream to reach the magic 300bhp, then dont let anyone put you off, speak to some of specialist tuners, like Regal or Courtenay and see what they suggest as the route to get you there
I imagine the engine internals "might" take 300bhp, generally turbo diesel engines are more robust than their petrol equivalents, but, dont quote me specifically on the GM/Fiat 2.0cdti