RPM freak wrote:E60 has 2 types of engines.
1 is the older version that has 218hp, NO DPF, old style CR2 injectors and vacuum controlled turbo.
2 is the newer version that has 231hp, DPF, new style piezo injectors and electrically controlled turbo.
The two types of engines original have max rail pressure of 1600 bar that can be pushed up to 1700+ depending on HP that is needed.
The 1 type of engine can be tuned up to 300hp with all original parts. Above that the turbo cant produce boost and pull air in to the engine. The injectors are slow and they cant cope with the demand of fuel. The car will start to smoke.
The 2 type of engine can be tuned up to 325hp with original parts. Above that the turbo cant produce boost and pull air in to the engine. The injectors are faster and they can handle the fuel demand. DPF must be removed for the engine to make this power.
The E60 535D twin turbo engine with 286hp has original boost of 1.8 bars.
To make 400+ HP on this engine is you will need turbo that can make at least 2 bars off boost and will pull more then 1500 mg/stroke of air all the time true the RPM range, injection pump that can make around 2000 bars and upgraded injectors that can deliver the fuel that is needed for that hp.
With 300hp tune the engine is making 650Nm of torque. That is 50Nm more then the factory rating of the gearbox.
RPM freak wrote:Yes you can pass 300 hp with that engine and bigger turbo, but you must rev the engine up to 5000 RPM. This power can be used in quick accelerations and i do not recommend to be used daily. The stress on the internal parts is to big and that stress can result in internal engine damage.
You problem will be the ECU. You like to run the new engine that is controlled with DDE6 on DDE4 ECU. My advice to you is to first try to start the engine and then think about HP upgrade.
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