Leprechaun
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Most little bits and pieces like that restrictor are placed by factory on purpose so when the next model comes out if they want to up the power all they need to do is create some smoother plumbing for better air flow and other little tweak secrets they have.
When i spoke with a mazda dealer years ago i asked him about the diesel engines in the mazdas, he told me that the engines were designed with over 140kw of power in them but they were detuned so for future models to extract more power they did not have to design a new engine as yet.
I wouldnt be suprised if they use something along the lines of a dp chip built into the car to get more power on newer models.
Ahh. If that's restrictive, removing it will add induction and turbine noise to what you hear when you hit the accelerator.
Get the turbo hi flowed and make it a ball bearing turbo, that will help with the lag.
Most little bits and pieces like that restrictor are placed by factory on purpose so when the next model comes out if they want to up the power all they need to do is create some smoother plumbing for better air flow and other little tweak secrets they have.
When i spoke with a mazda dealer years ago i asked him about the diesel engines in the mazdas, he told me that the engines were designed with over 140kw of power in them but they were detuned so for future models to extract more power they did not have to design a new engine as yet.
I wouldnt be suprised if they use something along the lines of a dp chip built into the car to get more power on newer models.
High flowing on a petrol engine means they typically enlarge the nozzle size in the turbine housing (Reducing the housings AR, aspect ratio) Presumably on deisel it will be much the same
That raises the boost threshold as you have lower exhaust gas speed onto the turbine for a given amount of flow, but you also reduce back pressure in the exhaust manifold so when you do get boost you get more power at the same boost level provided your fuelling is right.
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