The BNR Stage3 turbo is a great upgrade for the DISI engine in the MS3 and MS6 cars. It flows a lot more than the stock K04 and is as bolt in as it can be. Under the skin it is a Garrett 2871 and it maintains the great spool of the stock turbo but carries power much deeper into the RPM band.

The challenge with tuning this turbo is controlling boost. Using a 3 port electronic boost control solenoid connected to the stock ECU we were able to achieve a beautiful boost curve on this customer’s 2010 MazdaSpeed3. This car was running 3 gallons of E85 as well and in spite of the 90+ ambient heat in California made some very good and consistent numbers. The power curve is beautiful and he should see these numbers go up nicely as temperatures drop!