BorgWarner 2006+ Mini Cooper JCW Twin Scroll Upgrade Turbo (53039880146)
BorgWarner’s K03-2074 turbocharger (part# 5303-988-0146) is engineered to be a reliable and high-performance bolton upgrade turbo for the 2006+ Mini JCW (up to 255hp).
Mini John Cooper Works upgrade from BorgWarner AirWerks features
- High temperature alloy turbine housing
- Extended tip compressor wheel
- Twin scroll turbine housing
- Water cooled bearing housing
Using a high-flow twin scroll turbine housing combined with BorgWaner’s extended tip compressor wheel design – this turbocharger delivers early spool and outstanding boost response with torque and power gains across the powerband. Full-Race recommends the addition of an aftermarket exhaust system to compliment this turbo, although that is not required for the installation.
- Max warm oil pressure: 5 bar (73.5psi)
- Max cold oil pressure: 8 bar (118psi)
- When starting a fresh engine build or in extremely cold climates – oil pressure must reach 0.5bar (7.2psi) within 4 seconds maximum.
- Do not load the engine with full boost and WOT until full operating oil pressure is present
- Do not load the engine with full boost and WOT if any boost leaks are present (this can result in turbocharger overspeed)