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Kinugawa Turbo TD04HL 13T 15T 19T 20T 7cm Conic Flange for VOLVO 740 940 B230FT B230FK

Kinugawa Turbo TD04HL 13T 15T 19T 20T 7cm Conic Flange for VOLVO 740 940 B230FT B230FK

Regular price $899.00USD
Regular price $899.00USD Sale price $899.00USD
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Crank Horsepower: 230-280HP (13T 40.7/56 mm Trim 53) for Gasoline

Choose Driving Styles By Following Options

Do you prioritize quick spool-up and low-end torque for street driving, or are you seeking maximum power for track days? Here are the 3 factors to tune prioritized.
kinugawa turbo how to fine tune spool time 3 factors
  • Priority: Highest
  • Impact on Spool Time: The A/R ratio directly influences the exhaust gas velocity and energy reaching the turbine wheel. A smaller A/R ratio generally leads to faster spool-up due to increased exhaust gas velocity, but it can also limit top-end power. A larger A/R ratio results in slower spool-up but can support higher power levels at higher RPMs.
2. Turbine Wheel Design:
  • Priority: High
  • Impact on Spool Time: The size and design of the turbine wheel affect its inertia and how efficiently it extracts energy from the exhaust gases. A smaller and lighter turbine wheel will typically spool up faster, but it might have lower peak power potential. The blade design also plays a role, with some designs optimized for faster spool-up.
3. Compressor Wheel Design:
  • Priority: Moderate
  • Impact on Spool Time: While the compressor wheel itself doesn't directly impact spool time, its design and size influence the overall balance and efficiency of the turbocharger. A larger compressor wheel requires more energy to spin, which can slightly increase spool time. However, a well-matched compressor wheel can improve overall efficiency and reduce backpressure, indirectly aiding spool-up.
Valve Type
Compressor Wheel
Turbine Wheel