H22 Turbo Build with Precision Turbo 62mm Turbo: Achieving 420+ Rwhp

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The H22 engine is a popular choice among car enthusiasts looking to boost performance. With the right modifications, it can deliver impressive horsepower and torque figures. In this article, we will explore the process of building an H22 turbo setup using a Precision Turbo 62mm turbocharger, aiming to achieve over 420 rear-wheel horsepower (RWHP).

Understanding the H22 Engine

The H22 engine, originally designed by Honda, is known for its robust construction and high-revving capabilities. It features a DOHC design and has a displacement of 2.2 liters. This engine is a great candidate for turbocharging due to its solid internals and potential for high power outputs.

Choosing the Right Turbocharger

For this build, we have selected the Precision Turbo 62mm turbocharger. This turbo is well-regarded for its efficiency and ability to support high horsepower levels. It strikes a balance between quick spool time and top-end power, making it ideal for street and track applications.

Specifications of Precision Turbo 62mm

  • Compressor Wheel Diameter: 62mm
  • Turbine Wheel Diameter: 54mm
  • Max Horsepower: 600 HP
  • Compressor A/R: 0.60
  • Turbine A/R: 0.63

Essential Components for the Build

To achieve our goal of 420+ RWHP, several key components must be integrated into the H22 turbo build. Below is a list of essential parts needed for the setup:

  • Precision Turbo 62mm Turbocharger
  • Custom Turbo Manifold
  • Intercooler
  • Blow-off Valve (BOV)
  • Wastegate
  • Fuel Injectors (e.g., 750cc)
  • Fuel Pump (e.g., Walbro 255)
  • ECU with tuning capabilities
  • Upgraded pistons and rods (if necessary)
  • Exhaust System

Building the Turbo Setup

Once all components are gathered, the next step is to assemble the turbo setup. Here’s a step-by-step guide to get you started:

  • Remove the existing intake and exhaust components from the H22 engine.
  • Install the custom turbo manifold, ensuring proper alignment and fitment.
  • Attach the Precision Turbo 62mm turbocharger to the manifold.
  • Set up the intercooler in the front of the car for optimal airflow.
  • Connect the intake piping from the turbo to the intercooler, and then to the throttle body.
  • Install the blow-off valve on the intake piping to prevent compressor surge.
  • Mount the wastegate on the exhaust side to control boost levels.
  • Upgrade the fuel system with larger injectors and a high-flow fuel pump.
  • Ensure all connections are secure and leak-free.
  • Reinstall any necessary components and check for clearance issues.

Tuning for Performance

After the hardware installation is complete, tuning the engine is crucial for maximizing performance and ensuring reliability. A professional tuner should be consulted to adjust the ECU settings, optimizing fuel maps and ignition timing for the new setup.

Tuning Tips

  • Monitor air-fuel ratios (AFR) during tuning.
  • Adjust boost levels gradually to find the sweet spot.
  • Use a dynamometer to measure RWHP and torque outputs.
  • Make adjustments based on performance data and feedback.

Expected Performance Results

With the correct setup and tuning, the H22 turbo build with the Precision Turbo 62mm can achieve over 420 RWHP. This level of performance provides exhilarating acceleration and power delivery, making it suitable for both street and track use.

Conclusion

The H22 turbo build with a Precision Turbo 62mm turbocharger is an exciting project for any automotive enthusiast. With careful planning, quality components, and professional tuning, achieving over 420 RWHP is entirely possible. This setup not only enhances the performance of the H22 engine but also provides a thrilling driving experience.