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Achieving 350 wheel horsepower (WHP) with an HKS GT II 3071R turbo on your SR20DET engine is an exciting project that can significantly enhance your vehicle’s performance. This guide will walk you through the necessary steps, modifications, and considerations to reach your power goals.
Understanding the SR20DET Engine
The SR20DET is a 2.0-liter inline-four engine that has gained popularity in the tuning community due to its robust design and potential for high power output. With the right modifications, it can handle significant horsepower increases.
Key Features of the SR20DET
- Iron block with aluminum DOHC head
- Factory turbocharged
- Good aftermarket support
Choosing the Right Turbo: HKS GT II 3071R
The HKS GT II 3071R turbo is known for its reliability and performance. This turbo can provide the boost needed to reach 350 WHP when paired with the right supporting modifications.
Specifications of HKS GT II 3071R
- Compressor Wheel: 71mm
- Turbine Wheel: 60mm
- Max Boost: Up to 1.5 bar
Essential Modifications for Achieving 350 WHP
To successfully reach 350 WHP, several modifications are essential. These upgrades will ensure that your SR20DET can handle the increased power and boost levels.
Engine Management System
A proper engine management system is crucial for tuning your SR20DET with the HKS GT II 3071R turbo. Consider options such as:
- Standalone ECU (e.g., AEM, Haltech)
- Reflashable stock ECU with tuning software
Fuel System Upgrades
To support the increased fuel demands, upgrade your fuel system components:
- High-flow fuel pump (e.g., Walbro 255)
- Upgraded fuel injectors (e.g., 550cc or larger)
- Upgraded fuel pressure regulator
Exhaust System Modifications
An efficient exhaust system will help reduce back pressure and improve turbo performance. Consider the following:
- 3-inch turbo-back exhaust system
- High-flow catalytic converter or test pipe
Intercooler Upgrade
A larger intercooler is essential for keeping intake temperatures down and maximizing performance. Look for:
- Front-mount intercooler with sufficient core size
- Quality piping to minimize pressure drops
Supporting Modifications
In addition to the essential modifications, consider these supporting upgrades for optimal performance and reliability:
Internal Engine Components
To ensure your engine can handle the increased power, consider upgrading internal components:
- Forged pistons
- Forged connecting rods
- Upgraded head gasket
Transmission and Drivetrain
With the increase in power, your transmission and drivetrain components should also be upgraded:
- Short throw shifter for quicker shifts
- Upgraded clutch (e.g., stage 2 or higher)
- Consider a stronger differential
Tuning for Performance
Once all modifications are complete, proper tuning is essential to achieve 350 WHP reliably. This involves:
- Dyno tuning with a professional tuner
- Monitoring air-fuel ratios and boost levels
- Adjusting ignition timing for optimal performance
Final Considerations
Achieving 350 WHP with an HKS GT II 3071R turbo on your SR20DET is an ambitious but rewarding project. Ensure that you take the necessary precautions and invest in quality parts to achieve your goals safely and effectively.
Safety and Reliability
Always prioritize safety and reliability in your build. Regular maintenance and checks will help keep your engine running smoothly while maximizing performance.