Cost Comparison: Building a 500 Hp Rx-8 Ls Swap Vsturbocharged Rotary Setup

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When it comes to performance upgrades for the Mazda RX-8, two popular options stand out: the LS swap and a turbocharged rotary setup. Each has its own merits, costs, and challenges. In this article, we will compare the costs associated with building a 500 HP RX-8 using both methods.

Overview of the RX-8 Performance Options

The RX-8 is known for its lightweight chassis and unique rotary engine. However, many enthusiasts seek more power than the stock rotary engine can provide. The two main routes are:

  • LS Swap: Replacing the rotary engine with a V8 engine from General Motors.
  • Turbocharged Rotary: Adding a turbocharger to the existing rotary engine for increased power.

Cost Breakdown of an LS Swap

Performing an LS swap on an RX-8 involves several components and labor costs. Here’s a detailed breakdown:

  • Engine Cost: $5,000 – $8,000 for a used or rebuilt LS engine.
  • Transmission: $1,500 – $3,000 for an appropriate transmission (T56 or similar).
  • Mounting Kit: $500 – $1,500 for engine mounts and crossmembers.
  • Wiring Harness: $300 – $1,000 for a custom wiring harness.
  • Exhaust System: $1,000 – $2,000 for custom exhaust fabrication.
  • Labor Costs: $2,000 – $4,000 for professional installation.

Overall, the total cost for an LS swap can range from $10,300 to $19,500, depending on the quality of parts and labor.

Cost Breakdown of a Turbocharged Rotary Setup

Upgrading the rotary engine with a turbocharger can also yield significant power increases. Here’s a breakdown of the costs involved:

  • Turbocharger Kit: $1,500 – $3,500 for a complete turbo kit.
  • Engine Management: $500 – $1,500 for an aftermarket ECU or tuning.
  • Fuel System Upgrades: $500 – $1,000 for larger injectors and fuel pump.
  • Intercooler: $300 – $800 for a suitable intercooler.
  • Exhaust System: $500 – $1,500 for a turbo-back exhaust.
  • Labor Costs: $1,000 – $2,500 for installation and tuning.

When adding it all up, the total cost for a turbocharged rotary setup ranges from $4,300 to $10,800, making it a more budget-friendly option compared to the LS swap.

Performance Comparison

While both setups aim for 500 HP, their performance characteristics differ significantly:

  • LS Swap: Offers more torque and linear power delivery, making it suitable for various driving conditions.
  • Turbocharged Rotary: Provides a unique powerband with high RPM potential, ideal for track use.

Additional Considerations

Beyond just the initial costs, there are other factors to consider when choosing between an LS swap and a turbocharged rotary setup:

  • Reliability: LS engines are generally regarded as more reliable compared to rotary engines.
  • Maintenance: Rotary engines require more frequent maintenance and care.
  • Weight Distribution: An LS swap may alter the weight distribution of the RX-8, affecting handling.
  • Community Support: Both options have strong communities, but LS swaps have more widespread resources available.

Conclusion

Choosing between an LS swap and a turbocharged rotary setup for your RX-8 ultimately depends on your budget, performance goals, and personal preference. The LS swap offers a powerful, reliable option but at a higher cost, while the turbocharged rotary setup provides a more economical route with its own unique performance characteristics. Weigh your options carefully and consider what best fits your vision for your RX-8.