02/04/2012
Is a Turbocharger Necessary for Your Mazda RX8?
The Mazda RX8, with its unique rotary engine, is already a performance-oriented machine. However, for many enthusiasts, the quest for more power is an unending one. One of the most significant ways to boost performance is by fitting a turbocharger. But is a turbocharger truly necessary for your RX8, and what does the process entail? This article delves into the world of RX8 turbo upgrades, exploring what's involved, the benefits, and crucial considerations.
Understanding the RX8's Rotary Heart
Before diving into turbocharging, it's essential to appreciate the Wankel rotary engine that powers the RX8. Unlike conventional piston engines, the rotary engine uses a triangular rotor that spins within an oval-shaped housing. This design offers a high power-to-weight ratio and a smooth delivery of power, often characterised by its distinctive engine note. However, naturally aspirated rotary engines can sometimes feel a little lacking in low-end torque compared to their turbocharged counterparts.
The Case for a Turbo Upgrade
For those seeking a more potent driving experience, a turbocharger can dramatically transform the RX8. A turbocharger works by forcing more air into the engine's combustion chambers, allowing for more fuel to be injected and, consequently, producing more power. The MAZFIX Stage 1 Turbo Upgrade Kit is a prime example of such a modification, promising a substantial power increase, with approximately 200kW at the flywheel.
What is the MAZFIX RX8 Turbo Upgrade Kit?
MAZFIX Performance, with over 20 years of rotary experience, offers a comprehensive in-house designed Stage 1 Turbo Upgrade Kit for the RX8. This kit is designed to address the factory's perceived lack of power, delivering a significant performance boost. Rigorously tested on the street, strip, and track for over 4.5 years, with one customer reportedly clocking over 100,000km with the kit fitted, it demonstrates a level of proven reliability. This kit is a popular choice, attracting customers from across the country.
The MAZFIX Stage 1 Turbo Upgrade Kit typically includes:
- A high-quality, double ball bearing turbocharger with an internal wastegate.
- A PWR Intercooler to manage intake air temperatures.
- Durable stainless steel pipework for efficient airflow.
- A bolt-up exhaust system that requires no cutting or modification to the standard exhaust.
- A retuned Factory ECU to optimise engine performance with the new components.
- The conversion is completely reversible and unboltable.
- It utilises the standard exhaust and air intake systems, simplifying installation.
- The package is fully installed and tuned by experienced technicians.
The result is an RX8 that drives like a standard car until you demand more power, at which point the turbocharger delivers exhilarating acceleration. Fuel economy is reported to be similar to the factory setup, unless the boost is actively being used.
Considering an REW Engine Swap?
For those looking for a more substantial modification, swapping in a 13B-REW engine from a Mazda RX-7 is an option. However, this is a complex undertaking. It's crucial to be aware that a REW engine may not pass emissions inspections in an RX8, so checking local laws is paramount. Additionally, finding a suitable supercharger for sale can be a challenging and expensive endeavour, with prices reported to be in the region of $8,000.
Beyond the Turbo: Other RX8 Upgrades
While a turbo upgrade is a significant modification, MAZFIX Performance offers a wide array of other upgrades to enhance your RX8's performance, handling, and aesthetics. These include:
Engine and Drivetrain Enhancements
- Throttle Control Chip: This modification aims to improve throttle response and acceleration without directly increasing power. The company offers a 'try before you buy' approach, confident in its effectiveness.
- Upgraded Ignition Coil Packs: Direct replacements for factory units, these are noted as an upgrade over standard coils.
- Clutch Upgrade & Lightweight Flywheel: Essential for handling the increased power of a turbo, the upgraded clutch offers a lighter pedal feel and improved response. A lightweight flywheel can also contribute to quicker engine response.
- Oil Cooler Kits: The Australian climate, generally warmer than Japan or the US, necessitates an upgrade to the single factory oil cooler. A second oil cooler is highly recommended, especially for track use, to maintain optimal engine temperatures.
- Radiator Upgrade: Featuring double the water capacity and full alloy construction, this upgrade enhances reliability and cooling efficiency.
- Factory ECU Re-Tuning: Optimising the factory ECU can unlock power gains and improve fuel economy, especially when combined with other modifications like intake or exhaust upgrades.
- Engine Rebuilds: MAZFIX offers comprehensive engine rebuilds, from standard units to more performance-oriented builds with options for porting and apex seal upgrades. Steel race apex seals are recommended as an insurance policy against engine damage.
Suspension and Handling
To complement the increased power, MAZFIX offers a range of suspension upgrades, from upgraded sway bars to fully electronically controllable coil-overs, designed to enhance the RX8's already impressive handling characteristics.
Body Styling and Aesthetics
For those who want their RX8 to stand out, MAZFIX provides various body styling options, including genuine Mazdaspeed body kits, carbon fibre bonnets, and even scissor door conversion kits, transforming the car into a unique street machine.
Exhaust Systems
To enhance the distinctive rotary sound and improve exhaust flow, MAZFIX offers exhaust upgrades ranging from cat-back stainless steel systems to a full 3-inch high-flow system, suitable for both street and track applications.
Essential Considerations for Turbocharging an RX8
While the allure of a turbocharged RX8 is undeniable, it's crucial to approach this modification with careful planning and a clear understanding of the implications:
| Consideration | Details |
|---|---|
| Engine Health | Ensure your RX8's rotary engine is in excellent condition before turbocharging. A pre-existing issue could be exacerbated by the added stress of a turbo. Regular servicing and attention to the engine's unique needs are vital. |
| Emissions Compliance | As mentioned, turbo conversions, especially those involving engine swaps like the REW, may not meet local emissions standards. Always verify compliance with your local authorities. |
| Drivetrain Strength | The increased power and torque will put extra strain on the drivetrain, particularly the clutch and gearbox. Upgrading the clutch is highly recommended, and the gearbox's longevity should be considered. |
| Cooling Systems | Turbocharging generates more heat. Upgrading the oil cooler and potentially the radiator is essential to maintain optimal operating temperatures and prevent engine damage. |
| Professional Installation and Tuning | This is not a DIY job for the faint-hearted. Professional installation by experienced rotary specialists, coupled with precise ECU tuning, is critical for both performance and reliability. |
| Cost | Turbo upgrade kits, installation, and associated supporting modifications represent a significant investment. Factor in the cost of parts, labour, tuning, and potential unforeseen issues. |
| Reliability Expectation | While kits like MAZFIX's are designed for reliability, a turbocharged engine will generally be under more stress than a naturally aspirated one. Proper maintenance and a mindful driving style are key. |
Frequently Asked Questions
Q1: Is a turbocharger really necessary for my RX8?
It depends on your goals. If you're seeking a significant increase in power and torque beyond what the naturally aspirated engine offers, a turbocharger is an effective solution. However, the RX8 is already a capable and engaging car in its standard form.
Q2: What are the risks of turbocharging an RX8?
Risks include increased stress on the engine and drivetrain, potential for overheating if cooling systems aren't upgraded, and the possibility of encountering emissions issues. Meticulous installation and tuning are crucial to mitigate these risks.
Q3: Can I fit a turbo to a standard RX8 engine?
Yes, kits like the MAZFIX Stage 1 are designed to fit the standard RX8 engine, provided it's in good health. However, supporting modifications like a clutch upgrade and improved cooling are strongly advised.
Q4: How much power can I expect from a turbo RX8?
The MAZFIX Stage 1 kit offers around 200kW at the flywheel. More aggressive setups with larger turbos and further engine modifications can yield significantly higher figures, but these come with increased complexity and potential reliability trade-offs.
Q5: Will a turbo affect my RX8's fuel economy?
Generally, fuel economy will remain similar to stock during normal driving. However, when the turbo is actively boosting and delivering more power, fuel consumption will increase noticeably.
Conclusion
Adding a turbocharger to your Mazda RX8 is a significant modification that can unlock a thrilling new level of performance. Kits like the MAZFIX Stage 1 Turbo Upgrade offer a well-engineered solution for those seeking more power. However, it's a decision that requires careful consideration of the associated costs, the importance of engine health, and the necessity of supporting modifications. For the dedicated enthusiast, a turbocharged RX8 can be a truly exhilarating machine, but it demands respect for the engineering and commitment to proper maintenance.
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