The Nissan 350Z and 370Z are renowned for their sporty handling, sleek aesthetics, and potent V6 engines. However, beneath their factory-tuned exteriors lies a world of untapped potential waiting to be unleashed by the discerning tuner. This article delves deep into the tuning possibilities for both models, exploring various upgrades and modifications that can elevate their performance to new heights.
Tuning the Nissan Z
Both the 350Z and 370Z, with their VQ engines, respond exceptionally well to modifications. Enthusiasts of all levels can extract significant performance gains with carefully chosen upgrades. Let’s explore the key areas where these Z cars shine in the tuning world.
Engine Tuning
While the factory tune on both the 350Z (VQ35DE) and 370Z (VQ37VHR) provides a balance of performance and everyday usability, it leaves considerable room for improvement. Aftermarket tuning solutions, such as those offered by AAM Competition, can optimize ignition timing and fuel delivery, resulting in noticeable gains in horsepower and torque.
- 350Z: On a stock 350Z, expect gains of 15-20 horsepower and a similar increase in torque with a proper tune. Modified 350Zs can see even more significant improvements, with gains ranging from 15 to 35 horsepower. One 350Z owner reported improved driveability and fuel efficiency after a reflash.
- 370Z: AAM Competition’s UpRev tuning package offers similar horsepower and torque gains, along with increased efficiency and improved throttle response. One 370Z owner reported gains of 18 WHP and almost 23 lb-ft of torque after a tune.
Beyond basic tuning, advanced features like adjustable traction control and variable valve timing control are also possible. For those seeking a more personalized approach, Z1 Motorsports offers a Level 2 custom tuning process for the 370Z, involving data logging and iterative adjustments to maximize performance based on individual modifications.
It’s worth noting that tuning can be a complex process, especially when dealing with forced induction setups. One forum user shared their experience tuning a single-turbo 350Z with UpRev, highlighting challenges like AFR instability and detonation. This underscores the importance of careful tuning and data analysis to achieve optimal results.
Exhaust System Upgrades
Enhancing the exhaust system is a popular modification for both the 350Z and 370Z. Aftermarket exhausts not only improve performance but also provide a more aggressive exhaust note. However, it’s crucial to choose a system that includes a resonator to avoid excessive noise and drone, especially during highway driving.
- 350Z: The ISR Performance Circuit Spec Exhaust is a popular option, offering a deeper tone and performance gains for around $500. Borla also offers a stainless steel cat-back system for the 350Z, with dyno-proven gains of 15-20 horsepower and torque.
- 370Z: The DC Sports single canister exhaust, made from premium T-304 stainless steel, provides a deeper exhaust note and improved performance. XForce offers a twin 2.5″ stainless steel cat-back system with a unique crossover dual muffler design for a distinctive sound.
Intake System Enhancements
The factory air intake systems on both the 350Z and 370Z can restrict airflow, limiting the engine’s potential. Upgrading to an aftermarket intake system can improve airflow and provide noticeable power gains.
- 350Z: Popular options include the K&N 69 Series Typhoon and the Injen SP Series.
- 370Z: SOHO Motorsports offers a cold air intake kit designed specifically for the VQ37VHR engine.
Turbocharger Kits
For those seeking substantial power increases, turbocharger kits are available for both models. While turbocharging offers significant potential, these kits often require supporting modifications like fuel system upgrades and meticulous tuning to ensure reliability and longevity.
- 350Z: AAM Competition offers a twin-turbocharger system featuring BorgWarner EFR turbochargers capable of producing over 700 horsepower with a built motor. SOHO Motorsports also provides a single turbo kit, designed for efficiency and performance.
- 370Z: Unknown Performance USA offers a twin-turbo kit capable of achieving over 600 horsepower with supporting fuel system upgrades. VPF Tuning offers a single turbo kit utilizing high-quality components for significant power gains.
Suspension Upgrades
Upgrading the suspension is crucial for maximizing handling performance, especially when increasing power output. Coilovers are a popular choice for both 350Z and 370Z owners, allowing for adjustable ride height and damping to fine-tune the car’s handling characteristics.
- 350Z: Ksport Kontrol Pro coilovers offer 36 levels of damping adjustment for both handling and comfort. SLR Speed provides premium performance suspension products, including angle kits and lock kits designed for drifting and racing applications.
- 370Z: Options like Fortune Auto 500 Series, BC Racing BR Series, and Tein Street Advance Z provide varying levels of damping and height adjustment. SLR Speed offers similar upgrades as those available for the 350Z.
Dyno Charts and Performance Results
Dyno testing provides concrete evidence of performance gains achievable through tuning.
- A full bolt-on 350Z with an automatic transmission produced 263 WHP on a Dynocom dyno, translating to approximately 330 crank horsepower.
- Another 350Z owner reported dyno results showing an increase from 185rwkw to 196.8rwkw after installing an aftermarket exhaust.
- For the 370Z, one owner reported gains of 18 WHP and almost 23 lb-ft of torque after a tune by Z1 Motorsports. A Reddit user shared dyno results showing a 370Z with bolt-ons and an E85 tune achieving a significant increase in horsepower.
Limitations and Potential Drawbacks of Tuning
While tuning can unlock significant performance gains, it’s essential to be aware of potential drawbacks:
- Overly aggressive tuning or neglecting proper maintenance can lead to increased engine wear and potential damage.
- The 370Z’s automatic transmission has a power limit of around 400 WHP, while the VQ37VHR engine has a safe limit of approximately 500 crank horsepower.
Reputable Tuning Shops and Specialists
| Shop Name | Website | Description |
|---|---|---|
| Concept Z Performance | conceptzperformance.com | Offers a wide range of performance parts for Nissan and Infiniti vehicles. |
| SOHO Motorsports | sohomotorsports.com | Specializes in VQ-powered Nissan and Infiniti vehicles, offering tuning, fabrication, and maintenance services. |
| Z1 Motorsports | z1motorsports.com | Provides dyno tuning services using UpRev and EcuTek software, along with a wide selection of performance parts. |
| ZSpeed | zspeed.com | Offers performance parts and accessories for various Nissan and Infiniti models. |
Conclusion
The Nissan 350Z and 370Z offer tremendous tuning potential. From basic bolt-on modifications and ECU tuning to extensive forced induction setups and suspension overhauls, enthusiasts can transform these sports cars into formidable performance machines.
Key areas for improvement include engine tuning, exhaust systems, and intake enhancements. Both models respond well to these modifications, with noticeable gains in horsepower, torque, and overall driving experience. For those seeking even greater power, turbocharger kits are available, but they require careful consideration of supporting modifications and meticulous tuning.
While the possibilities are vast, it’s crucial to prioritize functionality and reliability. By carefully selecting modifications and working with experienced professionals, 350Z and 370Z owners can unleash the true potential of these already capable sports cars.