Understanding Supercharger Technology for the VQ37VHR

The Nissan 370Z’s VQ37VHR engine is a naturally aspirated 3.7-liter V6 that produces approximately 332 horsepower from the factory. While this is respectable, forced induction unlocks significant additional potential. Supercharger kits for the 370Z generally fall into two categories: centrifugal and positive displacement (roots/twin-screw). Centrifugal superchargers (like Vortech and Stillen) operate similarly to a turbocharger but are belt-driven, offering linear power build-up and high top-end gains. Positive displacement superchargers provide instant torque at low RPMs but generate more heat. Most kits for the 370Z are centrifugal, intercooled systems that balance reliability with substantial power increases. Understanding these fundamentals helps enthusiasts choose the right kit based on their driving style and goals.

350Zstore Supercharger Kits Overview

350Zstore has long been a trusted source for Nissan Z parts, and their supercharger offerings for the 370Z range from daily-driver-friendly setups to all-out race builds. Each kit is designed to integrate with the VQ37VHR’s factory ECU or aftermarket tuning solutions, allowing for reliable power gains without sacrificing drivability.

Vortech Supercharger Kit

The Vortech V3 Si or V3 JT trim centrifugal supercharger kit is a staple among 370Z owners. Vortech’s self-contained oiling system eliminates the need to tap into the engine’s oil supply, simplifying installation and avoiding oil starvation risks. The kit includes a cast-aluminum bracket, a large air-to-air intercooler, and all necessary ducting. Power gains typically range from 100 to 120 wheel horsepower on a stock engine with a safe tune, pushing output to around 430-450 whp. With supporting mods and a custom tune, some owners have exceeded 500 whp. The Vortech kit is known for its robust build quality and consistent performance, making it a top recommendation from 350Zstore.

Stillen Supercharger Kit

Stillen’s foray into the 370Z market resulted in a well-engineered centrifugal supercharger system that emphasizes low-end response and moderate boost levels. The Stillen Gen 3 kit uses a Vortech V3 unit but with a proprietary intake manifold and bypass valve system that improves throttle response. Power gains are conservative yet rewarding: 80 to 90 horsepower at the wheels on a 93 octane tune, bringing the car to roughly 410-420 whp. Stillen’s kit includes an intercooler, oil cooler, and revised ECU calibration. It is often considered the most “OEM+” option due to its reliability and minimal aftermarket changes required. 350Zstore stocks this kit for owners who prioritize daily drivability and peace of mind.

GTM Supercharger Kit

GTM (Graf Motorsport) offers a supercharger system designed for maximum power output. This kit typically uses a larger Vortech head unit (such as the V3 YSi or JT trim) and includes a massive intercooler, upgraded injectors, and a fuel pump solution. Peak power gains can exceed 120 wheel horsepower on a conservative tune, and properly built engines have seen over 600 whp with race fuel. However, the GTM kit demands more supporting modifications: forged pistons, upgraded rods, stronger clutch, and a full exhaust system are often recommended. 350Zstore positions this kit for serious enthusiasts who are building a dedicated track or street beast and are willing to invest in the necessary drivetrain upgrades.

ARK Performance Supercharger Kits

ARK Performance has built a reputation for high-end exhaust systems and performance parts for Japanese sports cars. Their supercharger kits for the 370Z are engineered with a focus on airflow optimization and thermal management, delivering strong power gains while maintaining engine longevity.

ARK Performance Supercharger Kit

The standard ARK Performance supercharger kit features a centrifugal design with a specially cast intake manifold that reduces flow restriction. ARK uses a high-flow intercooler core and a helical-gear head unit for quiet operation. Out of the box, this kit provides 90 to 110 wheel horsepower gain, placing output in the 430-450 whp range on pump gas. The kit includes a brand-specific tune that preserves factory safety margins. ARK also offers an optional larger intercooler for warmer climates. This kit is a direct competitor to the Vortech and Stillen options, offering a slightly different air path that some tuners claim yields improved mid-range torque.

ARK Rev9 Supercharger Kit

For owners seeking extreme power, the ARK Rev9 supercharger kit upgrades to a larger head unit and a more aggressive compressor wheel. Power gains can surpass 120 wheel horsepower, with documented results over 550 whp on built engines. The kit requires a standalone ECU or a piggyback system for full control, and ARK recommends upgraded fuel system components. The Rev9 is aimed at serious racers and time-attack competitors who prioritize maximum output over daily comfort. Installation complexity is higher, but ARK provides detailed instructions and phone support. This kit is less common than the standard ARK system but offers headroom for those planning to push the limits.

Head-to-Head Comparison: 350Zstore vs ARK Performance

Choosing between the two retailers involves evaluating power goals, budget, and support network. Both offer kits from well-respected supercharger manufacturers (Vortech and Stillen at 350Zstore; ARK’s in-house and Vortech-based systems at ARK Performance).

  • Power Output: Both camps achieve 80-120+ whp gains depending on the kit and tuning. 350Zstore’s GTM option can produce the highest numbers with proper building, while ARK’s Rev9 is similarly capable.
  • Reliability: All kits are reliable when installed correctly and tuned conservatively. 350Zstore’s Stillen kit is widely regarded as the most conservative, while ARK’ standard kit also maintains strong safety margins.
  • Installation Complexity: Vortech and Stillen kits are well-documented with many DIY guides; ARK kits may require more custom work for the intake routing. Professional installation is recommended for all.
  • Price and Value: 350Zstore often has competitive pricing on Vortech and Stillen kits, and they run seasonal sales. ARK kits tend to be premium-priced due to their proprietary components. Support from both retailers is generally excellent.
  • Aftermarket Support: 350Zstore offers a large ecosystem of supporting mods (clutches, radiators, oil coolers) that can be bundled. ARK also carries their exhaust and suspension parts, simplifying a build from one source.

Ultimately, the choice comes down to personal preference. 350Zstore is ideal for those wanting a proven, widely used platform with extensive community knowledge. ARK Performance appeals to owners seeking a unique system with specialized airflow engineering and a cohesive aesthetic from the same brand.

Supporting Modifications for a Supercharged 370Z

Adding a supercharger is rarely a standalone modification. To realize the full potential and maintain reliability, several supporting upgrades become necessary:

  • Fuel System: Larger injectors and a higher-flow fuel pump are required for most kits. Many 370Z owners upgrade to 550cc or 650cc injectors and a Walbro 255 or DW300 pump.
  • Cooling: An upgraded radiator and oil cooler help manage increased heat. Some kits include an oil cooler, but a larger aftermarket unit is often recommended for track use.
  • Exhaust: A less restrictive exhaust system allows the supercharger to breathe. Cat-back or full turbo-back exhausts with high-flow catalysts or test pipes reduce backpressure and yield extra power.
  • Clutch and Flywheel: The stock clutch can slip beyond 400 whp. A stage 2 or stage 3 clutch kit (e.g., from South Bend Clutch or another supplier) is a common upgrade.
  • Driveline: The 370Z’s stock differential mounts and axles may need reinforcement at higher power levels. A one-piece driveshaft and upgraded axles are sometimes used in extreme builds.
  • Engine Internals: For power levels above 500 whp, forged pistons and rods are strongly recommended to handle increased cylinder pressure and heat.

Installation and Tuning Considerations

Supercharger installation is a major undertaking. Most kits are designed for professional installation, but experienced mechanics can do it themselves with a lift and specialty tools. Expect 10-20 hours of labor for a centrifugal kit. Tuning is the most critical step: a safe, custom tune can make the difference between a reliable daily driver and a constant source of worry. Many shops offer remote tuning via ECUTEK or UpRev, but a dyno tune is ideal to verify air-fuel ratios and ignition timing. 350Zstore and ARK Performance both provide starter calibrations, but they should be refined by a reputable tuner. Popular tuning resources include Z1 Motorsports and SoFlo Motorsports, both of which have experience with these exact kits.

Final Thoughts

Supercharging the Nissan 370Z transforms it into a thrilling machine that can rival modern performance cars. Both 350Zstore and ARK Performance offer exceptional supercharger kits that cater to different tastes and power goals. Whether you opt for the proven Vortech from 350Zstore, the balanced Stillen kit, or the engineered ARK system, the key is to pair the kit with proper supporting modifications and a quality tune. With the right setup, a supercharged 370Z delivers an unforgettable driving experience without compromising everyday usability. For more details, check out Vortech Superchargers and Stillen directly for technical specifications.