640+ WHP Nissan 300ZX Twin Turbo // T56 6-Speed Swap Final Dyno Results (Part 2)

This video covers the culmination of a 9-year restoration journey, final flex-fuel calibration, and high-boost dyno results for Leonard's stunning red Nissan 300ZX Twin Turbo (Z32). As many in the JDM enthusiast community know, taking a vehicle from a non-running state plagued by low compression and rod knock to a modern, reliable street machine requires immense patience and precise technical execution. Following our Part 1 installation breakdown of the prototype Grannis Racing T56 6-speed conversion kit, Seb straps the Z32 onto the rollers to test its capabilities. This engine build features Wiseco pistons, Eagle rods, and Jim Wolf Technology (JWT) Sport 700 turbochargers feeding into an oversized valve and cam package designed to optimize high-RPM airflow. With standard throttle bodies and a factory MAF sensor setup intact to avoid tuning reversion errors, the team pushes the limits of what a street-driven V6 can safely deliver. A major focus of this video is showcasing the real-world advantages of E85 flex-fuel technology. Seb demonstrates how the factory ECU architecture adapts between a conservative 91 octane pump baseline and an aggressive 26 PSI high-boost ethanol configuration. Thanks to a heavily reinforced fuel pump infrastructure featuring dedicated 8-gauge grounding lines and a high-pressure Walbro 450 system, the Nismo 740cc injectors safely deliver a massive 200-horsepower gain over standard gasoline. Build Features & Highlights: Drivetrain Innovation: Operates as a development vehicle for the Grannis Racing T56 cast bellhousing swap, precision-indexed to under 6-thousandths of an inch to protect input shaft thrust bearings. Optimized Core VG30: Forged internal package using 8.8:1 Wiseco pistons, Eagle rods, JWT 500 cams, and half-millimeter oversized valves. Stealth Electrical: High-output Walbro 450 fuel pump, custom hardwired and grounded directly to the rear frame rail via 8-gauge copper wiring to maximize flow consistency. Specialty Z Standard: We don't just clear target numbers, we focus on creating family-heirloom vehicles built with clean aesthetic styling, reliable heat management, and absolute structural peace of mind for the next 20 years. In This Video: 0:00 - The 9-year vision: Rescuing an unusable project car from Chatsworth 2:10 - Styling execution: Wrinkle red styling cues, engine dress-up, and fresh Work Wheels 3:45 - Induction and head package overview: JWT Sport 700s and flow dynamics 5:50 - Engineering a reliable electrical path: Fuel pump hardwiring and strategic grounding 7:40 - Dyno tuning showdown: 13 PSI 91 octane baseline vs. 26 PSI E85 high-boost pulls 10:15 - Tracking the target safety margins: Evaluating high-boost fuel pressure tracking maps 12:20 - Final drive review and delivering the keys back to the owner WHAT TO EXPECT ?! ⚙️ Hear the turbos. 🔥 Feel the passion. 🔧 Expect Many DYNO pulls, behind-the-scenes tuning action, and plenty of car culture 👉 Subscribe for more insane builds, turbo setups, and behind-the-scenes content. 💻 Shop Specialty Z Products All of our in-house performance parts are available on our official website: www.specialtyz.com . For questions or custom inquiries, email us directly at [email protected] . 📲 Stay Connected Follow us on social media for updates, behind-the-scenes content, and more: Instagram: @specialtyz Facebook: Specialty Z 👍 Support the Channel Don’t forget to Like, Comment, Subscribe, and Share to help us bring you more Nissan & Infiniti content! #Nissan #Infiniti #GTR #Skyline #NISMO #370Z #350Z #300ZX #TwinTurbo #JDM #Racing #Racecar #Automotive #Z32 #Z33 #Z34 #R35 #R32 #R33 #Datsun #Performance #CarCulture #CarSpotting #2024 #NissanZ