【セントラルNA最速 y君】ノーマルエンジンで22秒台を叩き出す異次元のRX-8の秘密はコスパ重視の徹底軽量化！？

Street Tuning Stories documents Japanese tuning cars, circuit racing, and the drivers behind them. In this episode, we feature the fastest NA Mazda RX-8 at Central Circuit, driven by y-kun. Clocking an incredible 1:22 lap, this machine defies logic: it runs on a cheap, used, completely stock rotary engine sourced from an online auction (Yahoo! Auctions). The secret to its speed? A ruthless 1040kg weight reduction, custom DIY aerodynamics, Link ECU tuning, and an unwavering "cost-performance" philosophy. This is the real story of Japanese grassroots time attack culture. ◆Street Tuning Stories Official X → https://x.com/ST_Stories_JDM ◆y-kun's X → https://x.com/ya53541447 【The Fastest NA RX-8 at Central Circuit | Stock Engine from Yahoo! Auctions】 The stage for this episode is Central Circuit. We closely follow "y-kun" and his Mazda RX-8, a machine that shocked everyone by hitting the 1-minute 22-second mark—the fastest time for a naturally aspirated (NA) RX-8 on this track. What’s truly mind-blowing is the spec. Far from being heavily tuned, the heart of this car is a completely stock, used rotary engine bought off Yahoo! Auctions. His philosophy is pure budget-efficiency: if it blows, he can swap it out cheaply. So, how does a stock engine manage the fastest NA lap time? The secret lies in an extreme weight reduction down to just 1040kg, modern full-computer control via Link ECU, and custom DIY aerodynamics. Instead of relying on expensive parts or flashy specs, y-kun pursues speed with ingenuity, clever part-swapping (like using NC Miata brake calipers), and an overwhelming DIY spirit. His "real-world car building" is the ultimate evolution of a privateer builder. Don't let the rough exterior fool you. Take a deep dive into the engineering of a truly logical time attack machine. ▼ Video Highlights: ・How a stock auction engine clocks the fastest NA lap at Central (1:22s) ・Weighing just 1040kg! The secrets behind the extreme stripped-out weight reduction & DIY aero ・Cost-effective tuning: Link ECU control, NC caliper swap, and smart engineering ・y-kun’s unwavering philosophy of balancing speed and fun ・The next goal: Challenging for the #1 spot in Japan 🔻 WE ARE LOOKING FOR CAR OWNERS TO FEATURE! (Global Recruitment) Street Tuning Stories is looking for passionate car owners to feature. We want to tell the story of your tuned car and the person behind the wheel. ・You have a clear philosophy, passion, or unique build concept (not just speed) ・There is a deep history/story between you and your car ・You want to share your passion with the world Any car model or genre is welcome. Feature shoots are completely free and filmed in professional quality. ◆ How to Entry: ・Send us a DM on X (Applications will close once slots are filled) 🔻 If you enjoyed the video: Please Like and Subscribe! Your support helps us bring the next story to life. Maybe your story will be next on Street Tuning Stories. #RX8 #MazdaRX8 #RotaryEngine #TimeAttack #CentralCircuit #JDM #JDMTrackCar #JapaneseTuningCars #StreetTuningStories #STS #TrackCar #13B #BudgetBuild #DIYCar