Hey, so the “turbo boost” you’re hunting isn’t a real feature at all – it’s a little engine glitch that pops up when you hit the A button and the left/right d‑pad together at the exact moment the speed meter hits the halfway line. The game treats that combo as a one‑shot acceleration burst, so you’ll see the car jack up a few RPMs and sprint for a second before the meter drops back down. You can’t keep it on forever; it only fires once per race unless you’re lucky enough to line up the timing again. So if you’re looking to max out RPMs, the trick is just to press that combo at the right time – nothing more, nothing less. Good luck, and remember: this is a glitch, not a built‑in turbo.