For 1.8.1b, these manual adjustments were often necessary for a stable 60 FPS:
If you are looking to set up Mario Kart 8 Cemu 1.8.1b , you are likely revisiting a classic era of Wii U emulation. This version was a major milestone for performance, especially with the release of specialized "CorePacks" that simplified the installation of the game along with its updates and DLC. Quick Setup Guide for Cemu 1.8.1b Installer/CorePack : Many users in 2017 utilized the CorePack installer (~3.45 GB), which typically came pre-bundled with Cemu 1.8.1b , the latest game updates, and all DLC (Multi8). Optimal Settings Mario Kart 8 Installer - Cemu 1.8.1b
Circa late 2016 – early 2017 Platform: Windows PC (Cemu emulator) Game: Mario Kart 8 (Wii U) the latest game updates