Use a trusted tool like the GTA San Andreas 1.0 Downgrader or the SA-MP patcher SA-MP .

The physics engine of GTA San Andreas is tied to the frame rate. If you turn off the "Frame Limiter" in the options menu to play at 60+ FPS, swimming becomes impossible, cars brake instantly, and certain missions break entirely. de-couples the physics from the framerate, allowing smooth 60+ FPS gameplay without glitches. Safety and Security Warning

: Fixed the "Rain/Thunderstorm" audio bug that caused crashes, corrected the coloring of destroyed cars, and enabled the mapping of the Numpad 5 key.