Particle trail on fast moving ship,,Version: 4.17.2

Hi guys so as the title suggest i am trying to create a particle effect that trails behind my ship creating a jet exhaust trail…However my ship has a maximum speed of 1500 .And the particles spread out too far apart leaving big gaps in the stream …I hope this makes sense …Any help is greatly appreciated i cannot find anything on google or youtube thanks …Also this is my first time using the particle system