I'm stumped on starter motor sounds and it is one of the last touches. Right now my engine.jbeam contains the relevant properties specified by the wiki. So far this is the closest ive come to information outside of the wiki which was 3 years ago. https://www.beamng.com/threads/engine-startup-sounds.67753/ Credit will be due to anyone willing to help.
Never mind I figured it out. It really was dead simple in the end. It was a volume issue from the start that lead me down a road of time wasting. "starterSample":"art/sound/starter/jnk_start.ogg", "starterLoopSample":"art/sound/starter/jnk_start_loop.ogg", "shutOffSampleEngine":"event:>Engine>Shutoff>v8_19xy_eng", "shutOffSampleExhaust":"event:>Engine>Shutoff>v8_19xy_exh", "starterLoopTime": 0.275, "starterVolume":2.76, "starterLoopVolume": 3.76, "shutOffVolumeEngine":0.76, "shutOffVolumeExhaust":0.76, "starterThrottleKillTime":0.5, "idleRPMStartRate":2.25, "idleRPMStartCoef":2,