I love how the devs made the exhaust pops and crackles! What an awesome addition that was. It lacks in a few ways though. Crackle noises are too consistent and the same. Here is reference of a game with very very good crackling and popping Assetto Corsa If there was any way to add audio clips of sheer crackling or popping with a random selection from a few different samples i think this could be achieved.
add Code: "instantAfterFireCoef": 3.0, "sustainedAfterFireCoef": 3.0, "sustainedAfterFireTime":4, "instantAfterFireSound": "event:>Vehicle>Afterfire>01_Single_EQ2", "sustainedAfterFireSound": "event:>Vehicle>Afterfire>01_Multi_EQ2", "shiftAfterFireSound": "event:>Vehicle>Afterfire>01_Single_EQ2", to your jbeam file. change the "instantAfterFireCoef" and "sustainedAfterFireCoef" to change the likeliness of afterfire happening. change the "sustainedAfterFireTime" to change how long the crackles will last for, and change the sounds to suit your liking. i believe usually it is Code: "instantAfterFireCoef": 1.0, "sustainedAfterFireCoef": 1.0, "sustainedAfterFireTime":2, "instantAfterFireSound": "event:>Vehicle>Afterfire>01_Single_EQ2", "sustainedAfterFireSound": "event:>Vehicle>Afterfire>01_Single_EQ2", "shiftAfterFireSound": "event:>Vehicle>Afterfire>01_Multi_EQ2", but by changing the "sustainedAfterFireSound" to be the "Multi_EQ2" you get crackles rather than pops, while keeping the initial pop which is the "instantAfterFireSound". race cars typically will use the "Single_EQ2" on shifts, while road cars will use "Multi_EQ2". play around with it and you'll be pleasantly surprised how much control this simple system adds.
anywhere inside a section called "mainEngine". it's easiest to add it to the engine itself, although it can be done on any part, such as ECU, intake, exhaust, or even front bumper if you wanted. but you'd have to add a "mainEngine" section to the front bumper, since it wouldn't normally have any modifications to the engine.
Not only the game's after fire sound is lackluster, but it should also change pitch depending on the RPM. That's what you will hear about the most if you listen for it.