How do i add a new engine to a MOD?

So i recently got a mod. But what i want to do is having a blow engine. And i can do that but on just the engines that i got. So if i want for example a 1.4 MPI *The stock car engine* but blown i need to edit the original engine and not having other one so i can have the stock engine factory new and the stock blown engine both at the same time.Can someone pls help?

 

Start reading the link below. You have to edit the "slots" and other things to make them available. Pay close attention on how you edit your new configuration or you will mess up other files. It is a long a laborious process and you need to learn some coding to do this.

https://documentation.beamng.com/modding/vehicle/intro_jbeam/

 

Thanks