Normally diesel engines are designed to make little soot, but through engineering this can be changed. A switch is installed to inject extra fuel into the engine which is incompletely combusted leaving a large quantity of thick sooty black smoke to be blown out of the exhaust. Owners generally install custom exhausts or stacks, sometimes moving the outlet to the bed of the truck in a manner similar to an 18 wheeler. Cummins and Powerstroke diesels are the best, but it works on Duramaxs pretty well too. | Normally diesel engines are designed to make little soot, but through engineering this can be changed. A switch is installed to inject extra fuel into the engine which is incompletely combusted leaving a large quantity of thick sooty black smoke to be blown out of the exhaust. Owners generally install custom exhausts or stacks, sometimes moving the outlet to the bed of the truck in a manner similar to an 18 wheeler. Cummins and Powerstroke diesels are the best, but it works on Duramaxs pretty well too. |