- Increase the fuel pressure. This will cause more fuel to be injected into the cylinders, which will in turn produce more smoke. To increase fuel pressure, you can either install a fuel pressure regulator or a fuel pump booster.
- Advance the timing. This will cause the fuel to be injected earlier into the cylinders, which will also produce more smoke. To advance the timing, you can either turn the distributor or install an adjustable timing gear.
- Increase the boost pressure. This will force more air into the cylinders, which will also produce more smoke. To increase boost pressure, you can either install a larger turbo or a boost controller.
- Add a smoke switch. This is a simple electrical switch that can be used to turn off the EGR system and allow more fuel to flow into the exhaust. Smoke switches are available from a variety of aftermarket suppliers.
It is important to note that these modifications will all increase the emissions from your truck. You should only perform these modifications if you are aware of the environmental regulations in your area.
