Combining ECM calibration with a diesel delete kit removes the EGR and DPF systems entirely, allowing the tune to operate ...

The turning point comes in the form of EFI systems that can literally be bolted on like a carburetor—only unlike a carburetor, these systems tune themselves. No jets, no adjustments, no laptops—just ...

There's a new acronym floating around the performance industry—GDI—and it stands for gasoline direct injection. Among domestic production engines that have jumped heavily into the GDI segment are the ...

It’s a contentious affair that has been ongoing now in hot rodding for roughly 30 years … carburetors versus electronic fuel injection (EFI). There are ardent supporters and vociferous cynics on both ...

Electronic fuel-delivery and ignition controls have given us a new golden age of engine efficiency and performance. Most of us would never go back to the dark ages—say, before 1990—when you could ...

Some of us have been there. Others never have. For those who have seen the inside, we realize it's a scary and confusing place. We slowly found our way around the "safer areas," then ventured further ...

Jack Roush once was the most hands-on team owner in the NASCAR garage. It wouldn't be odd to walk into the garage on a race weekend and see Roush under the hood, fiddling with a carburetor. But with ...

Most modern vehicles have multi-port fuel injection (MFI) with a separate fuel injector for each cylinder. This system mixes the fuel and air together right in the intake port for eachengine cylinder ...