When you shop through retailer links on our site, we may earn affiliate commissions. 100% of the fees we collect are used to support our nonprofit mission. Learn more. The process of walnut blasting, ...

Cummins engines used in Ram Heavy-duty trucks are famous for making insane performance gains with simple upgrades. Road-going truck owners just need to toe the line and keep their modified diesels ...

Our 1999 GT project has a ProCharger shoving more air into it than it could ever ingest on its own, but that doesn't mean there isn't more room to make our engine a better air pump. All that ...

OBJECTIVE: Wet flow, pressure excursions, port volume, runner length, plenum volume—all these figure into an engine's overall efficiency. But there's more… Sometimes theory is neat, but sometimes it ...

There is one inescapable issue all vehicle owners deal with – fuel quality. Gasoline engines get dirty on the inside, especially with today’s ethanol-added fuels that might form more deposits than ...