Direct-injection engines were introduced with a promise that sounded ideal: more power, better fuel efficiency, and cleaner ...

Internal combustion engines are fairly simply machines. When you break it down, they are nothing more than air pumps. When it comes to making horsepower and torque, the simple fact is the more air you ...

Editor's Note: As inanimate as intake manifolds may appear, they provide a path to both major and minor on-track power gains. Selection is one thing; "tuning" them to specific applications is a blend ...

Sponsored Content. We may receive a commission on purchases made from links. The 6.7-liter Cummins turbodiesel inline-6 is one of the most widely used diesel engines out there. It has been fitted to ...

Two huge, 87mm throttle bodies feed a separate intake plenum for each cylinder bank of the Z06 engine. Altogether it holds 11 liters of air in total—twice the cylinder displacement. Fun fact: the C7 ...

Cooling an engine's intake charge is an easy way to make power -- the colder the air, the denser the charge and the more oxygen your engine can mix with fuel to turn into power. This is so important ...

Copying a key design component from Ford, this was supposed to be Pontiac's best high-performance V8 of the '70s, but it ...

Internal combustion engines are fairly simply machines. When you break it down, they are nothing more than air pumps. When it comes to making horsepower and torque, the simple fact is the more air you ...