General Motors has just been granted a patent by the United States Patent and Trademark office for a two stage turbo setup with variable geometry in an internal ...

PACCAR has filed a patent for a variable geometry turbine (VGT) that includes an adjustable nozzle and a controller. The nozzle is calibrated during normal operation by adjusting it towards a closed ...

Turbochargers are wonderful things, taking waste energy and using it to help an engine to produce more power. The variable-geometry turbocharger is an advanced version of this technology, which brings ...

Ducati has announced it will introduce new engine technology that will boost power and torque, improve fuel economy, reduce emissions and won’t affect servicing intervals. Ducati Testastretta engine ...

Something I've been kicking around for a while, and wanted to get opinions on: Is there a reason we can't use variable intake valve timing to "optimize" engine operation for E85 operation, while still ...

The length of an intake runner has a pretty significant effect on the way an engine delivers power. In simple terms, longer runners help generate better low-end torque, short runners provide high-rpm ...