Once active, they provide more lift and longer lift ... Interestingly, brands like Nissan and Toyota developed their own versions of VTEC called Neo VVL and VVTL-i, respectively, which look ...

What is variable valve lift? What is variable valve timing? We're going to look at the valvtrain from a 2009 Audi 2.0L I4 Turbo engine to check out the differences. Variable valve lift is used to ...

The U.S. military has completed successful test flights of a reusable hypersonic rocket-powered aircraft, its first such accomplishment in more than a half century. The win is a sign of the ...