One of the most difficult tuning problems to overcome is the seemingly ever-present engine vacuum leak. Vacuum is an important component of the internal-combustion process because it controls basic ...

Jackson Ryan was CNET's science editor, and a multiple award-winning one at that. Earlier, he'd been a scientist, but he realized he wasn't very happy sitting at a lab bench all day. Science writing, ...

It's a spinoff rule that came from trying to make racers use stock components. Engines in street cars produce a lot of vacuum in the intake manifold because they are designed to spend the majority of ...