An ignition coil takes voltage from the battery and multiplies it to create a spark at the spark plugs, which in turn ignites the engine. Cars have been using some form of the coil ignition system for ...

For mild street engines, stock valve springs are more than adequate. But if you've screwed in a big bumpstick for strip-banging or banzai runnin', then pay attention. Our plan was simple: Install a ...

When designing the suspension and ride characteristics of most factory cars engineers are primarily concerned that grandmothers won't spill their coffee or complain about poor ride quality. The result ...

Take a steel rod, wrap it into a spiral shape, throw some engineered heat-treating in the mix, and you've got yourself a coil spring. That spring can be used as part of your suspension to support the ...

The debate over coil-sprung suspension and tried-and-true leaf springs is fueled by much enthusiast passion. The Jp staff is questioned about it all the time, but despite conflicting opinions, there ...