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 ...

If you could single out one particular part of an engine that is most misunderstood, you would likely mention the camshaft. The numbers associated with camshaft design have baffled many a car guy for ...

Your doctor will tell you that stress kills. The same is true for high-performance engines and it’s a safe bet that if your engine is running aggressive valvesprings and stud-mounted rockers, there’s ...