We left off with my 3.2-liter Porsche 911 motor torn down and in numerous pieces. To reach the desired goal of 80 hp/liter while retaining street manners and utilizing 91 octane pump gas, I chose to ...

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 ...