In last month's "Tech Scene," we compared the differences between Toyota's VVTL-i (Variable Valve Timing and Lift-intelligence) and Honda's VTEC (Variable Valve Timing and lift Electronic Control).

For about a year now, Crower has been dabbling in chill-cast replacement cams for Honda DOHC VTECs. One of the biggest hinderances to making a camshaft from scratch is matching the metal hardness to ...