GM’s third production overhead-valve V-8 engine in five years, the Buick “nailhead” was the warmup act for the small-block Chevy, and a classic in its own right.
They forego the conventional bell-shaped nozzle by placing a spike in the center of a toroidal combustion chamber. Since the spike is surrounded by 3,500ºC hot exhaust gas, cooling it is an enormous ...