Why Do Some Use Ductile Iron?
The “ductile iron” cylinder business apparently started with drag racers. The fact is, ductile iron is a stronger metal than gray cast iron. Ductile iron will withestand higher cylinder head pressure than gray cast iron. If your traveling is limited to a quarter mile, you’re going to use a much cooler-burning fuel (such as nitro-methane), and you’re going to take your engine apart after every race, it is a better material. For everyday use, it’s an eventual disaster.
