In the 90s, Jap companies engineered strong engines using cast iron blocks and basic fuel injection systems. Such stock engines can withstand up to 500-600hp easily with modern standalone ECUs.

Engines such as the 4G63-T, 2JZ, RB26, SR20, B6 and B16 all legendary.

Nowadays, everything is made from aluminum, 3 cylinders, a soft turbo, many pesky electronics, and unreliable sensors.