The 1JZ head on the 3.0 block, known as a 1.5JZ becomes a restriction at 600-700HP. Above those levels, the 2JZ head really has an advantage.
I am a firm believer that an equal power 1JZ will own a 2JZ anyday. 600HP 1JZ > 600HP 2JZ because of it's higher revving capability.
I am a firm believer that an equal power 1JZ will own a 2JZ anyday. 600HP 1JZ > 600HP 2JZ because of it's higher revving capability.