can someone tell me the difference between a 1jz and a 2jz

[bioskyline]

Originally Posted by 907mge

From what I understand the 1jz has a higher reving head. If you search you may find what they call a 1.5jz that is a 2jz bottom with a 1jz head.

the 1jz head flows better than the 2jz head. the 2jz head has a "s" shape in the exaust ports bettwen cyls 4 and 5. the 1jz head does not have this.

1jz Cylinder bore was 86 mm (3.39 in) and stroke was 71.5 mm (2.81 in)
2jz Cylinder bore was 86 mm (3.39 in) and stroke was 86 mm (3.39 in)

ths shorter stoke is what lets rev so high.