[turbodg]

I have two japan spec 2jzgte's and I pulled the twin turbo's and exhaust manifold off and all be damned if those are not among the smallest exhaust ports coming out of the head I have ever seen! (they measure about 1 1/4 inches I.D) Are the US spec exhaust ports any different? Any one have any insight into this?

 

[Lagtime]

I have two japan spec 2jzgte's and I pulled the twin turbo's and exhaust manifold off and all be damned if those are not among the smallest exhaust ports coming out of the head I have ever seen! (they measure about 1 1/4 inches I.D) Are the US spec exhaust ports any different? Any one have any insight into this?

They are small on the US spec also. Plus the #1 and #6 angle in towards the center of the head.

The next big step in 2JZ power will come when someone figures out how to weld up and then re-shape and port those exhausts.