1JZ vs 2JZ

[o_bomb]

hmm... really GOOD question!! 1jz got a better flowing head and higher rev, and the 2jz more hp and tq!

"nopaint"

[Bruce Leroy]

hmm... really GOOD question!! 1jz got a better flowing head and higher rev, and the 2jz more hp and tq!

"nopaint"

Wrong

taken from:

http://www.supraforums.com/forum/sho....php?p=3864924


It has been a very common rumor on here for a long time that the 1JZ head flows better than the 2JZ. This has lead to alot of people doing the 1.5JZ swap or atleast wanting to. Over the last few weeks I have been building a 1JZ, including porting the head, for a customer. I flowed the head on our SF-600 flow bench before and after I ported the head.

A stock 2JZ flows about 238in and 154ex at .400 lift. A stock 1JZ head flows 215in and 133ex at .400 lift. After I did a good street port job including reworking the chamber the 1JZ head flowed 230in and 152ex at .400. This should put to rest the idea that the 1JZ head is better than the 2JZ, because the fact of the matter is that it is not better.

Erin

[o_bomb]

Wrong

I stand corrected!!