1G Head 1JZ Block?

[JDMMA70]

Can this be done, im reading one of those hyper rev mags and maybe i translated incorrect as my japanese isnt as good as it used to be, but theres a black GA70 that i believe it says 1G head a 1JZ block. Can this be done?

 

[starscream5000]

Never heard of it over here in the US as there's maybe a handfull of 1G's in the nation here, but that doesn't mean it can't be done.

Does the 1J head not flow as well? I thought I had "heard" that the 1J head flows about as well, if not a little better, than a 2J head... Could be a myth though... :dunno:

 

[csnow]

Never heard of it over here in the US as there's maybe a handfull of 1G's in the nation here, but that doesn't mean it can't be done.

Does the 1J head not flow as well? I thought I had "heard" that the 1J head flows about as well, if not a little better, than a 2J head... Could be a myth though... :dunno:

There was a good thread on SF on the 1J/2J flow. If I recall, the 1J head did not outflow the 2J head.


EDIT

Here is the post

http://www.supraforums.com/forum/showthread.php?t=339560&highlight=1JZ+head+outflows

 

[OneJoeZee]

Can this be done, im reading one of those hyper rev mags and maybe i translated incorrect as my japanese isnt as good as it used to be, but theres a black GA70 that i believe it says 1G head a 1JZ block. Can this be done?

Which issue and what page?

(I have all 3. I'd like to look at it.)


Even without looking at the book, don't count on it. Different engine family, different dimensions.

The JZ has a bore of 86mm. The 1G has a bore of 75mm.



Still interested in which book and page you saw this one though. Let me know.

 

[starscream5000]

There was a good thread on SF on the 1J/2J flow. If I recall, the 1J head did not outflow the 2J head.


EDIT

Here is the post

http://www.supraforums.com/forum/showthread.php?t=339560&highlight=1JZ+head+outflows

I don't go to that site, sorry .

 

[JDMMA70]

Which issue and what page?

(I have all 3. I'd like to look at it.)


Even without looking at the book, don't count on it. Different engine family, different dimensions.

The JZ has a bore of 86mm. The 1G has a bore of 75mm.



Still interested in which book and page you saw this one though. Let me know.

Ah correction i think i did misread it. Ill have my dad take a look at it when he gets home but i believe its saying 1G and a 1JZ clutch housing. Sorrry guys but still maybe with some fudging it can be done
Issue 3 Vol 70
Page 154

 

[GrimJack]

Here is the post in question:

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