Early Vs Late GTE Blocks

[IJ.]

Block differences are in the pics below click them to enlarge I've written what to look for on em, the light block is an 87T the Heavy is my New 93T from Toyota.

Heavy


Light


Heavy


Light


Crank differences.

6m


7M


#16 Head

[Nick M]

How about the 12 or so castings for the head?

[87M-GTE]

Ian, your a BEAST
Cool thread btw.

Sam

[IJ.]

How about the 12 or so castings for the head?

Only have pics for a couple of different one's Nick, my last head was a "#16" and the really early ones were unnumbered so there are a least 17 revisions.

Ian, your a BEAST
Cool thread btw.

Sam

Figured it'd be a good thing to sticky while it was on my mind

[87M-GTE]

Only have pics for a couple of different one's Nick, my last head was a "#16" and the really early ones were unnumbered so there are a least 17 revisions.

A sticky regarding the cyl head differences would be cool too.
Also the casting number info and what not..

Great job Ian!

Sam

[IJ.]

Main differences are the Intake dividers Sam, most of the other changes are running changes not performance based.

Would need to flow both types to understand if one is better than the other but I suspect the runner change is more an emissions thing.

[Nick M]

Only have pics for a couple of different one's Nick, my last head was a "#16" and the really early ones were unnumbered so there are a least 17 revisions.

I was only joking about posting all the heads. I have seen a few castings here and there posted. Like the divided runner and open. One of them was a number 9, but I couldn't tell you which.

[whitemike]

Is this looking like the 'wider rail' ?



---------- Post added at 02:13 PM ---------- Previous post was at 02:09 PM ----------

So It's only got extra ribs on ONE side? I was confused looking @ these two pics..

Extra ribs:


No extra:


Safe to say I have the later block? It came with a 6m crank in it but I suppose the guy I bought it from could have done that.

[IJ.]

I was only joking about posting all the heads. I have seen a few castings here and there posted. Like the divided runner and open. One of them was a number 9, but I couldn't tell you which.

Ahhh thought you were being serious due to the lack of a !

Is this looking like the 'wider rail' ?


[/COLOR]So It's only got extra ribs on ONE side? I was confused looking @ these two pics..

Extra ribs:

No extra:


Safe to say I have the later block? It came with a 6m crank in it but I suppose the guy I bought it from could have done that.

Yes that's a Late block, the only differences are as noted in my pics in post #1, they were all taken on the same night as I had both blocks on stands just before assembly so we were able to examine them carefully.

[Heavy D]

nice thread keep it up, i remember some corolla motors are like that, like the 4afe, and the 7afe, 7a has more ribs, good motors to make a GE out of it