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MustangCRZY302
11-10-2008, 11:35 AM
What do these codes me on top of the Block? In the lifter valley? I can't find the answer anywhere!I have XXX, and my buddy has YYY? the blocks look the same to me?? Anybody know?
Silver91Hatch
11-10-2008, 07:25 PM
I THINK one it mustang block and the other is Crown Vic, etc, but I'm not 100% sure.
wilsmoku
11-10-2008, 07:28 PM
i believe the x blocks were to be stronger and have thicker web in the botom round the main caps
nastynotchback1
11-12-2008, 02:10 PM
As far as i know the xxx is a truck block and not any stronger.
bags50lx
11-12-2008, 08:15 PM
My old mustang had the xxx on it and it was the original motor. But it did hold over 600rwhp for a couple of months with the turbo then gave it to a friend and he put a ysi on it and it lasted 1.5 years running 9.4's. I dont think there is a difference in the blocks.
Notch93
11-12-2008, 08:49 PM
As far as i know the xxx is a truck block and not any stronger.

My friends stock 92 mustang motor that was taken apart 6 months ago had XXX. Are you sure the truck blocks weren't YYY?

The casting code should read E5AE,E5TE,E6AE,E7TE or E7AE. Which are all roller blocks. Basically they are the same.
nastynotchback1
11-14-2008, 11:29 AM
My friends stock 92 mustang motor that was taken apart 6 months ago had XXX. Are you sure the truck blocks weren't YYY?

The casting code should read E5AE,E5TE,E6AE,E7TE or E7AE. Which are all roller blocks. Basically they are the same.


You may be right.it might be the yyy in trucks.I am not 100% sure on the info.Just something i have heard.
tiptopss
11-14-2008, 10:48 PM
maybe the xxx blocks, were featured in porno movies, hahahaha