302 XXX block

[blueblazes]

got a friend with 93 cobra 347 built mexican block with s trim and its stood up to the abuse well.

Ive heard alot of good things about the mexican blocks, from what I understand alot were used in taxis for reliability reasons

 

[The O.G.]

got a friend with 93 cobra 347 built mexican block with s trim and its stood up to the abuse well.

Ive heard alot of good things about the mexican blocks, from what I understand alot were used in taxis for reliability reasons

:OT:



what were your letters xxx/yyy ?

didnt they make blocks in diff factories, canada/u.s.a.?

 

[info_sorb_88]

xxx vs. yyy

the xxx blocks where cast in the USA where as the yyy blocks where cast in Mexico and have a higher nickle content which make them stronger and are popular for forced induction and heavy nitrous applications.

 

[JadeGT]

There is no difference in between the XXX and YYY blocks but you are more than welcome to believe what you want.

 

[Chrome_Rust]

Someone told me that the XXX or YYY castings in the blocks were a place that was prone to cracking or were thin casting in that area. the XXX or YYY was put there to aid in the rigitiititittiiittttyyyyyywhywhywhy (it's 2am, i am tired) of the casting. But i could be wrong. Just a thought to add...\


Charlie

 

[kylem40]

how do I tel if mine is a xxx or yyy

 

[LiquidGT]

Its in the valley, sorry for the tiny pic.
This is an Explorer block, its the XXX... my original '91 block is a YYY.

I dont think there's any difference in the XXX; YYY blocks I wasnt concerned about it when I swapped them. It probably denotes a different casting plant, or casting machine.

 

[kylem40]

ok kewl thanks ill have look at that

 

[Mustang5L5]

**** Star blocks!

 

[strtrcr50]

A mexican block will say hecho in mexico in the lifter valley. Also, they are not roller blocks.