can anyone list the differences in the y8 block vs. the z6 block? basically i have a z6 in my 93 civic and was also wondering if it ever decides to blow if i could use my y8 block i have sitting here?

 

someone has to know if i could stick a y8 block in my 93 hatch if i ever need to..

hell i have a y8 head and tranny in there now..

 

yeah i have a hole y8 in my 93 all i did was use the z6 intake mani and tb...

 

i know it will probably work just fine, but id still like to know the differences between the blocks. i already know the differences between the heads, tranny's, and im's, etc..

 

https://honda-tech.com/zerothread?id=1403258

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Gordon Liddy &raquo;</TD></TR><TR><TD CLASS="quote">https://honda-tech.com/zerothread?id=1403258</TD></TR></TABLE>

yes i seen that but no where in that thread does it list any one difference between the blocks. so i dont see how it relates to this thread.

 

Y8 is better

 

A6 is best.

 

the y8 pistons have higher compression, thats as far as i know

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sockvtec &raquo;</TD></TR><TR><TD CLASS="quote">the y8 pistons have higher compression, thats as far as i know</TD></TR></TABLE>

you sure its the pistons. its the head that causes the higher compression.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh &raquo;</TD></TR><TR><TD CLASS="quote">

you sure its the pistons. its the head that causes the higher compression.</TD></TR></TABLE>

The pistons also contribute to compression being different heights, also the head gasket can alter compression slightly.

I belive the y8 is ob2 and the z6 is obd1 if that makes a difference.

 

still though, what EXACTLY is different between the two? complete casting different? rods? pistons? oil pump? waterpump? timing belt? crank?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mike93eh &raquo;</TD></TR><TR><TD CLASS="quote">still though, what EXACTLY is different between the two? complete casting different? rods? pistons? oil pump? waterpump? timing belt? crank?</TD></TR></TABLE>

good luck, nobody has ever been able to answer that for me

 

I know there is a different oil pump in them. supposedly the z6 has a greater flow rate than the y8.

I do believe that the rods/pistons are different, but overall are the same size.

They have different oil pans.

I believe that the blocks are pretty much different in almost every aspect, except that they're interchangeable. You can put a y8 head on a z6 block and a z6 head on a y8 block.

but basically once you get down to it, the oil pump is the real difference. everything else is different, but the blocks outter dimensions are the smae.

hope that helps alittle.

 

the intake manifold is different the air passes in different ways and the piston size is also different not by much but by enough that is it also the y8 gets 40/47 city/highway gas miles compared to the 29/36 the z6 has i would never use a y8 if my z6went but that would never happen

 

nevermind, just got a complete running 93 si CHEAP. gonna use it for parts and part it out..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eghatchattax822 &raquo;</TD></TR><TR><TD CLASS="quote">the intake manifold is different the air passes in different ways and the piston size is also different not by much but by enough that is it also the y8 gets 40/47 city/highway gas miles compared to the 29/36 the z6 has i would never use a y8 if my z6went but that would never happen </TD></TR></TABLE>

in all the years I have owned my 99 ex. I have never gotten anywhere near 40 mpg, even all highway. the best ever was once I got 35mpg all highway.

 

Y8 won't get near 40mpg, however, my Y5 does, winner is me!

 

since the Y8 block is OBD2, does it have the knock sensor on the back where the Z6 block does not? just a guess...