are the pistons the same could you put wiseco d16y8 pistons in a d16z6

 

As long as the bore is the same, it should work

 

what about the compression?

 

i think their the same comp but it depends if the head has been miled then it could bump up the comp

 

its gonna have just a stock head just 3 angle vj with supertech valve springs and retainers and a crower stage 2 cam

 

between the two motors the c/r stock is .4 difference and the d16y8 has the higher compression at 9.6:1, what is the c/r of the pistons you have

 

arent the lengths of the rods just a little different? which will change the compression a little bit. also what kind of head are you running?

 

Rod length are the same at 137mm

 

i was going to get the 8.5:1

 

the rods both have the same part number and the z6 head

 

should be just fine as long as the bore is the same and the compression.

 

i do not want to comment on aftermarket pistons, but...

stock, the pistons are different, yes.

however, if you took a stock z6 and solely swapped the pistons with those from a y8, you'd see a negligible bump in compression, about .15 points.

keep in mind the combustion chamber between both heads is different in shape and volume. the y8 head has a combustion chamber that is almost 2cc smaller...

if i were you, using aftermarket pistons, i'd use this and pay special attention to the note underneath the piston to deck height section - http://www.knology.net/~jediklc/dcalc.htm

 

wouldnt that give me less compression in a z6 since its bigger?

 

wouldn't what give you less compression? i'm not following what you mean.

and honestly it is simple with that link i sent you to find out exactly what your compression will be using any combo of parts and whatever pistons, even aftermarket. the only thing you need are the specs of the pistons from wiseco (actually only the compression height to verify the piston to deck clearance)