what is the difference between a d16z6 and a d16y8 piston? they have a different part number for forged ones.


I have some 9.1 to 1 compression d16y8 srp pistons, what will the compression be If I put them in my d16z6?

 

ttt

 

Bump for another 91 crx dx auto owner.

 

http://www.knology.net/~jediklc/D.htm

 

yeah , but its not a stock y8 piston its a forged 9to1

 

it wont work, well, it would go together, but you will have like 4.0:1 compression cuz the piston to deck height is going to be -.5"...... that was easily figured out w/ the calculator by the way.

 

http://www.heeltoeauto.com/tec...shtml

 

healtoe site says the compression height is about the same, the total height dosn't matter because the forged are shorter than stock pistons, I compared my old cp pistons for a z6 with the y8 srp pistons and from the wrist pin up it looks like the same height.

so it should be real close to 9to 1?

 

dude, did you think i was lying to you, go ahead and build it with those pistons, and watch it not run. point is any piston designed for the y8 isnt going to work in a z6. the compressed height stock is .5" shorter on the y8 pistons, dish/dome has nothing to do w/ it.

 

I took some pics comparing the z6 cp's and the y8 srp's dosn't look like .5" to me im confused.

on the last pic I put the wristpin thru both to see exactly the difference in height.

 

hmm, all i can tell you is that the pistons made for a y8 are not compatible for pistons built for a z6. there is no way at all it can work. pistons manufacturers dont change the size of the piston to determine CR they change the dome. i would say both sets of pistons you pictured are for the same motor.

 

its a difference of .5 milimeter (not inch) next to nothing

 

ah, maybe so.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alexsracing &raquo;</TD></TR><TR><TD CLASS="quote">its a difference of .5 milimeter (not inch) next to nothing</TD></TR></TABLE>Yup. Got dem units straight.

 

according to the calculator though, that .5mm in piston to deck clearance = over 5.0 in compression, unless im pluggin something in wrong.