what are those hoses called on the back of the manifold (intake mani).....

Also whats the diffrance between d15b7 pistons and d16z6 pixtons ?

 

fuel lines or vaccum lines how about a better description.

 

vaccuum hoes

 

b7 pistons are domed and z6 pistons are dished yO!

 

is that why the z6 makes higher compression ?

 

they are different cc's, the z6 is 34.6 and the b7 is 38cc.

 

so which stock d series pistons yeild a high compression ratio ?

 

just put sand in the intake, when it gets in the combustion chamber it fills up the pistons and makes them higher compresion, not to mention you will also have a nice layer of silicone protection on the top of your pistons

 

pm7's put of a dohc zc or the p29's out of d16a1-8-9, any dohck d16 piston will make high compression in a sohc d motor. why you planning on an all motor build or what?