Whats the best combo out of these?

[Jeef]

I have three d series engines at my disposal. The 89 d16a6 in my crx, a 93-95 d16z6, and a 00 d16y8 (it needs to be rebuilt, hopefully the block and head are in good condition). What would be the best head/ block combo? I want to run higher comrpession, probably no higher than 12.5 I will probably end up running zc pistons and rods, but am open to other suggestions. This is going to be my daily driver, so it needs to be streetable. I would not like to touch the a6 motor unless it is the best block to start with, as I would like to do a direct swap to save down time, and build a panda motor out of it for futrue use. I am probably going to go with a mild street cam and aftermarket springs and valves if required. I am trying to stick on a budget. Any sugguestions?

 

[MaaseyRacer]

I would run any of the blocks with ZC pistons, with either the z6 or y8 head, I do not think it makes that much of a difference, although some one might be able to prove me wrong. However i would definatly run the y8 intake manifold, I was debating putting that intake manifold on my N/A 1.5l, but I gave up on the project to get my B16 going.

 

[NoJokE]

D-Series Bible

 

[posol]

y8 head and y8 IM are the way to go.

the rest of the blocks are pretty much identical as for as size and shape are concerned

 

[phunky.buddha]

The D16A6 has twice as many oiling passages for the crank compared to the Z6 and Y8 so it's better lubed, but that's a minor issue... most everything else is the same.

 

[handlebarsfsr]

id go with the y8 head, it has quench zones unlike the other d series heads, which will help keep detonation down at that high c/r.

 

[Jeef]

Cool, I think that I am going to just build the y8 block and head, if its rebuildable. I could then sell the z6 to buy more parts with. Also I won't have to worry about engineering the distributor. I think that I am going to use a vtec controller with the a6 ecu. I would do a mini-me with the a6 block but I dont want the down time. Now to figure out which engine combo I want to use.

 

[phunky.buddha]

Rebuild the Y8... you'll get the highest compression because you'll be using the smallest OEM D series combustion chambers.

Combo- I would drop in the DOHC ZC pistons, a Crower stage 3 cam with matching valvetrain upgrade, port/polish by someone good, then tune the hell out of it.