hey guys... Thinking of doing a mini-me and am wondering which head to go with... z6 or y8? Is there a big difference? Should I choose Obd-1 over obd-2? This will go on a d16A6 block. Any help would be appreciated...

 

I just put a sohc vtec motor in my 89 Si, if you use the z6 head you will have problems getting your distributor to work, so I got a y8 head and the obd-0 distributor will bolt right up to it, and ive heard the y8 has a little higher compression then the z6 also, so im gonna say go with the y8, good luck.

 

tell me what you guys think of this set up and let me know if i am missing anything...

D16A6 Block
D16A1 Pistons
New stock Rods
New rings
Y8 head
Skunk2 Cam
Skunk2 Valvetrain
Skunk2 Mani

Also should I do some head work, like port and polish? And which Dizzy and ECU is best?

BTW I did a search and found some good info but not all of what i was looking for...

 

you can get the dizzy onto the z6 by cutting the mounts, but its a PITA and you cant adjust your timing

does the a6 dizzy really just plug right into the y8 head? i thought there were problems with it...if it does just plug right in, i'll get rid of my z6 head and get a y8

 

yes you very well can adjust your timing. you have read some misleading information.

 

Yeah...anyone else think a 13.4:1 compression ratio is a little high?
Because that's the ballpark for a the y8 head, a6 block, a1 pistons, y8 head gasket combination.

A y8 head, a6 block/pistons is going to be around 10.6:1. Then you're going to have to mess with tuning an aftermarket management (NOT easy, regardless of what you read in Stooper Street) or bothering to convert to OBD-1 and running a P28 ecu.

The y8 head will allow the OBD-0 a6 distributor to bolt on.
The z6 head will take a ghettorigged a6 dizzy but if you're converting to OBD-1 it's the perfect choice so you can run a z6 OBD-1 dizzy.

Maybe you're mixing projects with the a1 pistons...
a6 head/block with a1 pistons with a lightly p&p'd head and intake is going to be as fast and probably easier than a mini-me. Run an adjustable FPR and your existing OBD-0 components and you're pretty much done. Roughly an 11.5:1 compression ratio. Put a cam on that and we're a mean little D-series beast.

And what's special about the skunk stuff except the name? The best vtec cam numbers I've seen is the ZEX piece.

If you're going to bother to replace the rods, why stock? And what's wrong with your old ones? I understand they're good to at least 150 hp, if not more.

 

well i wasnt sure about using the A1 pistons... I figured I would do the rods while at it... But if that is what the compression will look like I will keep the botom end as is and this will make my life a lot esier... Now I dont have to pull my whole motor or get a ghinie pig block... I can just swap heads and run vtec right(makes it sound so easy)... Thanks for the info and for setting me in the right path...

 

Actually you can just swap heads and have vtec, and it is fairly easy but if you havent taken the motor apart there is a braket going from the intake manifold to the block you will want to take off, and for vtec you can get a rpm activated switch. Also I have heard you can use a 92-95 fuel pressure regulator or an adjustable one, but I havent really messed with the fuel, but you might want to do some research about that to, good luck.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRX Si &raquo;</TD></TR><TR><TD CLASS="quote">well i wasnt sure about using the A1 pistons... I figured I would do the rods while at it... But if that is what the compression will look like I will keep the botom end as is and this will make my life a lot esier... Now I dont have to pull my whole motor or get a ghinie pig block... I can just swap heads and run vtec right(makes it sound so easy)... Thanks for the info and for setting me in the right path...</TD></TR></TABLE>

definitely a wise choice, stick with the a6 block internals and just swap the y8 head on with a z6 gasket. your looking at a 10.3:1 cr then...pump gas friendly

 

with the money you're going to spend on skunk parts you could buy a B series motor. really

 

I have Z6 head and stock dist. I put 10 mm bolt throught the top hole and a nut on the valve cover side It adjusts and holds fine