Yes guys i have searched already. There is nothing archived regarding a z6 head on a y7 block, so put the flamethrowers down, here are my questions:

Would a z6 head on an y5 block be a straight mini me swap.. like a z6 head on an y7 block..?

Since the hx is already wired for vtec, am i gona have to re-wire regardless? i have a p28 ecu with a OBD2 to OBD1 jumper harness already.

This is my DD so im not trying to do anything fancy per say a b series swap or anything regarding those maters. Thanks in advance for your help.

-esco

 

https://honda-tech.com/zerothread?id=554053
Just follow that walkthrough it is the same concept.

 

would this be the same as a y8 head on a d15 block, or would it be better to find a d16 block?

 

Thats a really good write up, but i want to know more about the vtec wiring part. Since i know the hx has the vtec wired in (its a different v-tec) is it just as simple as plug n play.?

 

Your Hx wriring harness should work fine I know the Z6 has a bastard child type dizzy. Im not sure if the plug is the same for the harness you will have to look that up but VTEC is VTEC and you will be fine wiring wise.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jakedoza &raquo;</TD></TR><TR><TD CLASS="quote">would this be the same as a y8 head on a d15 block, or would it be better to find a d16 block?</TD></TR></TABLE>
You can mate the 1.6 head on the 1.5 block my advice would to have the existing block bored out to a 1.6 but its not needed.

 

gotcha... cool.. thanks

This is a block I'm going to build.. so would you suggest maybe even going bigger than a 1.6?

I'm looking at Eagle rods, Vitara pistons, and ARP studs... and I'm still questionable about what crank to use.. because I have the d15 crank, but it needs to be micro polished.

 

Unless you plan on an Excessive amount of compression or boost the D15 crank should be fine just clean up the crank and get it micro polished. Before you reinstall it check it for any distortions or hairline fractures as they will lead to major problems down the road. As for going bigger than a 1.6 that is all up to you and what you are looking for. Just remember the larger you go the thinner the walls get so if you get them boredyou should get the motor sleeved while it is apart to keep you from any headaches. If you go larger than 1.6 Im not sure if you are going to have to get the head milled or not to the same size as the cylinders but if you ask bauley or someone else they should know im still doing research on what my course of action is. Im running a complete y8 though so it will just be a complete overhaul of the existing engine no vtec head matching for me. You can go with a different crank but im not sure what your options there are I do know that some cranks have a longer stride therefore upping compression. As to which up and how much I dont know ill have to look around. that setup is good for starters it seems alot of people are using vitara or crower pistons and I myself will most likely be going vitara

 

my aim is around 350 - 400 whp and yeah.. a ton of boost to do that as well as a good tune. If a y8 crank will be better, then I need to find one. Now that you said that about the boring, I probably will not since we all know that heat is the enemy. I've heard good and bad things about installing a block guard but more bad things about it. what's your opinion?

 

the y5 head is better than the z6 head to begin with...why would you swap it?

 

just swap the cam + rockers

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by speedooo &raquo;</TD></TR><TR><TD CLASS="quote">the y5 head is better than the z6 head to begin with...why would you swap it?</TD></TR></TABLE>

Nah man, mpg wise the y5 head is better. Performance wise the z6 head is better any day. vtec&gt;vtec-e. Im not lookin for mpg, im lookin for more performance.

 

you'll get more acceleration when you get rid of that hx trans.

ex trans on an hx is more effective than a ex head.

PS: No wiring issues with a trans.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">you'll get more acceleration when you get rid of that hx trans.

ex trans on an hx is more effective than a ex head.

PS: No wiring issues with a trans.</TD></TR></TABLE>

Ok so let's say i leave the head alone, and i run a p28 with the ex trans (i have both already) Won't i be running 8 valves up untill the p28's vtec crossover point?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by esco562 &raquo;</TD></TR><TR><TD CLASS="quote">

Ok so let's say i leave the head alone, and i run a p28 with the ex trans (i have both already) Won't i be running 8 valves up untill the p28's vtec crossover point?</TD></TR></TABLE>

Correct. the p28 will make your d16y5 run like ****.

The P2N ecu or whatever the thing is will run best with your engine. The d16y5 is only 12 hp less than a d16y8. There are no obd1 equivalents to the D16y5. There's the d15z1, but it's 92 hp and it has very tiny ports. The d16y5 shares the same head casting as the d16y8

The d16y8 and the d16y5 share the same valves also. The cam + rocker assemblies are different and they can be swapped.

The Hx is also significantly lighter than a heavy ex coupe. There are a few threads on here that state that a HX with EX trans is faster than a EX.

EX trans on HX =

 

Can you use a y8 cam in a y5 head and leave it at that?

 

if you use the y8 rockers

here's a y5 rocker assembly

 

d16y5 tech
http://www.sohchonda.com/forum...st=20

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">

Correct. the p28 will make your d16y5 run like ****.

The P2N ecu or whatever the thing is will run best with your engine. The d16y5 is only 12 hp less than a d16y8. There are no obd1 equivalents to the D16y5. There's the d15z1, but it's 92 hp and it has very tiny ports. The d16y5 shares the same head casting as the d16y8

The d16y8 and the d16y5 share the same valves also. The cam + rocker assemblies are different and they can be swapped.

The Hx is also significantly lighter than a heavy ex coupe. There are a few threads on here that state that a HX with EX trans is faster than a EX.

EX trans on HX = </TD></TR></TABLE>

Ok i think i see your point. Then there would be no point really in swapping my y5 head for a z6 head right? My best bet would be to run the manual p2n ecu than the p28? On the other hand lets say i ditch the y5 head and install the z6 head and run the p28 ecu with the ex tranny just so i wouldn't have to worry about the low vtec-e crossover point from the hx, would i essentially have a a d16z6 or d16y8 per say that would run like a normal sohc vtec motor with a higher crossover point..? sorry for the run-on sentences hah

 

but is it really worth swapping cylinder heads, ecus, wiring harness, converting the z6/z6 dizzy to obd2 all for 10 hp?

You'd be better off just getting a 4.7 or 4.9 final drive for the ex trans.

 

U make a really good point Bense. I also clicked on the link u posted wich has alot more info regarding the sohcs. Ima be reading up on that info aswell. Also is the ex tranny marked s40? Thanks alot for your help Bense.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by esco562 &raquo;</TD></TR><TR><TD CLASS="quote">U make a really good point Bense. I also clicked on the link u posted wich has alot more info regarding the sohcs. Ima be reading up on that info aswell. Also is the ex tranny marked s40? Thanks alot for your help Bense. </TD></TR></TABLE>

ex tranny 90% of the time has the b000 stamp.

s40 means 96-00 d-series
s20 means 92-95 d-series


b000 near the trans fill plug means big bearing case

big bearing cases are used on 92-95 ex and si
96-00 ex
it is also found on 96-00 HX's.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bense &raquo;</TD></TR><TR><TD CLASS="quote">

ex tranny 90% of the time has the b000 stamp.

s40 means 96-00 d-series
s20 means 92-95 d-series


b000 near the trans fill plug means big bearing case

big bearing cases are used on 92-95 ex and si
96-00 ex
it is also found on 96-00 HX's.</TD></TR></TABLE>

Hmm ill look into that.

 

No wonder u told me not to ditch the y5 head, i just read a ton of your threads regarding your builds. They are ******* great. It all makes sense now. U think if i get an vafc, lower the vtec cross-over point and run the p28, would my engine would still run like ****?

 

Not sure what the wiring is like on the HX...

Follow lilloweks write up on JDMU or whatever its on.

Differences with a Z6 head on a Y block. Vacuum and collant lines. You'll have to block some unless you swap the waterneck over from a Z6. Timing. Y runs on 12*, Z6 runs on 16*. Use a protractor and make a 16* mark on the CP, set timing here versus stock 12* mark. You'll have to pull the wiring out of the loom for some of the sensors. Any problems with it just post up. I had all the problems you could have when I put a Z6 head on my Y7.