egturbo

ok. imma have to use my y8 head on my z6 block. i've been lookin for a z6 head forever can't find one for a good price so i might just have to use my y8 head.

oh and can i use a z6 sohc vtec skunk2 cam gear on a y8?

the thing is i got the z6 arp headstuds and z6 headgasket. is there any way i can use my y8 head?

what good/bad will the y8 do my built z6 block? will be boosting at 10-15 psi. i need to know asap. cuz doin the swap this sat. if the y8 isnt gonna be good for turbo then imma have to buy a z6 head. let me know guyz THANKS ALOT.

can i use my used y8 headgasket? only has 2k miles on it.




Modified by egturbo at 12:06 AM 6/13/2004


Modified by egturbo at 11:17 PM 6/13/2004

GSRswapandslow.

the y8 head is CRAP comprared to the Z6, plain and simple

the y8 head will also give you a slightly higher compression

and just copper spray the headgasket and it'll be perfectly fine

egturbo

damn thats what i didnt want to hear imma try to look for a z6 head.

fastcivicboy

I have 2 z6 head's. I will let one of them go cheap if you want it. Hit me up on my e-mail at fastcivicboy@hotmail.com if ur interested. Nick

egturbo

pm'd

Pengo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRswapandslow. &raquo;</TD></TR><TR><TD CLASS="quote">the y8 head is CRAP comprared to the Z6, plain and simple

the y8 head will also give you a slightly higher compression

and just copper spray the headgasket and it'll be perfectly fine</TD></TR></TABLE>

where did you hear this? i know about the higher comp but the y8 head is supposed to flow better than the z6 head...

M.A.R.C.

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

where did you hear this? i know about the higher comp but the y8 head is supposed to flow better than the z6 head...</TD></TR></TABLE>

someone actually flow benched a home ported y8 vs a stock z6 and the y8 minimally out flowed it. ZEX Man lost a shitload of peak whp on his race car with the y8 head vs a z6. the midrange was better though he said. it's the actual y8 intake manifold that is better than the z6

Pengo

yea the intake mani is def better. i think the z6 flows better at high rpm high hp apps which is where the y8 falters i suppose. supposedly the design of the y8 head makes it less prone to detonation, but in the case of a boosted sohc you mite not want the increased comp. unless you run 9:1 pistons and wanna run closer to stock comp, cuz i know those stock comp forged pistons are hard to find for the sohc

M.A.R.C.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Pengo &raquo;</TD></TR><TR><TD CLASS="quote">yea the intake mani is def better. i think the z6 flows better at high rpm high hp apps which is where the y8 falters i suppose. supposedly the design of the y8 head makes it less prone to detonation, but in the case of a boosted sohc you mite not want the increased comp. unless you run 9:1 pistons and wanna run closer to stock comp, cuz i know those stock comp forged pistons are hard to find for the sohc</TD></TR></TABLE>

that's what it's shown to be like. i have a y8 head on my z6 block with 9:1 forged pistons. so the cr should be up around 9.4-9.6:1. u can get close to stock cr forged pistons i'm sure they're probably just not shelf pistons

egturbo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CivicRyda2k &raquo;</TD></TR><TR><TD CLASS="quote">

that's what it's shown to be like. i have a y8 head on my z6 block with 9:1 forged pistons. so the cr should be up around 9.4-9.6:1. u can get close to stock cr forged pistons i'm sure they're probably just not shelf pistons</TD></TR></TABLE>

i have forged pistons but dont know the cr of them their hella dirty when i bought the block but i cleaned them up nice and shiny i need to know what head to use or what head would be best for me by wendsday doing swap on sat

GSRswapandslow.

the z6 outflows the y8 everywhere it matters...mid/higher lifts

pip9

I have two z6 heads laying around. Where are u located? I have a y8 head on a z6 block. I used the y8 headgasket (its was 1/2 the price of the z6 one), and the arp y8 headstuds i believe.

egturbo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pip9 &raquo;</TD></TR><TR><TD CLASS="quote">I have two z6 heads laying around. Where are u located? I have a y8 head on a z6 block. I used the y8 headgasket (its was 1/2 the price of the z6 one), and the arp y8 headstuds i believe.</TD></TR></TABLE>

damn im using the z6 headstuds u got pm

RyanEJ8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GSRswapandslow. &raquo;</TD></TR><TR><TD CLASS="quote">the z6 outflows the y8 everywhere it matters...mid/higher lifts</TD></TR></TABLE>

I disagree. The Y8 head actually has quite a few advantages. It has a squared off combustion chamber that increases compression and larger quench pad areas to help reduce detonation. The Y8 port divider is also farther back in the head which gives it more port volume and less divider surface area to slow airflow. The one disadvantage the Y8 head has in comparison with the Z6 is the curved divider. The curved divider is used to improve fuel economy, but causes some loss of power at high rpm.

M.A.R.C.

use the z6 if u can. i had to use my y8 because i had it laying around in my garage

egturbo

can i use the z6 skunk2 cam gear i bought for the z6 for the y8 head though?

peiku

yes, all sohc cam gears are the same. i think that the z6 distributor will not line up with the y8 head tho. you will have to take this into consideration.

egturbo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by peiku &raquo;</TD></TR><TR><TD CLASS="quote">yes, all sohc cam gears are the same. i think that the z6 distributor will not line up with the y8 head tho. you will have to take this into consideration.</TD></TR></TABLE>

kew. im using a obd1 dizzy on the y8 right now. timing off though. can't time it right for some reason.

SOHC_MShue

the z6 dizzy definantelly won't line up. Also not all sohc cam gears are the same. Some specifically made for the y8 have the keyslot advanced about 4.5 degrees. If you use a z6 cam gear you will need to advance the cam 4.5 degrees to get it to line up correctly. Most sohc cam gears are all setup like the z6 cam gear though. Only exception i know of is aem which actually makes a y8 gear with the keyslot advanced.

egturbo

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">the z6 dizzy definantelly won't line up. Also not all sohc cam gears are the same. Some specifically made for the y8 have the keyslot advanced about 4.5 degrees. If you use a z6 cam gear you will need to advance the cam 4.5 degrees to get it to line up correctly. Most sohc cam gears are all setup like the z6 cam gear though. Only exception i know of is aem which actually makes a y8 gear with the keyslot advanced.</TD></TR></TABLE>

damn. thats gonna suck for me cuz at 15 psi imma HAVE to set the timing exact

AzCivic1.6

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RyanCivic2000 &raquo;</TD></TR><TR><TD CLASS="quote">

I disagree. The Y8 head actually has quite a few advantages. It has a squared off combustion chamber that increases compression and larger quench pad areas to help reduce detonation. The Y8 port divider is also farther back in the head which gives it more port volume and less divider surface area to slow airflow. The one disadvantage the Y8 head has in comparison with the Z6 is the curved divider. The curved divider is used to improve fuel economy, but causes some loss of power at high rpm.</TD></TR></TABLE>

i think your just biased cause you have the y8

M.A.R.C.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue &raquo;</TD></TR><TR><TD CLASS="quote">the z6 dizzy definantelly won't line up. Also not all sohc cam gears are the same. Some specifically made for the y8 have the keyslot advanced about 4.5 degrees. If you use a z6 cam gear you will need to advance the cam 4.5 degrees to get it to line up correctly. Most sohc cam gears are all setup like the z6 cam gear though. Only exception i know of is aem which actually makes a y8 gear with the keyslot advanced.</TD></TR></TABLE>

that's correct. i dunno bout obd1 dizzy on y8 head, but i know you can actually use the y8 dizzy on the z6 head (i've done it). i cut a slit into the top mounting hole
and the bolt that holds it in sat somewhere in the slit. if my cam worked i'd take pix. it's ghetto rigged... but it worked fine for me. oh well no more z6 head... i'm back to a y8


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AzCivic1.6 &raquo;</TD></TR><TR><TD CLASS="quote">

i think your just biased cause you have the y8 </TD></TR></TABLE>

he's actually right hehe

RyanEJ8

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AzCivic1.6 &raquo;</TD></TR><TR><TD CLASS="quote">

i think your just biased cause you have the y8 </TD></TR></TABLE>

That is probably part of it.

I've considered switching to a Z6 head for the high end flow though.

egturbo

damn i can't find a z6 head for a good price. imma have to use my y8 what do i do bout dizzy? do i use my obd1 dizzy? im using it right now on the y8 and timing is very off. what can i do?

pip9

if u use the y8 head i would recommend using the obd2 dizzy. I got mine for about $150 at the junkyard. Im sure u could find it cheaper though. Just take all the pins out of the one plug on the obd2 dizzy and replug the obdII dizzy with 2 plugs for the obdI. Just make sure u match up the correct colors.