Already searched! Is there a difference?

 

Of course.

Z6 is obd1

Y8 is obd2

I think redline is different, and for the trannys i believe that the Z6 is shorter.

 

Thats what I thought. Thanks alot. I was wondering if the comp was different or there was a difference in the head or something.

 

y8 puts out 2 more hp and 1 more ft lb torque, the y8 has a 9.6:1 CR, z6 has 9.2:1.

 

Damn the z6 is 9.2:1 CR? That sounds good for turbo. Can someone back that up?

 

Heads are different, pistons are different, cams are different, distributors are different, oil pans are different...they don't share any parts except for the T-belt and block

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Luserkid &raquo;</TD></TR><TR><TD CLASS="quote">Damn the z6 is 9.2:1 CR? That sounds good for turbo. Can someone back that up? </TD></TR></TABLE>

what... you callin me a liar?

All the back up you could ask for:
http://www.hondaswap.com/forum...29825

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by revolution8k &raquo;</TD></TR><TR><TD CLASS="quote">

what... you callin me a liar?

</TD></TR></TABLE>

Liar was such a harsh word I just never knew so ill call you a informer (if thats a word)

 

WOW...people don't F*&& around in this forum.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nathan atwell &raquo;</TD></TR><TR><TD CLASS="quote">WOW...people don't F*&& around in this forum. </TD></TR></TABLE>

If you only knew

 

Okay, here's what I know.

Blocks are the same, same bore/stroke/rods
Oil pans are different
Both trannies have the same gear ratios, but the Y8 has stronger shift forks
Z6 redlines at 7200, Y8 at 7000
Z6 has 125 hp, Y8 has 127 hp
Y8 head has a smaller, square combustion chamber
Z6 head has a larger, round combustion chamber
Z6 head flows better
Y8 IM flows better
Z6 has larger dished pistons (i'm pretty sure)
Y8 is 9.6:1, Z6 is 9.2:1
Y8 is obd2, Z6 is obd1
Distributor bolt patterns are different
Y8 has a knock sensor
Y8 has a slightly more aggressive cam
Y8 cam gear is about 5 degrees off from the Z6 gear (which is straight up)

Thats all I can think of for now

 

Isnt the headgasket of the y8 thinner as well?

 

Can we also discuss the D15B?

 

no the head on the y8 is thicker

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jerbear! &raquo;</TD></TR><TR><TD CLASS="quote">Isnt the headgasket of the y8 thinner as well?</TD></TR></TABLE>

No, it is full metal while the Z6 is a composite.

 

Z6 Headgaskets should be discontinued by now.
Last 3 I have ordered all came same as the Y8 3 layer.

Bauley, how do you like the Greddy kit.

 

The greddy kit is pretty damn nice IMO. Wait, you didn't ask me

 

the y8 has a square combustion chamber as opposed to the z6 circle chamber....try fitting a circle inside a square, don't you have a little extra room left.

long story short....y8 head flows a little better

and yes 9.2:1 is good for turbo

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skunk2eg &raquo;</TD></TR><TR><TD CLASS="quote">the y8 has a square combustion chamber as opposed to the z6 circle chamber....try fitting a circle inside a square, don't you have a little extra room left.</TD></TR></TABLE>

Uh, negative.

Y8


Z6


A6 w/ welded chamber


The squared-off sides of the Y8 makes the combustion chamber smaller, therefore increasing the compression...it is essentially the same thing as having a welded circular chamber.

"The welded chamber decreases the combustion chamber volume and increases the compression ratio of the setup."

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skunk2eg &raquo;</TD></TR><TR><TD CLASS="quote">
long story short....y8 head flows a little better
</TD></TR></TABLE>

No it doesn't.

Quoted from another thread:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by draco067 &raquo;</TD></TR><TR><TD CLASS="quote">I just finished reading a post on the D-series board about this.
Apparently the Y8 head has a curve in one side of the intake ports, allowing for better low- and mid-rpm swirl, while the Z6 has equal-length and size ports to promote high-rpm flow. The Y8 also splits the port farther back than the Z6. It was noted, however, that unless you're pushing massive power, the flow characteristics aren't that different, so you won't notice any appreciable difference. </TD></TR></TABLE>

 

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

No, it is full metal while the Z6 is a composite.</TD></TR></TABLE>

actually, the z6 and y8 head gasket has the same part number, and they are all MLS.

 

block is different too, y8 has the dipstick in the oil pump and z6 has it in the front of the block. i think they only share the water pump, t-belt, cranks, and valves/springs/retainers. they're pretty similar over all

 

redline on a y8 is 7200 not 7000. I should know, I get up there alot.

 

from my knowledge,
the gearing in the transmissions are the same,
only diff is the y8 has some steel part that the z7 has in aluminum... ppl like that for durability or somethin.. forget what part though.

oh and the folk over at dseries.org prefer the z6 intake mani and have found it to flow better on the top end.

even though the general masses think the y8 is better cuz it LOOKS like it should be

 

can u rock a z6 tranny on a y8 and vise a versa....?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by steve123 &raquo;</TD></TR><TR><TD CLASS="quote">

D16Z6 is the 92-95 civic SI Engine. </TD></TR></TABLE>

and the 92-95 EX coupe and sedan motor