Check this out...
http://cgi.ebay.com/ebaymotors...74370

Is this foreal? Didn't know that there was a SOHC ZC. Am I a little undereducated?

Someone look into this.
Thanks,
Scott


Modified by CRneXt at 9:09 PM 10/5/2003

 

I have the SOHC ZC sittin on my stand in the garage right now, it was my old motor. And YES, u are a little undereducated. If anyone wants to buy my old SOHC ZC swap, PM me. It comes with all kinds of extras.

 

Welcome to the wonderful world of japanese imported motors, i have a single cam ZC in my 4g hatch. got it from K. Wantanabe motors. When I trashed my stock motor I resorted to buying one. I asked for a D16A6, this is what i got. On the block its just says ZC<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CRneXt &raquo;</TD></TR><TR><TD CLASS="quote">Check this out...
http://cgi.ebay.com/ebaymotors...74370

Is this foreal? Didn't know that there was a SOHC ZC. Am I a little undereducated?

Someone look into this.
Thanks,
Scott


Modified by CRneXt at 9:09 PM 10/5/2003</TD></TR></TABLE>

 

well i got a dual cam zc and for some reason it pulls only after 4000rpm i can't figure out what is wrong oh well b16 is coming in a couple weeks .... well if anybody has any info on this problem ...please reply

 

OK, then. I now have a new avenue to explore intellectually. This could be fun... I like what ifs, and maybes. Thanks all for the enlightenment.

Scott

 

The SOHC ZC is exactley the same as the USDM D16A6 (usdm 89-91 Si). The only diffrence is the stamp on the block.

 

Doesn't the JDM version have a little more power? I thought it was like 115 hp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr. S &raquo;</TD></TR><TR><TD CLASS="quote">Doesn't the JDM version have a little more power? I thought it was like 115 hp.</TD></TR></TABLE>

you are correct, nothing to bitch about, mine seems to have come with larger injectors. The car ran extremely rich before I added the DualCam ECU to the single cam motor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90Sicvic &raquo;</TD></TR><TR><TD CLASS="quote">mine seems to have come with larger injectorshonda: </TD></TR></TABLE>

I doubt it. Most Honda injectors of these years are the same. D16A6 and B16A injectors are the same. I think the power comes from higher comp. and a better cam.

 

the jdm sohc Zc is similar to the d16a6 almost the same besides more wilder cam and 9.1 compression 120hp 100tq strong motor

 

I have one with I/H/E, clutch, Skunk 2 manifold and a catco cat. It PULLS! The manifold made a HUGE difference, but even without it and the cat, it still pulled WAY harder than my old A6

 

Actually, the JDM sohc ZC from 1988 was rated at 120PS. That would be about 118Hp. Let's stress the difference between PS and Hp ratings.

And while we're on the subject of correct ZC output. The dohc zc from the same year made 130PS. So 128ish Hp....Not 130 or 135Hp that frequently gets quoted.

And one to really bend your mind: The browntop ZC from the previous year made 135 PS. So the older engine made more power...really makes a good argument for putting a browntop into a 1985 si.

This is all according to the Honda Press Information archives.
http://www.honda.co.jp/factboo....html

I couldn't find compression ratios, but they're in there somewhere.

btw...thanks for advertising the auction I was hoping to participate in.

 

Have you double and triple checked the cam timing? If you have a NON-HONDA OEM belt they can jump time reasily. A mistimed cam can easily do that, Mine pulls hard from around 3k and just keeps pulling harder right up to redline without letting up.

 

I've always heard "you don't want the browntop" when people talk about ZCs. is there a reason for this? or is it just cause it's older and has more issues due to age?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IggDawg &raquo;</TD></TR><TR><TD CLASS="quote">I've always heard "you don't want the browntop" when people talk about ZCs. is there a reason for this? or is it just cause it's older and has more issues due to age?</TD></TR></TABLE>

Exactly.

Also, the SOHC ZC had domed cylinder heads too if I'm not mistaken? I probably am, but that would explain more HP as well.

 

"that thing got a hemi?"

 

lol... I'm serious. Not that extreme... but they're still domed. I'm pretty sure.... ah well.

 

Browntops has Integra mounts and not honda mounts if I am not mistaken. Blacktops can have either, Makes a big difference bolting one into a honda.

Blacktop DOHC ZC has domed pistons, and superior cams, intake manifold and head compared to the browntop.

 

so does that make the sohc zc a straight plug and play swap, or are there wiring changes

 

Well A DOHC requires minor wiring changes if you have a MPFI car to start with, I started with a DX with DPFI and the wiring took me a few hours but worked first try. Never hooked up a SOHC ZC nor have I seriously researched it, but believe it would not be hard going into a MPFI car. Of course this is all assuming a certain level of aptitude. It was easier for me to wire a my car than it is for some people to change a flat tire. I pulled and put in my new engine and wired it with no extra help. And by that I meant a second set of hands, did it alone. But had technical support from this board. That made it so much easier since I researched it thouroghly before I started.

 

sohc zc is definately a strong motor

 

Hey,
Try D-series.org ,For the DOHC ZC ; The Brown top comes 135hp and the black top comes with a 130hp, but also i am doing a swap in my 95 eg and i need the black top with the gray plug for obd-1,If anyone is selling one let me know.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Also, the SOHC ZC had domed cylinder heads too if I'm not mistaken? I probably am, but that would explain more HP as well.</TD></TR></TABLE>

All hondas from 88+ (not sure about before 88) had "domed" or "hemispherical" combustion chambers, meaning all hondas are "hemis"

btw, the SOHC ZC has dish pistons, however the dish is less than that of the d16z6/d16y8/d16y7

 

SOHC ZC's are D16A6 plain and simple
Until someone can take the stock SOHC ZC to a cam regrinding place, there's no way of telling the the cams are different. Yes some guy checked with his micrometer, but that doesn't tell anything about duration.
It's already been found that THE SOHC ZC HAS THE SAME PISTONS AS THE D16A6!!!
NO HEAD DIFF EITHER!!!
the only diff i can find is some run different smaller looking intake manifolds.
I'm planning on doing a MASSIVE dyno comparion between D series motors, stock and modified using my 88HF as a test mule,. I'm tired of this BS'ing. Let's bring out the FACTS people!!!

 

We did.

Here: http://www.honda.co.jp/factboo....html