someone is selling a spun bearing zc locally. I plan on building this for boost, i have a dohc zc. Is there any way to tell between the sohc zc and dohc zc? are they the same? Please let me know wat to look for. thanks.

**Oh yea is there any aftermarket forged/ low compression pistons for a dohc zc? ive checked endyne rollerwaves but they were a lil pricey. Ive heard vitaras will bring the compression wayyy too low. thanks

 

seriously?

check early integra pistons possibly '87

 

I thought the whole "2" cams thing might be a dead give away but I guess I was wrong.

 

this kid cant be serious with this thread!what a waste of space!!

 

SOHC (1 cam) ZC:
120 hp 100 trq (9.1 comp)
http://www.hmotorsonline.com/s...30020

DOHC (2 cams) ZC:
129 hp 106 trq (9.6 comp)
http://www.hmotorsonline.com/s...30022

 

lets just assume he's speaking of comparing the engine blocks without the heads.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by therotaryrocket &raquo;</TD></TR><TR><TD CLASS="quote">lets just assume he's speaking of comparing the engine blocks without the heads.</TD></TR></TABLE>
Yeah, lets just go with that.

If you're looking at the pistons just look for a PM7 stamp on them thats the dohc pistons.

Also for a decent compression PM6 (d16a6) pistons with a thinner than stock headgasket or a little bit of milling off the top would result in about a 8.5:1 compression ratio.

Edit: Almost forgot but when I bought a ZC with a spun bearing I had to buy all new connecting rods and a new crankshaft because of the damage and out of roundness. Don't forget that 88 and a few 89 ZC's have a 22mm snout on the crankshaft meaning that sourcing a new crank counld be quite time consuming.

 

yea im not that stupid i know the diff between sohc n dohc. maybe i shouldve been more clearer lol. but yea the guy is selling a complete zc block. what would the sohc zc pistons say?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bacnoonoi &raquo;</TD></TR><TR><TD CLASS="quote"> what would the sohc zc pistons say?</TD></TR></TABLE>

 

DOHC ZC PM7 pistons are domed - serial number on block starts with number '2' - head bolt holes on DOHC are 11mm diameter and SOHC are 10mm diameter

 

^Lol! Thanks for the info jlicrx ill be looking for the #2 on the block!

 

the the sohc zc ever come with a halfshaft?

If not you can look for the 3 mounting holes on the back of the block. (not the alternator bracket tho)

 

i dont know if they ever came with a halfshaft but my sohc zc block has the three mounting holes for one on the back

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hondacivic90zc &raquo;</TD></TR><TR><TD CLASS="quote">i dont know if they ever came with a halfshaft but my sohc zc block has the three mounting holes for one on the back</TD></TR></TABLE>

duly noted.

I have one of each in my shed, but they are SO buried i couldn't go check

 

ask the guy selling the motor if its DOHC or SOHC

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 89s1 &raquo;</TD></TR><TR><TD CLASS="quote">

duly noted.

I have one of each in my shed, but they are SO buried i couldn't go check</TD></TR></TABLE>

THis is my SOHC zc..

 

i did, he said dohc, but ppl now days will say anything to sell their ****. so i gotta find proof