I own a 90 civic SI. I bought it used about a year ago. I know that the block has d16a6 stamped on it. The valve cover was writen on by hand ZC right about the oil cap with some kind of crayon. I was curious if you guys know how I can figure out. I know that they are basically the same thing except the ecu and cam are different.

** nevermind the block wasn't stamped d16a6 i just supposed it was.


Modified by l1bid0 at 6:32 PM 5/30/2006

 

Well the head would be the same as well, so I think you may be out of luck with that ID technique.

 

do you know how the ecu and cam are different?

 

The cam being different I dont think has ever been proven.

The ecu is just differently mapped

More than likely if you have a d16a6 block, you have a d16a6 head. I dont believe there is anyway to tell

 

i dont think theres any way to tell ethier.i think cams are diff cams if u sit them sideby side and measure them. i hear si has more aggresive cam profile.then the rest.but like dude said its never been proven only hear say.

 

I feel kind of retarded. I checked the block once again and it was a ZC Sorry about all of that. No one at the dealer said it was swapped. Can you do a mini me on a zc block?

 

Well if the block is stamped it ZC, then it's a ZC. For future reference though and simplicity, treat it as a D16A6. And if you want to do a Mini-me, you will have to use the D15B7 timing belt due to the differences between tensioners (you can't use a proper VTEC tensioner on a non-vtec block).

 

wait isnt the single cam zc vtec?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vteckillenzc &raquo;</TD></TR><TR><TD CLASS="quote">wait isnt the single cam zc vtec?</TD></TR></TABLE> One version is, and it isn't labeled ZC. That is the D15B.

 

you can see this by looking at the dials on the head

 

whicch a d15b is vtec