88-91 civic/crx d-series sohc engine cam specs

having read a number of confusing and conflicting info on cam specs for the old d-series motors saying that the si cam and zc cam are the same, i have done some homework, namely acquiring cams from all 3 of the main
motor types, and have measured the cam specs accordingly:
model        cam°    lift-mm dx    in    152    5.56     ex    166    4.66              ex/si    in    156    5.74     ex    166    4.94              zc    in    164    5.92     ex    168    4.96
note:
1. these are direct measurements taken with the cam out of the motor - not trying to measure in the motor via a rocker arm or crank shaft.
2. the zc cam was removed by me personally from a genuine jdm sohc zc motor, so it is authentic.
conclusion: the zc and si cams are /not/ the same.
the reports i've read where other people have measured no differences seem to be because some individual on e-bay has been ripping people off selling si cams as a zc's - possible because there are no distinguishing marks between the two other than direct measurement of the cam profiles.
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.