I have been bombarded with questions on the exchange capability of D16Z6 cams, both stock and aftermarket, in the recently popular D15B JDM Vtec engines. Instead of boring you with the grim details, here are some highlights:

* D15B and D16Z6 have the exact same cam profiles on the primary and secondary intake lobes
* The share the same exhaust profiles
* THEY DO NOT SHARE THE SAME LOBE SEPARATION
* The intake lobes do not share the same reference opening and closing numbers in relation to keyway centrelines. Same goes for the exhaust.
* The intake lobes are significantly retarded in the D15B vtec engines in comparison to the D16Z6.
* The D15B exhaust lobes are slightly retarded in comparison to the Z6.


There is little wonder on the nice power capability of the D15B, despite the displacement "handicap".
I hope that helps, as it helped me a bunch in forcing me to design newer cams for the D15B JDM engines, and the JDM ZC vtec.

 

is the refence off far enough for the d15b to be used in a z6 with no cam gear?
would the separation be a good or bad thing for turbo use.. (since you're not specific on what the separation actually is)
I have both cams, currently running the z6 in my z6, if i can use the d15b with gains i'll be happy.

 

why is this in forced induction, thats the REAL question

 

No the real question is.....Why did u waste ur time in making that post?...Seriously did it make u feel better about urself? or are you another typical H-T troll?...LMK ....Props to Bisi for clearing that up

 

what about the automatic cams in either of those motors. are auto cams the same spec as manual cams?? i heard that auto cams were slightly bigger. correct me if im wrong