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.

 

cool!!!

so.. wheres those who insist that the "jdm" d15b vtec has more lift or a bigger cam LOL


oh its cuz its JDM LOL!


but seriously.. very interesting tidbit of info/finding!

props!

 

there is something about the jdm d15b i have one in my 1992 hatch and was going to swap my motor out for a b16a or gsr or somthing but after i opened her up on the road it hauls a$$ for the money paid that engine is cheap,im going to keep it but i was wondering the same about the cam in mine the head says p08-1 im reasearching to find out which d series has the best cam in it, i heard d15b has the aggressive cam but im not sure at all

 

So correct me if i am wrong but if i run the d15 cam in the z6 i can get a little more power on the top end,and still be within stock specs?

 

cam gear key is of by ~5* comparing a d15b to a d16z6