Im wanting to swap my pos 8 valve b8 head with a b7 16 valve head and intake manifold will it be a straight bolt up

 

like a glovvvvve

 

if you have the 8 valve pistons, your gonna bend 8 valves on the 16v head.

 

word... that's not good. just get a d16z6, you'll be happier... and it's not much more work to swap the whole motor vs. not knowing how to swap your heads..

 

the hx/vx 8 valve motors already have all 16 valve reliefs. only the 88-91 8 valve motors had only 8 valve reliefs.

 

u mean hf/cx

will fit fine.
ul have to run the dx chip or ecu.
change the exhaust mani also. or use it to boost it.

 

I have the dx ecu... is there anything else ill need to do to make it work?

 

Well, since the HX and VX motors were SIXTEEN valve motors, I sure hope the had 16 valve reilefs. Now on the other hand, the D15B8 CX motor which was the 8 valve, used the old 88-91 HF 8 valve pistons until the supply stock was used up. This occured late 1992-early 1993 production run.

1992 CX piston vs. 1993 DX piston.................



After having a 1990 HF motor given to me, I verifed the pistons were indeed the same.

 

Thanks for yalls help im goin to try it and see what happens ill let yall know how it goes!!!

 

Better yet instead of the b7 head. Find a a6 head and a z6 manifold. Same head but better cam. Just use a adj cam gear or the b7 cam gear I believe. I have used that head on my old cx block I had. My choice of the best nonvtec minime setup.