This is my first D series, so I'm sorry if this is a stupid question. I searched around and couldn't find my exact answer. Most of the buildups were the other way around (Z6 head on a Z1 block).

I know that the D15Z1 head has 25.3cc combustion chambers, and I understand how vtec-e works. I've got a D16Z6 block here with TT rods and Vitaras, and I'd like to get a bit higher compression ratio than the Z6 head would give me. If I throw this D15Z1 head on, will I notice a huge drop in power due to the smaller ports/valves? Would the Z6 ARP headstuds fit still? Which timing belt would I use? This is a weekend car, but I wouldn't mind using it as my daily, so the gas mileage would be great. My goals are ~350 horsepower, or whatever it may take to run a low 11's or 10's. This is all going into an 88 DX, so weight is down quite a bit. Any insight would be awesome. Thanks.

 

vx head is junk it wont be able to flow any real power. The d head already is a disadvantage. The port volume of a vx head is very close to a hf or cx 8 valve head. Would you try to make big power with that?


d16a6 heads are cheap and Im sorry it doesnt have vtechhhhhhhhhh but it owns in the racing world

 

I really don't care about vtickle, but those are the two heads I have laying around. I guess I'll rebuild the z6 then.

 

a6 motors kick ***!

 

---- it and just use what you have. Just lock the rocker arms together to forget about vtack and port that bitch out.

 

ya and the .280 lift of the vx is going to work great. Want to lose up to 40 hp and waste time porting a piece of ----


I spent alot of time trying to develop the vx head etc

its worthless

 

True. Get a HX head and run the same setup as Jago which is my old setup. Y5 head and Z6 bottom end.