alright i just purchased a d16zc sohc base hp is 127 and torque is 106. i have a skunk 2 intake and 62 throotle body, aem fuel rail , fpr, and pump,sci ignition. I also have a d16a6 cylinder head with 1 mm ovsized valves, port and polish job. it comes with titanium springs and retainers as well as stage 4 crane cam but i dont think ill use that setup for what i want considuring ill be going with boost about 6lbs, but if u think it would think that would be a good i dea say so.ill be using a hf manifold and a afc controller. So do u think ill be better of using the stock head or the d16a6 head for boost and im hoping for about 220 hp

 

Well 220 would require a little more boost and alot better manifold on the a6 head, being as it's non vtec. However, that isn't a handicap at all. The way that head is set up, it would benefit you greatly when running much more boost.

As compared to my car for example, I'm running a completely stock y8 vtec head with 20psi on a t3/t4 and acheiving over 300 whp on pump gas. In this situation, vtec is somewhat of a hinderence in responsiveness for me. If I had your head on my car, I could easily see 50 more whp, and much better mid range power and responsiveness (depending on turbo)

If your goal is only 220, I'd suggest selling your head for a stock vtec head and investing in a nicely spooling turbo and manifold and better fuel management.

At that point, you could have 220 whp pretty reliably with a good tune. I made 226 on a completely stock y8 motor with a drag 3 kit and the vafc hack. I would suggest a slightly better fuel management approach for reliability.

In short, if you want serious power, stick with the built head. If not, PM me when you decide to sell it !

 

what are the differneces between the a6 head and a y8 for say? what makes the a6 better for boost?

 

a6 = non-vtec.

Really only better for 20psi+.

 

how much boost are u planning to run and im guessing its not a stock bottom end

 

i have an a6.......i was asking what the differneces are in the head such as flow ect.

 

one difference is that the y8 is single cam and the zc motor is dohc.

 

the reason he would want the a6 head is becasue he could tune his computer to the cam, but with the y8 hes got to tune for stock lobes then for the vtec and thats hard to do. and plus my head has alot of good flow charateristics

 

vtec is never a hinderance when making power.

it all depends on tuning.

for boost, you want the best flowing setup available. while flow isn't critical it definitely helps when making power.

to say the a6 head is better for boost over 20psi doesn't really make any sense either. stock vs stock the better head will be one that can flow more air. in this case, its the vtec head as honda designed it to make more horsepower on the high lobe and the rest of the head is designed accordingly.

 

Not all zc is dohc

Considering were not talking about stock for stock, the a6 head were speaking of is capable of moving more air than a stock y8 head.

As far as linearity, when you spool 15psi before 5k rpm, you don't have much tuneability for vtec crossover on a single cam head.