which head can achieve more hp the dohc zc head or a sohc y8 head
i have both and plan on doing a all motor build up but some say the y8 head is better and some say the zc

so which is it

the head will be sitting on a y8 block and internal stroked to a 1.9 liter

 

DOHC ZC head will not work on SOHC block

 

i saw that you can
http://www.honda-tech.com/zerothread?id=1079426&page=1
i got the idea from this site

 

Well, the DOHC ZC head is non vtec, while the SOHC Y8 is vtec. Not that it really has anything to do with it, because you can make anything fast with time and money (a lot of it in some cases)

Also, you can't really ask people 'which head will create more hp' There's many different things that cause the numbers to go up. You going FI or NA?

 

Read the thread. The head and the block don't quite line up... coolant passages specifically... and it leaks coolant between the head and block.

I would highly advise against doing this swap.

 

Yea me too.

Coolant passages do not line up, and leak. You also have to do some modification to the head gasket and definitely change out your headstuds. All this "just to be different?" Sorry but not at all worth my time and/or money.

 

I agree. Using that guy's nasty setup as inspiration is foolish. You can tell just by the pics that it is leaking coolant badly from in between the head and block.

Why not just swap the motor out completely? A D-series N/A motor isn't really worth the money, IMO. I have seen great numbers out of fully built D-series, but that included a ton of R&D and money.

 

Beyond that, I don't understand why someone would go through all that work to frankenstein on a crappy head from the late 80s just to have DOHC.

I'll bet a late model D series VTEC head flows infinitely better than that beast. I don't think the tunability of DOHC is worth the sacrifices being made in using that head.