hey wassup all, I just bought a 90 civic hatch dx and I got a spare SOHC ZC head sittin in my storage. I was wondering what everyone thought about putting that head on the D15B bottom. Am I wasting my time, or is it worth it. I am a Smog Technician so if any of u got questions about passing smog checks or anything in general IM me on AIM: HatchB18c5 THX IN ADVANCE

 

Yes it will fit, but you won't gain much hp unless you do MPFI swap.

 

i talked to someone just now and im thinkin about swapping the cam and swappin intake manifolds(converting to MPFI). will that give me much horse power gain? and wut would i exactly need for the DPFI to MPFI i got a complete intake manifold n ZC ecu. what wiring would i need THX IN ADVANCE

 

what type of D15B bottom end?
PM3, P07/P08???

 

If you have it laying around....then why not throw it on! It is a little more aggressive as well.....do an MPFI swap while your'e at it.

 

Use PM6 ecu and your SOHC ZC head along with MPFI swap.

You'll prolly have around 105-110 HP since sohc zcs had better cam.

 

thx alot for ur help guys just one more question what exactly do i need to do DPFI to MPFI and how much am i lookin at spending THX IN ADVANCE

 

To do a MPFI swap you need the manifold with everything on it, injector resister box, 88-91 Si ECU, 88-91 Si dizzy, and you need to rewire stuff I dont have the exact directions but you can find them easy, also search Ebay you can buy a whole wiring kit for it thats real nice and comes with the resister box as well good luck My friend spent about $100 on his thats because of buying all the wiring and not doing it on his own, and he had the manifold and all.

 

I know this is a diff question, but it's not far off.

What about a dohc zc head? Or even a d16a1 head? do they just bolt on as well? of course along w/an mpfi swap.

 

the DOHC heads will not fit. And its kinda poineless to get a si ecu casue VTEC wil not activate. Unless you get a vafc too.

 

i believe he's talking about a non vtec zc. i dont know if the dohc zc/d16a1 (86-89 integra) would fit as well as it is d-series, but the si ecu would help. i had the pg7 (87-89 integra) ecu on my sohc zc and it worked fine but the gain isn't that significant.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by GoFastMotorSports &raquo;</TD></TR><TR><TD CLASS="quote">the DOHC heads will not fit.</TD></TR></TABLE>

Seen it done before. 89 integra head on A6 bottom. Met the guy at Palmdale, he said he modded a few things here and there, i forget exactly what he said. Also said it wasnt worth it. He just did it cuz he had everything laying around. I had to get it on film....now i have to go find that tape.