Erik_Pb_Foot

so i just bought this CRX, it's block is stamped D15B.

my neighbor has a complete D16Z6 head for sale...

aside from a few hours and a headgasket and timing belt.... what else would i need?

note i've got DPFI, NOT MPFI...... and i'm assuming that i'll have to convert to OBD1, correct?

TIA

-Erik

Holly35

I got an Si intake manifold and header, helps a lot. You'll need new gaskets for those too, obviuosly, if you decide to change them. Complete dizzy with rotor, ECU, and I had to invest in a new valve cover gasket set -- my stock ones didnt fit right.

crazyslowhatch

i'd get new head bolts, water pump, oil change

Erik_Pb_Foot

i'd do maintenance stuff while i was in there but i'm wondering when i get the d16z6 stuff from my beighbor what else will i need?

which timing belt?

pcv valves different?

which headgasket do i use?

what about changing over to mpfi?

what computer do i run? does this mean i need to go obd1? or could i just use a stock mpfi computer from an si and use a vafc to control vtec?

stupid questions that could all be answered with the search button... but it's down....

thanks again

-Erik

Holly35

z6 head gasket, z6 timing belt, P28 best bet I think.

Erik_Pb_Foot

easy awesome answers.. thanks...

so i've got to convert to obd1... more work and money... oh well. i'm in no rush....

thanks for the comments.

Holly35

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crazyslowhatch &raquo;</TD></TR><TR><TD CLASS="quote">i'd get new head bolts, water pump, oil change</TD></TR></TABLE>

Yeah, I forgot. Your stock head bolts wont fit either.....I got new ones at Lowes for $1.65 or somethin. Make sure they're the same size though! Good luck

Erik_Pb_Foot

head studs/bolts? from lowes? this is awesome. never would have thought of that

-Erik &lt;--- disgruntled lowe's employee

Erik_Pb_Foot

this z6 head i bought came with a dizzy with grey plugs... am i going to need another harness adapter for that also?

also, head came with a headgasket... has been torqued down previously. can i reuse it? i know i'll get mixed answers but i'm wondering if it would be ok none-the-less. it doesn't have any sort of stamp indicated what headgasket it is..... any way to tell so i can be sure it's for the z6?

and with the d15b jdm bottom end and z6 head, what CR would i be at? would it be worthwhile to shave the head before i put it back on? i plan to spray on it in the future.

-Erik

weezie

I had a guy try that with my minie me, He forgot to take out the vtec oil jet plug on the block and used the wrong head gasket it fucked everything up. So when i Had a friend who knew what he was doing he made a new wiring harness and we used the p28

mike_belben@yahoo.com

when its apart, measure the difference in width between the exhaust valve spacing in the head and the reliefs in the piston. they dont match, so milling is frowned upon if you absolutely must minime

Erik_Pb_Foot

i knew about the oil plug... that shouldn't be a problem unless beer gets in between me and my work....

as for milling the head... thanks for the heads up... i wasn't aware of that.

-Erik &lt;--- still wondering about the dizzy plugs

Redline130

I'm pretty sure that instructions are included with any conversion harness that you buy. If not, PM Blown90hatch, he should be able to help you out, as he makes one of the best conversion harnesses. An alternate route would be to use a Si distributor (doesn't fit right on the Z6 head, but with a little modification it will work), and use a PM6 with a VAFC or RPM activated switch (ghetto). One important thing to remember is to make sure that you get everything lined up right so that your timing will be correct.

Erik_Pb_Foot

yea at first i was going to use just the vafc and what-not but i figured if i wanted this to be reliable it would be my best bet to convert to obd1 and not cut any corners.

aside from the wiring and the headaches of figuring out which coolant lines and what-not to use i'm pretty confident that i'm "ready" to understake the swap. i've done it before but the last time i did it i was doing so for a friend whom had already done all the wiring and had all the "Correct" parts sitting there waiting for me.

we'll see how it goes. i'm going to do more research on the harness adapters.

-Erik &lt;---- got all the z6 stuff, including head gasket, tb, itm, head, cam, dizzy... for $50

PhatwhipsJDMkits

in an earlier post you mentioned the JDM D15b bottom end. The D16z6 and the JDM d15b bot share the same P08 head. Only difference i know of between the two are that the d15b has a more aggresive cam. You would not be acomplishing any improvements by swapping in the z6 head but a decrease in performance. But you said you have dpfi so im assuming that you do not have the jdmd15b but the US non vtec 1.5 d15.

Erik_Pb_Foot

i have a european or jdm D15B engine with DPFI... it's a non-vtec engine... it's not the sohc "zc" that people commonly think so. I've had a lot of confusion over what it is I actually have under the hood but it's definatly a 102ish HP single cam non-vtec engine....

the z6 head ought to bring it to life.

-Erik

PhatwhipsJDMkits

what trim level is your car? dx si etc....

Erik_Pb_Foot

dx

green91

if its a d15b then its a JDM motor and originally came with a d16z6 head any way... but ive read that you should use a VX timing belt and water pump.. the jdm d15b is essentially a VX block with a z6 head

Erik_Pb_Foot

hummm.... so maybe when the previous owner put the "new" motor in he only put in a new block.... reused the original dx head and intake mani, etc....

that would make sense..... i suppose....

so i'd use the vx t.b. instead of the z6 t.b.
and vx water pump instead of replacing it with a "dx" water pump

interesting...

things keep getting stranger.

PhatwhipsJDMkits

well sounds to me like you just got a stock dx car.

Erik_Pb_Foot

who knows. regardless, i still need soem help on this mini-me... not much, but a little....

once i torque this head down i need a resistor box, obd1 clips, an obd0-obd1 harness for the computer, i need to run some wires... but what abotut he dizzy... only gray area still.... what do i do about the dizzy. the z6 head came with one.... how should i wire it? i'll be using a p28

-Erik

PhatwhipsJDMkits

since your converting to Obd-1 youll use the dizzy on the z6 head you have to change the plug and thats it. If your using the stock harness it has the resistor box so just use OBD-0 injectors and you should be set.

Erik_Pb_Foot

allright so i just plug the two "old" injector plugs into my resistor box, put in 4 obd0 oem honda _____ injectors with clips, and bolt up head.... put the plugs from my old dizzy on my new one.... and buy the obd1 conversion harness for under the dash? right?

i'm sorry to be so confusing... i'm not an idiot i promise, lol... i just want to know everything before i get in there and hit something that's going to delay finishing the headswap and computer swap.

-Erik &lt;--- who's luck would have it that the jeep would break down while the crx was in pieces

EDIT: The blanks were there so someone can fill me in on which injectors i should use. I'll be spraying either a 50 or 75 shot (wet fogger) once i get it together. Direct port by summer.


Modified by Erik_Pb_Foot at 2:55 PM 11/23/2004

PhatwhipsJDMkits

Well your using the OBD-1 harness so your not going to use the resistor box so just use the OBD-1 injectors. other than that i think thats all youll need to do.