**check end of thread.. this will be a work in progress now**

hola.. its been a very long time since i have been here.. just got a new 89 si.. hellllaaa clean.. dude that had it popped the original motor (timing belt), but I have 2 motors laying around..

a DOHC ZC

d16z6

This is going to be an all motor DD, so i dont want anything too nuts, but I still want it to have a little kick.. im going to do simple stuff (i/h/e) and tune it.. probably leave it at that for a while. its already dumped on ground control and skunk2 struts, as well as camber kits..

can I mix and match parts and get any benefits? like, take the pistons/rods out of the ZC and plug them in the z6 for more juice? im just kinda brainstorming.

both of the motors need rebuilds, so i am just trying to decide which one..

im also a mechanic, and can do the rebuild in my garage..

any tips? (and i dont really wanna hear "swap for a B".. im only interested in using one of these two motors..

thanks!

 

Both make roughly the same power, the Z6 has more going for it aftermarket, plus Vtec..

 

ah.. ok.. i was looking at the specs last night, and i noticed that the ZC runs a little bit higher compression and is bolt in ( I already have a d16a1 ecu)..

It is a hard choice.. lol.. what about the wiring? I know I would have to wire for vtec (solenoid and oil pressure switch) and convert to ODBI, right?

 

the ZC would be easier to swap since its pretty much just a bolt and plug in. but the z6 does have a lot more aftermarket parts available. plus i personally like the feel of a vtec motor over non vtec especially if their around the same power range

 

if it is cost, then dohc zc is a no brainer, especially since you have the ecu and you can stay obd0 so wiring is a moot issue.There are cams for the ZC that are still available (or check out Colt Cams and send your cams to be reground).

 

yeah.. price isnt really the issue, but time is.. i need car not NOW, but very soon.. The ZC would be nice, but Im not looking to have a super fast car, and not going to mod it too much.. The cops and tuners out here where I live suck dick, and like to pull over, jack, tow, and trash peoples cars when modded.. lol..

I just need a solid DD with a lil kick..

I know the z6 is in good shape compared to the ZC.. i think the timing belt broke on the ZC (have to ask my friend) and the z6 just needs a little refresher (head gasket and up, timing kit, pumps, clutch..)

i think the z6 would be cheaper, but then I have to source an obd1 ecu, and do the conversion.. hmmm

 

I will check those out..

 

what about the clutch? can I just use the clutch/flywheel/pressure plate from an 89 integra? or should I get one for a civic (considering the bottom end/tranny are pretty much civic anyway)?

 

i had both motors before, they were great motors.
Z6 ; for a proper vtec map, convert to obd1 using the p28
Z6 ; the other way of doing it is chipping a 90-91 ps9 or pm6. google "one wire vtec obd0"

ZC; the obd0 dohc zc was great but so little to do to it. i like that it's a revvy motor and the swap is super easy. however there is a obd1 dohc zc too. the manifold and cams are different from the obd0 version.

obd0 ZC has a oil cooler and the obd1 doesn't.
the obd1 zc has the better intake manifold and cams.

damn, i regret going K-series. fml. poor crx.


oh for clutch, go by whatever year your tranny is or came from.
i personally ran the 92 civic ex clutch/flywheel with my 91 si transmission

 

ok.. that is what i figured on the clutch thing.. thanks..

when I had my b16 hatch, i was burning dudes that had boosted dc5's and ****.. thats why I never went k-series.. plus, at the time I had it, it was VERY expensive unless you knew thieves or a wrecking yard owner.. hahaha..

The z6 sounds really fun, but I realized that I have a 14b turbo laying around as well.. im thinking the ZC for my DD, and maybe this winter building a turbo'd rex with the z6..

or, just to **** everyone off, build/boost the zc, and drop it in a DA.. haha.. everyone will think I am running a b18, and then when I tell them they got smoked by a D, they will even more mad.. haha..

not going to do that, though^^

as for the ZC not having many aftermarket parts..... that is fine.. i just need a car to get to work.. lol.. i wouldnt mind just doing in and out, though.. too many cops for exhaust..

 

well, I think it is going to be the z6, as it just needs a head gasket and the conversion, and the ZC needs a full rebuild.. I just talked to my buddy, and he said that it was smoking hella bad and the rings were probably burned..

ok.. so its the z6 in the hatch with the Si tranny.. Any suggestions?

what about the intermediate shaft? stock a6 one or z6? same axles?

thanks for all your guys help! :D

 

z6 bro all day and yeah match clutch to tranny

 

for chooo.. im so excited..

so, now i just need a p28, some clips from an obdI harness, i THINK i still have an obd1 dizzy (somewhere in my garage.. lol), a top-end rebuild kit, pumps, and a timing kit.. teehee.. should only be a few hundred bucks..

again, what about the intermediate shaft? should I use the one from the stock a6 or the z6? i have both.. and what axles match?

 

after doing some reading, it looks like I am doing this..

stock Si tranny (for now)
d16z6
PM7 pistons (from the ZC)
OBD1 conversion

i read that would give about a 12.0:1 CR.. sound like a good combo for a hatch?

question is, could I run that on a stock p28 until I get it chipped for tuning? not for racing.. just to get back and forth to work..

 

i also just realized that i may not be able to use those pistons anyway, because of the fact that the rings were screwed up, and possibly broken, in the ZC.. if the rings arent broken, is it still ok to use these pistons?

 

idk if you can run them but if you can just get new rings, if your running higher comp might as well do alittle port and polish work and valve job get the head flowing alittle better also. then just get a chipped p28 and tune if you know someone that can do it cheap

 

damn.. i just dont have the dough to get it tuned, and none of the machine shops out here can be trusted, and the companies that do work on imports dont really have too good of a rep out here..

****.. well, now I am back to 2 choices.. if the pistons are still good, ill re-ring them, and use them in the z6, or I can leave the stock pistons in, and boost it later down the road.. I have a 14b, and I know cats have been to about 200+ with these turbos in this car.. I wouldnt mind just having 170ish to the ground.. that would make for a fun DD.. especially in the hatchback..

Im going to take pictures and stuff tonight and post them up, and start a build thread.. i get paid this weekend, so I will be able to go get the gasket kit and all that.. ill have to wait till next month to get the oil pump, water pump, and timing kit..

i havent done this stuff to a car since my Talon TSi... this is going to be dope..

 

yea unless you really know someone at a shop tuning is a bitch and would best be avoided especially if your not trying to make it that fast. just putting those pistons in id think you would be fine running a stock p28

 

z6
I actually like my z6 over my b16
The swap is not that hard. That was actually my very first swap I did by myself along with the wiring.

 

yeah.. i used to have a heavily modded ef with a b16 and an sirII tranny (with LSD).. it was a real fun car, but I have heard so many people say stuff about liking their z6 over their b16, that I just had to try it.. plus, when I saw that little 4wd ef with the boosted z6, i wanted to get one.. I noticed I need an IM and TB for the z6, as well.. i thought I had one.. I just have the stock a6 IM/TB

 

yea i have a z6 and it runs hard as hell, id take a gsr swap over it but not a b16 or ls.. and that manifold should work

 

well, it will work.. Its just another thing I have to replace when I have the money, since its going to choke it.. lol..

here are some pics







I may use this in the future :D :D

 

you don't NEED a z6 manifold and throttle body. I think the bore measurements are the same on both anyway.

 

That is good to know.. so, for now, when I get the OBDI ECU (p28), I can run that with the stock manifold and sensors, just until I source a z6 IM and TB?

The only reason I am wondering, is because i am just using the conversion jumper.. Ill will have the OBD1 dizzy and ECU, but no OBDI anything for the intake.. im even going to have to run the stock obd0 injectors right now..

 

buuuuuuuummmmppppppp