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Have a couple questions about this motor..

Just bought a '90 crx si with dohc zc swapped into it. I have plans of swapping it out for another b or d series motor floatin around. As far as the zc goes thats in it already, it is a fairly "fresh" motor.. Guy i bought it from recently rebuilt the top end (belts, timing belt, water pump, seals etc.) Plans for this car are leaning towards show..

Questions i have are:

1. Are there any realistic upgrades i could do to this motor?
2. Is it worth keeping in? (parts hard to find, common problems etc.)
3. Could i expect any power from it? lol

Any info would be great

 

Great motor...Bad state to own it in
all the info you need about it is right here...!!!
www.thezcr.com

 

oooops.. I need to update my location. Recently Moved to good 'ol Idaho! let me brag a lil'... NO EMISSIONS, COULD RUN STRAIGHT DOWN PIPE ANYTIME, GO AS LOW AS YOU WANT!! LOL!

 

updated!

 

thanks big chorizo!! you da man!

 

upgrades depend on your goals.

if you want a good reliable motor just run it the way it is.

if you want power, turbo
and if you want under 200whp no need to rebuild.

so you first need to know how much power you want.

my dohc zc has been turbo'd since 1999 when i swapped it in, never rebuilt

 

well.. im not lookin into makin the zc a super steamy race motor. Just want somethin that could make sufficient/decent power with. I was thinkin goin down the boosted route but a buddy told me it wouldnt be worth in a dohc zc since its obd0.. tuning purposes?

 

easy to convert it to OBD1 - just need OBD0 to OBD1 ECU jumper, OBD1 ECU and OBD1 TD43U distributor

 

the jdm dohc zc is my favorite d motor no theres not tones of options but with a few bolt on's there pretty fast, i run a dx tranny for the long gears it has tons of top end, best motor for the price i would say, i got tons of info if u need

 

i ran 7 psi on stock internals with 450 dsm blue top injectors, on obdo the problem is u must get a rare 0bd0 si ecu and get it chipped which gets spendy.
i had it in a ef hatch it straight dipped car was hella fast till i sold it, or convert it to 0bd1 like he was saying those distributers are uber rare though and cost alot unless u get lucky, when u buy the jdm motor some times it comes with the 0bd1 dissy hope this is helpful....

 

exactly what i "MAY" do..

 

Thanks for the info sparrky.

As far as upgrades, the zc is already sportin a header... thats the main bolt on it has for the moment. I might end up getting some sort of air intake for it but i dont want to get rid of my stock air box

 

i too have this motor, in a 90 si hatch. i think its great. has tri-y header and intake. but the head was worked on a bit with mild cams upgraded springs and retainers port matching and the throtle body and intake mani have been slighty bored. it pulls on my buddys b16 and with two crappy drivers myself included about a 10th off a basicly stock gsr. im also running a crx si trans. but it is way more fun to drive than my '00 gsr. i love this motor i say keep it dont do the swap. plus if you are handy its relatively easy to make ITB's for it, back yard style

 

Thanks adicuar!

I was planning on a swap but now that i think of it.. for everything i am planning to do with the car, the zc would be great. What kind of cams did you go with??

 

Lucky.

 

love to see or get some info on the itb setup for it, that would be sick let me know thanks...

 

Here is his zc minus the white valve cover.It def pulls as hard as my b16. Jg cams

 

here is a pic of my first boosted zc

 

heres another pic of another one of my old boosted zc,s crapy pic u can see how tight of a squeeze it was i had to tilt my radiator in this ef hatch,
and a pic of my current jdm zc n/a pulls on b16s love this motor

 

well the head was sent to JGengine dynamics, for the work. they used their custom regrinds, stock valves and their dual springs and chromoly retainers, as well as mildly ported and polished the head. i think most guys are boosting theirs but i like it N/A. and like i said i have an ITB set up using CBR1000 throttle bodys and a modified intake manifold. its not on the car yet as i still need a couple things first. but i think you will really enjoy the ZC however you mechanically tune it or boost it. this is my first one so i'm definately not the authority, but i believe it was said before go to www.thezcr.com the people there will help you alot more than i can. good luck!

 

Looks good.. Being OBD0, how is it to tune for boost??

 

Thanks for all the info! Like i stated above^^ Im not sure if I'd want to boost the zc knowing its obd0. I like the sounds of goin for an N/A build(nothing serious) Seems alot healthier for the motor itself too. I will gather more info as time goes but for now im thinkin of just leaving it the way it is.

 

both are old cars though, well i ran a chipped and socketed pm6 on both cars, they were ran on basemaps, never had them fully tuned, they both ran on no more than 10 psi both motors were stock internals ran great both daily drivers, the problem is u have to have uberdata or a old program that works with obdo basemaps no one around here has this any more its to old of a program, so i had fun tracking some one down that was ligit and good....

 

i love my zc in my opion much better than a b16 i have i/h/e tuned on obd0 i raced a b16 turbo 90 dx hatch i beat him by 1 car with a sliping clutch and a bad driver axel and a ripped driver mount lol i now have hasport mounts and oem honda axels and a trac bar and a stg4 cc clutch with a stock flywheel i love my dohc zc i kill mini me's b16's in many types of donor cars i have killed 90 prelude with ob1 h22a vtec swap tuned which isnt much preludes are a ton and dudes gf was fat lol i killed my dads trd factory supercharged tc from a 4thgear pull at 55 mph and walked him the whole time DOHC ZC FTW if you got the money and a extra car build it for boost make a 10sec 450whp boost monster its posible lol

 

convert it to obd1 if u wanna turbo it. the distributor isnt that hard to find or very expensive. goto tigerjapanese.com and when i got mine i think it was 115.00 shipped. had it in 3 days no problems with it. they are brand new not remanufactured from what i remember, and i even ran on an obd1 ls ecu untill i got tuned. worked fine. still does