wassup guys... i'm unsure of the year of the crx right now... but i was wondering if i can drop a motor from a 94 civic ex into a crx si? i think the motor in the crx is d16a6????? i'm unsure tho. i kno the 94 ex has hydro tranny... will the sohc cable tranny work with the newer motor. i'm sure i'd have to do some wiring in the engine bay since the motor is obd-1. any write ups on that? thanks a lot guys.

 

will all the motor mounts be the same or will i have to use the motor mounts that are on the crx si motor?

 

http://www.geocities.com/bing_bong916/vtec.html
at least look in the FAQ before posting a question like this.....

 

ok, this is kinda helpful. i don't want to stay obd-0. should i just use the crx harness and get a obd-0 to obd-1 jumper harness? also... they explained a minime.. but what if i wanted to use the entire motor? block+head? did crx si come vtec?

 

sorry if i sound dumb... i understand eg's pretty well but i've never worked on a crx before.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by perseverance &raquo;</TD></TR><TR><TD CLASS="quote">ok, this is kinda helpful. i don't want to stay obd-0. should i just use the crx harness and get a obd-0 to obd-1 jumper harness? also... they explained a minime.. but what if i wanted to use the entire motor? block+head? did crx si come vtec? </TD></TR></TABLE>

you can't stay obd-0 with that motor anyway.

If your car is already a an SI it makes it a bit easier.
you need a obd-1 to 0 conversion harness
4 wire o2 sensor
and use a obd-1 dizzy
make sure you get a 92-95 Civic EX/Si wiring harness too
use your intake manifold and tranny
bolt them up to the engine.
add the appropriate plugs where necessary

 

you can stay obd-0 with that motor you just need to use the a6 manifold, and the only other thing you need to do is extend one coolant line. also the cable tranny will bolt right up all d's are the same. you can use an obd-0 dizzy you just need to slot the holes. as far as vtec working you could use an rpm activated switch, it wont control the fuel or timing but it works. ive ran this exact setup for 2 years without a problem.

 

yeah thats probably more wiring then this guy is looking for
Plus if he ever decides to go turbo or anything he has more tunning options being wired obd-1

but go with whatever you have money for.
if you got the whole motor and tranny from the EX you might as well snag the ECU and distributor and wiring harness from the guy

 

the rpm switch is only 4 wires and one relay, it can easily be done in a half an hour. i completely understand what your saying about the obd-1 though, more tuning options and more tuners, i agree 100% with you on that, but remember there is turbo-edit for obd-0. im just giving an easy cost effective option.


i doubt he would wanna deal with adding all the necessary stuff for a hydro tranny if you think an rpm switch is too much.

 

the thing is... i own the 94 ex... but i smashed the rad support pretty bad. it's fixable... but i'd rather go with something different... not to mention i have a boosted hatch. I do plan on staying obd-1 if i can. r u guys saying i can use my tranny? if so... how? i've never done a motor swap before so i'm kinda slow on things but i have done my own clutch and what not. Wiring is good too as long as there are some writeups or walkthru's. Since i have both si and ex harness... should i use a combo of both? vtec... couldn't i use it right off of my p28 ecu... if i stayed obd-1? oh and an rpm switch isn't too much for me. i'm an installer at circuit city so wiring up relays,resistors,and diodes are no brainers.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by vega_box &raquo;</TD></TR><TR><TD CLASS="quote">

you can't stay obd-0 with that motor anyway.

If your car is already a an SI it makes it a bit easier.
you need a obd-1 to 0 conversion harness
4 wire o2 sensor
and use a obd-1 dizzy
make sure you get a 92-95 Civic EX/Si wiring harness too
use your intake manifold and tranny
bolt them up to the engine.
add the appropriate plugs where necessary</TD></TR></TABLE>

sorry but dont listen to this guy.


you need obd0-1 ecu and dist conversion harness .
EXISTING engine harness.
misc male plugs
same mounts
year of clutch to match the tranny
proper ecu

you CAN stay obd0 if you choose but it would kinda be dumb . unless you choose to run your vtec off a switch.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Ch3mik &raquo;</TD></TR><TR><TD CLASS="quote">

sorry but dont listen to this guy.


you need obd0-1 ecu and dist conversion harness .
EXISTING engine harness.
misc male plugs
same mounts
year of clutch to match the tranny
proper ecu

you CAN stay obd0 if you choose but it would kinda be dumb . unless you choose to run your vtec off a switch. </TD></TR></TABLE>

wha the hell
I listed all the stuff you did
so your telling him he doesn't need a 4 wire o2 sensor??
I had this swap in my car and thats exactly everything I had minus not listing the p28 ecu
you don't need s distributor conversion harness
your only adding two extra wires abd nacthing up the rest
Just get a ECU pinout diagram to help with that.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by perseverance &raquo;</TD></TR><TR><TD CLASS="quote">the thing is... i own the 94 ex... but i smashed the rad support pretty bad. it's fixable... but i'd rather go with something different... not to mention i have a boosted hatch. I do plan on staying obd-1 if i can. r u guys saying i can use my tranny? if so... how? i've never done a motor swap before so i'm kinda slow on things but i have done my own clutch and what not. Wiring is good too as long as there are some writeups or walkthru's. Since i have both si and ex harness... should i use a combo of both? vtec... couldn't i use it right off of my p28 ecu... if i stayed obd-1? oh and an rpm switch isn't too much for me. i'm an installer at circuit city so wiring up relays,resistors,and diodes are no brainers.</TD></TR></TABLE>

oh if you own the 94 thats makes everything a lot easier.
motor bolts right in as long as you use your old mounts from off of your d16a6.
take off the tranny on the z6 and bolt up your a6 tranny.
the 94 is a hydro tranny and can not be used on the 88-91 cable tranny cars unless you have a cable to hydro kit.
since its a Si use your old intake manifold as well.
you'll need a couple of plugs from the EX harness for vtec, distributor, o2 sensor.
I beleive everything else should be there.
I did this swap my on DX so I had to use a lot more wires then you.
get a converions harness. It adds the wires you need for vtec, the 02 sensor and something else I can't remember right now. But they come with instructions so that should guide you through that part

 

sweet.... everything looks much better than i originally thought. but yea, i have to stay obd-1 cause i'm going turbo and the guys at cft tune well on crome. especially since i have the 94 ex at my disposal might as well use the good from it. so they sell a conversion harness for the engine bay? if so... where? if they do that.... then that makes it so much easier. then all i'd have to do is plug in my p28? or get an obd 0 to obd-1 conv harness for the interior as well? i have a 4wire o2 sensor on my car right now so that shouldn't be too bad.

 

i found a harness at hasport...EFSI-VTEC.88-91 Civic and CRX Wiring Subharness for HF/Si with VTEC engine. if i get that.... my motor will be plug and play? then just get an obd-0 to obd-1 conv harness for my ecu?

 

check out these guys http://www.rywire.com/store/index.php

they should have whatever you need

 

these harnesses are more expensive then the one i found on hasport. if i can use the one from hasport... i'd use that one. can anyone verify the hasport one for me?

 

no that hasport harness is not intended for that, thats not what you need which is why its cheaper.

if you've never taken an older car and moved it up to obd-1 before, then you need a harness like rywire's.

it comes labeled, with instructions, and the guys who run it are all active honda-tech members so you can PM for help if you really get stuck.

obd1 is quite a few more wires then the crx si has.

everything vega has said so far is 100% correct. dont skimp on the harness, you will regret it.

 

use the rywire

I have the old skool jkb converions harness

I think thats what it was called

you have everything you need basically

 

vega, do you carry fire extinguishers in your hatch?

 

what for?

 

ummm nevermind.

 

rofl

 

ok... thx for the help. now one more question and i think i'm good to go til i do the swap. the harness i'll get from rywire... is it just the harness in the engine bay? or does it go str8 to the ecu? cause if this requires ripping out the dash then this looks like a little too much work on my first swap. but if it just plugs into the shock tower and then there's a jumper harness that connects to the old harness for my p28 ecu then that'll be cool. also... would i have to run the vtec wiring? or will that all be part of the harness? i'm trying to get a mental picture/wiring diagram of what's going on.

 

the harness looks like this

Its basically the "middle man"


One end goes to the p28 ECU and the other end connect to the end plugs from your original ECU harness.
After you get done you won't see it because it will sit on the floor where your ECU is. And then you will have some wires that extend to the engine bay. Thats when you use the appropiate plugs needed from the EX engine bay harness to match up to the engine.
vtec wiring is included. Only thing you need to do is add the plugs