i will be doing a obd-1 gsr swap into my 94 vx hatch pretty soon and i have a couple questions. i browsed through the site and i came up on this thread:

https://honda-tech.com/zerothread?id=644434

that is all for a b18c1 in a vx with a p72...i will be running a chipped p28. will i have to wire the o2 like in the thread i posted above? i will be using the gsr engine harness. also, i have a blox intake manifold and a jg edelbrock itr 65mm throttle body. what throttle cable should i use. i have heard that i cant use the gsr throttle cable becuase it is too long. and i am thinking the civic cable may not reach. any help with this would be great. and is there anything i should be prepared for while doing the swap....i have bad luck! will i need to go ahead and purchase new radiator hoses? you will have to excuse my dumbness...up untill a short while ago i was mazda guy...i can tell you some things about a b6t but i know really nothing about swapping a honda motor. thanks in advance!
matt

 

I used the stock civic throttle cable on my GSR swap into my CX. Just have to be creative with the bracket. Get both new upper and lower radiator hoses, I got mine for a Del Sol VTEC. Make sure you have the GSR mounts, B-series axles, and shift linkage.

 

thanks for the input. ill be sure to grab some of those also. my mounts are on the way from hasport, my axles and linkage are sitting in my shop. you wold not happen to know anything about wiring the o2 would you? in the link that i posted above it says some stuff about wiring the o2 sensor up..but thats with a p72 running the motor, ill have a chipped p28. i guess what i should be asking is this, how many wires are the o2 sensor on the gsr? and what o2 sensor does the p28 look for (4 wire, 2 wire)?

 

i used a gsr cable for my car and i wired my 4 wire o2 straight to the ecu becuase i used my vx harness

 

if i use the gsr harness do i still have to wire the o2? does the p28 look for 4 wire?

 

yes the p28 looks for a 4 wire o2 sensor. And if you use a gsr engine harness it should already have the 4 o2 wires, so you will have to wire it from the passenger side shock tower main engine harness connectors to the ecu.

And are you sure that the gsr engine harness will fit with no modication to the main connectors on either side of the engine bay??

 

i have not heard anything about modifying a wire harness...the car is vtec already so i dont have to wire the vtec, if there is some kinda modification to the harness i would def. like to know so i can be ready for it. i helped a freind drop a ls swap in a lx civic and everything plugged right up with no modification.

 

TTT...will i have to wire a knock sensor?

 

yeh you'll have to wire a knock sensor wire. What I did is ran a wire from the correct pin from the ecu to the knock sensor wire on the gsr harness, you can get the oem wire pins from any honda dealer to fit your ecu, But I was using a p72 ecu. I don't know if a chiped p28 has a knock sensor pin.

 

well, thanks for the input..everyone has been very helpful..hopefully i can get this all figured out soon. i dont wanna rush this becuase i want it to be done right but i need to get it done before i move....

anyone know if the p28 looks for a knock sensor? or any other answers to my annoying noob thread?

 

A stock p28 doesn't look for a knock sensor, so i would assume if its a chipped p28 it will still not be looking for a knock sensor.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by japan4racing &raquo;</TD></TR><TR><TD CLASS="quote"> i helped a freind drop a ls swap in a lx civic and everything plugged right up with no modification. </TD></TR></TABLE>

Did your friend re-use the lx stock engine harness (which would work for an ls) or did he use the ls engine harness from a ls integra??

I just recently put a b16a in my 94 cx hb, by my-self with a fork-lift (i am a wiring master, lol), so if you have any questions hit me up on pm.

 

yep, that is correct. p28's don't look for knock sensors. most of the time when u chip them to run dohc all it does is accomodate wiring and sensor mistakes. makes things a lot easier cause you don't have to get it as right. chipped p28's don't even look for o2 sensors. it'll give you a check engine light, but you will run fine without it.

 

well, thats cool to know......so there would be no need to re-wire the o2 sensor, right??? check engine light dont bother me at all....every car i owned has had it on so im used to it. anyone got any other pointers about swaping this b18c1 into my vx?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bogus_ek &raquo;</TD></TR><TR><TD CLASS="quote">yep, that is correct. p28's don't look for knock sensors. most of the time when u chip them to run dohc all it does is accomodate wiring and sensor mistakes. makes things a lot easier cause you don't have to get it as right. chipped p28's don't even look for o2 sensors. it'll give you a check engine light, but you will run fine without it. </TD></TR></TABLE>

If you just run a chipped obd-1 p30 (chipped to increase fuel map and timing for 1.8 vs. 1.6) or even a chipped obd-1 p72 (chipped so it doesn't look for secondarys), you will run without a cel and an o2 sensor (i like that cause it looks like everything was done right, and emissions don't like cel's).

 

I did the same swap into my 95 SI hatch and had to wire nothing extra. Maybe cause it was an SI. But I used an OBD I GSR harness had no wiring problems at all.

 

I wrote those instructions. The o2 wiring is the same for the P28. Like everyone said, you won't have to worry about the knock sensor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PDXHatchback &raquo;</TD></TR><TR><TD CLASS="quote">I did the same swap into my 95 SI hatch and had to wire nothing extra. Maybe cause it was an SI. But I used an OBD I GSR harness had no wiring problems at all.</TD></TR></TABLE>

Mine was just as easy...makes you wonder how people mess up their **** so bad when if comes to the wiring part, which half the time is plug and play.

 

well, im sure i wil get it done with little problems. thanks for the info already provided and feel free to keep posting info. im not worried about the check engine light......i live in central ga and we dont have emissions.....(dont hate me, hate georgia!) so i dont have to worry about the inspection place giving me ****.

when this is all done i will post some pics of the swap. i would like to become a regular member on h-t. i have been registered for nearly a year and i have never posted untill recently. im just glad this is not a ricer site that has no useful info. you guys have been a great help..thank you