integracivic94

Just a couple of questions for the honda gods! I have a 94 5g civic si (d16z6) jdm and i want to swap an itr engine! Preferably a 98 itr! obd2! i want to know if i have to use a jdm itr engine? also will my original engine harness fit or should i get the itr harness! When i do this swap will it be a simple plug and play? please tell me it will be because we have no experineced people in this country who i could ask advice from any help is very much appreciated! step by step guide would be good if anyone knows of one

B18C5-EH2

You could have gotten some great results had you simply done a search with the key words being "B18C5" and "swap" but oh well, I'll be nice here.

I stole this from myself.

Begin paste:

B18C5 engine wiring into a 1992-1995 Civic:

IMO the USDM ITR swap is easier to swap in. I've done this swap 3 times already and it is 100% easy especially if you run a re-chipped P28 and even more so if you have a 1992 Civic or any 1992-1995 Si, VX, or EX with VTEC wires.

Here's what you'd need too do if you have a USDM ITR swap:

KEEP the ITR engine harness. Regardless of what others say the plugs all plug right in. This way you get to keep the newer ITR distributor and injectors, and there is no need to rewire anything. Again this is from experience, not hearsay.

You'll have a few extra plugs left over on the ITR harness because the ITR has a few extras that our Civics don't have, like ABS, etc. You vcan just hide the extra plugs.

Want proof that the ITR engine harness work and plugs right in? How about pictures?

First the overall engine bay shots of the two B18C5 swaps that I have done for myself. First a shot of my old 1992 Si:



...and the 1992 CX hatch with B18C5:



First here's a picture of an OBD1 distributor with the two plug-type engine harness. The OBD1 Si harness has two plugs on it. DISREGARD THE TEXT IN THE PIC! It's for another engine swap use



Now here's my B18C5 engine with the ITR engine harness complete with OBD2 distributor with only one plug:



Here's a few more pics provong that the B18C5 OBD2 engine harness does indeed plug right into the 1992-1995 Civic's underhood chassis harnesses:





Last proof is a picture of the newer style OBD2 injectors that stay with the OBD2 engine harness:



Now there's a few different ways to get an ECU to work, and I'll list them from easiest to hardest:

1. Re-chipped P28. This will simply plug in. No need to wire up for a knock sensor because the P28 doesn't read for one. Better fuel, timing, VTEC x-over, and rev limiter = more power. OBD1 so no need at all to run any sort of extra sensors.

2. Kenji OBD2 jumper harness and JDM P73 ECU. I ran this on my motor for a while before the kenji ECU. You'll have to wire up a knock sensor wire and that's about it. Drawbacks are that this ECU has a 113-115 speed limiter and it doesn't make the power that the kenji-spec P28 does. ThisECU has OBD2 type plugs but IT RUNS AN OBD1 PROGRAM AND IT IS ONLY OBD2 IN PLUGS!!! I ran this ECU with no extra o2 sensor, no crank fluctuation bullshit, etc. You would need to add a knock sensor wire with this ECU though.

3. Jumper harness with USDM P73 ECU. Why? I wouldn't do this unless I was in Cali and it was necessary for smog bullshit. You'd have to wire up all the extra OBD2 bullshit and the ECU sucks compared to a re-chipped P28.

So that's for the USDM motors, but what about the JDM ITR swaps?

As Apexi-ITR has said the JDM harness can be used. It requires some stretching but it will work. If you must get the factory look then get any OBD2 type engine harness from any USDM B18C1 or B18C5 and then it will plug right in just like I said the USDM swap does.

As far as ECU stuff goes, really a P28 is the better choice again but you will need to add a VTEC oil pressure switch onto the JDM ITR motor because it doesn't have one and the P28 looks for one. Just pull an oil pressure switch from another VTEC motor - didn't you use a SOHC one Apexi-ITR?

Or you can run the jumper harness and O.E JDM P73 ECU. This will save you from having to add the oil pressure switch, but you'll have to add a knock sensor and this ECU still has the shitty speed limiter.

USDM ECU? But why?

That's about all I can think of right now. I run the kenji-spec P28 ECU in my 1992 CX hatchback and with this method and keeping the ITR engine harness I did not have to add one single wire at all! It was absolutely 100% plug and play!

End paste.

For your 1992 Civic Si hatchback you will not need to add one single wire if you simply run a kenji-chipped P28 ECU. You only need to take your stock ECU (it's the P28 he needs to rechip) and send it to Kenji. His e-mail adress is kenji211@tampabay.rr.com. He used to charge like $150.00 and it's worth every penny.

You will love the swap. In my old 1992 Civic Si hatchback it turned 13.9@101mph on street tires and full interior minus spare. That was my first time out to the strip and the strip is at 850ft. above sea level, so times may vary for you.

integracivic94

sorry put 92 si! its actually a 94 si! Thanks for the reply it was very much appreciated! Im gonna have to use the itr ecu when i do the swap to start with because im in the uk and im gonna have to send my ecu to the states to have it chipped! was i right in thinking im gonna have to use a jdm engine tho?

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by integracivic94 &raquo;</TD></TR><TR><TD CLASS="quote">sorry put 92 si! its actually a 94 si! Thanks for the reply it was very much appreciated! Im gonna have to use the itr ecu when i do the swap to start with because im in the uk and im gonna have to send my ecu to the states to have it chipped! was i right in thinking im gonna have to use a jdm engine tho?
</TD></TR></TABLE>

Okay here's what I need to know since I assumed that you were in the U.S:

1. Is your car RHD or LHD?

2. The donor car (ITR) will be from what country and will it be RHD or LHD?

3. The donor car has what type of OBD system? Usually the JDM motors have OBD2 plugs but run an OBD1 program

As far as ECU goes, if you try to use the ITR computer than you'll have to buy an ECU harness convertor. The same guy that would chip your ECU would also make that conversion harness too! Either way you'd be looking to the U.S for assistance, so why not just send him your ECU instead?

Trust me running the ITR ECU will suck. The JDM ECU has the speed limiter which sucks. The fuel mapping on the ITR ecu and rev limit and VTEC X-over won't be as good as the re-chipped P28 that you'd get from Kenji here in the U.S.

Anyways let me know those details please! Thanks!

B18C5-EH2

BTW:

If you do run the ITR ECU I'll need to know if it's JDM or if it's from a European model and what type of OBD system the Euro model uses.

Again the ITR ECU will have a different plug type, but if it's a JDM ECU all you'll have to wire up is the knock sensor. The P28 ECU doesn't look for the knock sensor, but any ITR ECU will look for one.

If the ECU you try to run is a Euro model and *if* it is a true OBD2 ECU then you will hate trying to wire up all of that extra OBD2 bullshit. Crank fluctuation sensor, extra 02 sensor, etc. it sucks.

Really bro save yourself a lot of trouble and find an extra P28 Si ECU and send it to Kenji beforehand so it'll be back to you when you're ready for it.

integracivic94

I believe the donor car will be right hand drive and will be obd 2! and my car is a right hand drive! thanks for all your help so far! very appreciated!

integracivic94

Sounds like a good idea to send a p28 over to the states before hand! once this is done, i take it the rest will be plug and play!

B18C5-EH2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by integracivic94 &raquo;</TD></TR><TR><TD CLASS="quote">Sounds like a good idea to send a p28 over to the states before hand! once this is done, i take it the rest will be plug and play!</TD></TR></TABLE>



Exactly!

integracivic94

Will i be needing to use the drive shafts , hubs , rotor's , gear selector etc? I know i need the mounts just a bit unsure about the rest! Thanks again for all the help!