I have been researching doing this swap, and have also been looking for motors, and have noticed that almost all the motors I find available are JDM versions. Is there a difference between the usdm and JDM version of the b18c, I also read somewhere on this site that the JDM version won't pass emissions because its missing a CKF sensor or something, don't remember exactly what was said. Also does anyone know where to get USDM ITR motors? I also have the apexi world sport exhaust on my car right now, will I need to replace my exhaust system after doing the swap or will that fit?


Modified by RedSix at 2:06 AM 5/26/2008

 

 

bump

 

If you find a JDM R engine then use your Si engine harness.

There is an easy wiring trick to fool the OBD2 ECU into thinking you have a CKF sensor.

Click HERE for step-by-step instructions with pics on how to do this simple, yet effective wiring trick to bypass the CKF sensor. Courtesy of Katman/FF-TechNet.

As far as the other issue it will be the ECU. The OBD2B ITR ECU has the immobilizer crap in it, so that complicates things. I'll be honest with you - i'm not sure if an immobilizer bypass trick has been found yet, and posting about one could start a crapstorm because half the people replying would say "way to teach thieves how to use more stolen ITR parts!" so again I can't help here.

You could also run a jumper harness with a rechipped P28 for 360 days of the year and then swap the Si ECU back in for emissions purposes if you have that in your area.

 

you should search next time.
https://honda-tech.com/zerothread?id=2178266

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cuonglogan &raquo;</TD></TR><TR><TD CLASS="quote">you should search next time.
https://honda-tech.com/zerothread?id=2178266</TD></TR></TABLE>

...just like you could have searched first when YOU posted the same question with lots of info already on H-T about it.

 

The difference between the JDM and USDM ITRs is compression ratio and power output. Because we have crap gas, USDM ITRs have a 10.8:1 CR, and put out between 185 and 195bhp horsepower. The JDM ITRs have a CR of 11.1:1 and a power output around 200bhp.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">

...just like you could have searched first when YOU posted the same question with lots of info already on H-T about it.



</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OMGWTFBBQ! &raquo;</TD></TR><TR><TD CLASS="quote">The difference between the JDM and USDM ITRs is compression ratio and power output. Because we have crap gas, USDM ITRs have a 10.8:1 CR, and put out between 185 and 195bhp horsepower. The JDM ITRs have a CR of 11.1:1 and a power output around 200bhp.</TD></TR></TABLE>

Just a quick knit-picky stat - USDM B18C5 has 10.6:1CR, not 10.8:1.

USDM B18C5 is rated at 195hp, while JDM version is 200hp/ps. The B16B is rated at 185hp.

Not trying to argue - just clarifying a few small things.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18C5-EH2 &raquo;</TD></TR><TR><TD CLASS="quote">

Just a quick knit-picky stat - USDM B18C5 has 10.6:1CR, not 10.8:1.

USDM B18C5 is rated at 195hp, while JDM version is 200hp/ps. The B16B is rated at 185hp.

Not trying to argue - just clarifying a few small things.</TD></TR></TABLE>

lol, I was just going off the top of my head for the CRs. And the Horsepower ratings vary quite a bit depending on where you look. I've seen as low as 180 for the C5s and 205 for the CRs

 

Oh and as it pertains to this swap in particular the JDM swap won't have the CKF sensor or boss for the sensor on its oil pump, but the USDM one does. That's why I detailed the CKF wiring trick. If you don't do that trick then you have to put an oil pump and CKF sensor from a USDM OBD2 B series, which sucks.

Also the JDM Type R has "OBD2 style" plugs on its sensors and ECU, but it runs a true OBD1 program only using 1 o2 sensor, no CKF, no evap monitoring, no misfire codes, no system too rich/lean codes, etc.

It's good in that you can use the B16A2 engine harness and keep it OBD2 if you utilize the secondary o2, hook up evap, and do the CKF trick all to pass emissions, but if you run the JDM P73 ECU it won't pass emissions because it won't communicate with our OBD2 scan tools here.

I guess other important things to keep in mind are that all you really need is the block, head, and intake manifold - everything else from the B16A2 can be used such as accessories like A/C, alternator, tranny, clutch, starter, axles, shift linkages, etc.

Make sure you use the timing side engine mount bracket (cast iron/steel piece) and timing side mount itself from the B16A2. Actually you can use all of the B16A2 mounts, and should use them.

You'll have the stock IAT sensor left screwed into the ITR's IM because the B16A2 uses the IAT in the intake tubing itself.

Those are the main things I'm thinking of off the top of my head.

 

Yay for no emissions testing, Mine just bolted in, stock computer, stock hardware, new mounts.

 

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

lol, I was just going off the top of my head for the CRs. And the Horsepower ratings vary quite a bit depending on where you look. I've seen as low as 180 for the C5s and 205 for the CRs</TD></TR></TABLE>

I know what you mean. Used to be that every importer's site online stated "210ps" for the JDM ITR swaps. It took years of "unlearning" the magical "210" figure for most people.

 

Thanks for the info, so if I got a JDM b18c. Would I be able to use the usdm ITR ecm and engine harness and just get the itr oil pump and ckf sensor, to make it work or would I need anything else? Or does anyone know of any sites that sell usdm b18c's?


Modified by RedSix at 10:59 PM 5/30/2008

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RedSix &raquo;</TD></TR><TR><TD CLASS="quote">Thanks for the info, so if I got a JDM b18c. Would I be able to use the usdm ITR ecm and engine harness and just get the itr oil pump and ckf sensor, to make it work or would I need anything else? Or does anyone know of any sites that sell usdm b18c's?


Modified by RedSix at 10:59 PM 5/30/2008</TD></TR></TABLE>

Did you even read any of my replies, seriously?

You don't need the oil pump/ckf sensor if you do the wiring trick.

You MUST use the B16A2 engine harness - ITR one won't work at all because it stops at the shock towers, while the engine harness needs to go through the firewall and into the ECU since it's a 99-00 Civic.

I also noted that the USDM OBD2B ITR ECU has an immobolizer which (unless you find a way to bypass it) cannot be used.

 

Is that wiring trick done with the Si ecu or the JDM itr ecu?

 

It is done on the harness, not the actual ECU

 

Yea I know, but do you use it on the Si ecu or the jdm itr ecu.

 

The Si ecu will be looking for the CKF sensor, that will not be on the Type R motor. So if you need to pass inspection than you need to use the Si ecu. So it will need to be done.

But for now you do not need to do it if you are just using the ITR ecu.

 

So I could install the motor and everything, and when I need to pass emissions I splice the wires with that wire trick and install the stock Si ecu back in, and it should work?

 

One thing that has yet to be mentioned is that if you choose to run the JDM ITR ECU you must buy a jumper harness to plug it in, because the JDM ITR ECU uses the 96-98 style "OBD2A" plugs, while your 99-00 Civic Si uses the "OBD2B" type plugs.

The whole deal about trying to keep the engine "OBD2" is mainly for emissions. Doing the simply wire trickon the harness at the ECU, retaining a secondary 02 sensor, keepin the evap canister and lines hooked up, etc. etc. is all in an effort so you can plug in the stock Si ECU once a year to pass emissions, if you have that. After that you can plug in the jumper harness/JDM ITR computer and drive with that for 51 weeks out of the 52 weeks in the year, and it will basically be an OBD1 car for that time since the JDM ECU doesn't look for all OBD2 crap.

Also again I want to point out that the ITR ECU that does actually plug in your car without a jumper harness is the 00-01 USDM ECU, but it has the immobilizer crap I mentioned earlier, and it complicates things. Like I said earlier unless someone has figured out a bypass for it you can't use a USDM 00-01 ITR ECU in your car. The immobilzer is a link between the ignition switch and the ECU itself, and since your 99-00 Si didn't even have it there's no way to make it work without some sort of bypass.

 

Alright thanks for the info, where can you get that jumper harness?