So i know this subject has been gone over many times and there is a lot of information out there about it but nothing is straightforward. What all does it take to do a b18c swap into a 98 honda civic ex? Any difference in going usdm or jdm? I would like to get a part list going. Would also like to know what kind of wiring is involved?

 

yes there is LOTS of info out there, which a daunting task it does make.

you will need the engine, harness, ecu, b series mounts, b series shift link, and axles for starters.

wiring the beast will be dictated by the OBD you go with.

OBD1 is a pop choice, rywire makes harness adapters for OBD2>OBD1 that makes life easy. if the car receiving the swap was an ex it already has wiring for the V-TEC solenoid in the harness, but I think you still have to wire up a knock sensor, you said GSR so you may also need to wire up the solenoid that controls the dual stage intake runners.

sad but true is the fact that you just gotta do more research... if you do the research and get a full understanding of what needs to take place step by step you will be spending less time scratchin head and more time enjoying your new swap.

good luck and if you find yourself not understanding something specific you can always bring your issue to the table after using the SEARCH and FAQ.

-chris

 

I just started into this, and I think I'm going with a B18C1, as the JDM motor will want a JDM ECU, and inspection will become a problem.

However, I have a 97 EX, and I know I'm going to need these mounts:

Rear Tranny mount (T-Bracket) from the 99-00 Si: 50827-S04-N10

Driver side (timing belt) mount bracket from the 99-00 Si: 11910-P30-000

96 del Sol AC bracket: 38930-P54-000 ( only if you want to keep your ac)

This information was taken from another post on this forum, I didn't come up with this, and don't take any credit.

GSR ECU (p72) is needed, and I believe the axles, and shift linkage from the b series is needed as well.

I need to read up on the throttle cable, however. I see some contradicting posts.

 

^^^ What he said man for real! It sucks looking up all the neccesities but I'll tell ya two months ago I had no clue what I needed for the kswap and now Im in the process as we speak. I think all the research I've done would be enough to drive a person crazy but now I know quite a bit and hopefully wont hit any rough spots during the swap.

 

Lucky you, the wiring harness you have already has vtec and the knock sensor wired in. Someone correct me if I'm wrong, but you should be able to "plug and play" the wiring harness you have into an OBD2A GSR Engine/Trans.

You're going to need a lot of stuff from the GSR integra to swap it into your civic. One part that you aren't going to find on an integra is a 99-00 Honda Civic SI Rear T Bracket, which you can either get from Ebay (make sure it's a true OEM part) or the Honda dealership.

USDM/JDM doesn't really matter much besides price, atleast where I live the JDM motors are more expensive.

 

you will need the throttle cable from the GSR. forgot bout that. also im not so sure you really need a jdm ecu for a jdm engine. the only difference is the tune, the engine and its electrical components are the same from usdm to jdm.

 

Okay, so the P72 ECU is all you need, usdm or jdm, doesn't matter. Note taken. However, I'm sure the JDM ecu won't make it past emissions.

 

If you live in California, you can't even have a jdm motor with USDM ecu pass emissions. JDM motors are illegal.

 

keep in mind that jdm engine(96+) won't have a CKP on it so you need to fool the UDSM P72 so you can pass emissions. We had ECU's where we did all the wiring to fool it so ppl could pass emissions, I don't work their anymore but I'm sure it's not hard to do.

 

Not true. Well, maybe true. The CA laws on what is and isn't allowed are so wishy washy and change so often, but last I checked, there was nothing on the books disallowing an imported motor, as long as it is from the correct year or newer, and has all matching USDM emissions hardware.

Or you could just install the sensor...

 

very good.... the swap im studying for doesn't include that aspect. so you see OP you have to study for your own swap. I found the best way to learn is to learn what NOT to do, by way of looking at all the "HELP GSR swap throwing **** code" or "GSR swap no start" threads... in the 6th gen forum of course.

have fun and good luck.
-chris

 

The JDM/USDM differences in emissions equipment only become apparent if you're going OBD2. If you bought a USDM B18C1 that was OBD1, you'd be at the same spot as buying any JDM B18C.

The JDM B18C blacktop has 10 more HP than the USDM B18C1 (180hp vs. 170). It's also less likely to have been stolen before you buy it.....and more likely to come with a warranty. Jdmenginescorp.com has never let me down.

My recommendation if you're not in CA:

Buy a JDM B18C. I'd do OBD2 for simplicity. The advantage with going with OBD2 is that the JDM ECU will directly plug in to your OBD2A engine harness. You'll also need less wiring changes in the engine harness.

You will need to pin/splice the location for the fuel pump power wire (instructions are available on the net).

You'll need to add a wire and connector and pin location for the IABs.

You can either choose to buy a USDM oil pump and lower timing belt cover and transfer over your CKF...or do the extremely easy CKF trick. Google CKF trick.

T fitting the PCV and evap lines together.

Now it complies with USDM OBD2 specs.

Use the JDM ECU for driving. Use your USDM EX ECU for emissions. Or buy a USDM OBD2A P72 on eBay and sell your JDM ECU. Make sure you do not buy a USDM OBD2B ECU.


You'll need a 2 prong driver side upper mounting backet (B16), as well as the rear T bracket from an EM1. As well as a USDM GSR throttle cable.

The GSR shift linkage works but you'll have to bend some stuff around so you don't hit the cat. Or use a EM1 shift stabilizer bar instead of a GSR one. The GSR's shifter/linkage rod feels 100000000000000000000000000X better than an EM1...so I would keep that piece (the piece that actually moves).

Any B series axles from a 92-00 civic/del sol or 94-01 integra (except JDM ITR) will work 100%.

The internet has TONS of clear info on this swap, BTW.

 

This is false. Click the attachment and read the comment part.

If you need the thread here: https://honda-tech.com/forums/showth...2905764&page=4


I like this B-Series EK Engine Swap Guide. Quick and to the point
http://bc-garage.com/2012/10/21/b-se...ne-swap-guide/

 

^ WOW, I know in the pass they would not pass the JDM blocks.

 

i dont have to worry about emissions i live in iowa and people run whatever they want here. no kind of emissions tests period