i want to swap a turbo b18b1 into my 99 civic ex
what is everything i need to make it work, please be specific, i know that is a lot to ask but i’ve seen a lot of back and forth.. what years do the ecus need to be, motor.. etc
thank you for your time

 

The B18A was made in the Integra until ‘93 and since you want a B18B then if you want to do OBD 1 it’ll have to be either a 94/95 B18b with a 94/95 B18b ECU and you would use an OBD2 to OBD1 jumper harness near your passenger side floor board where the ECU sits since you have a ‘99 and you car is wired for OBD2 (OBD2b I think since it’s 98 and newer).
If you want to go OBD2 then I think any 96-01 B18B engine will work, but your car will need a 98 or newer ECU since it’s the newer OBD2 than the ‘96/‘97 (which I think is OBD2a). The problem is there aren’t many tuning options other than piggy backs for an OBD2 computer.
What you can do I think, but I’m not sure on this is have any ‘96-‘01 B18B engine and then use AEM EMS for your year car, which costs about $1,500 but has lots of capabilities.
You could also have a ‘96-‘01 engine and then use the jumper harness from OBD2 to OBD1 to plug in an OBD1 computer.
So you have a few options. Someone correct me if I’m wrong.
You’ll need to see which year B18b you have available, and go from there for ECUs. I think any year B18b or ECU can work with the right set up, but you need to determine if you want an OBD1 or 2 computer because you’ll have to tune for turbo, which is why I suggested just do AEM EMS. For Hondata, you’ll need an OBD1 ECU and it’ll still cost around $600 plus the price of the ECU and jumper harness.

 

i was thinking of doing an AEM stand alone, so as long as the motor is 96-01’ it should work fine? , would i need a new chassis harness made or could i have a company just make me a engine harness and change the connectors on my motor to fit, i’ve also heard the B16 trans is better and has shorter gears, will that bolt right up to the b18?

 

I think the '96-'01 engine will be plug and play into your '99 Civic chassis/body harnesses by the fenders under the hood. Someone can correct me if I'm wrong though. I don't think you need a new chassis/body harness made as far as I know. So try to get a B18B with a complete engine harness already on it.
Try to call Hmotorsonline.com, but when I tried to call them a few months ago they said they were out of B18B engines and would be for a while.
You can read the engine swap forum/hybrid forum and there are probably similar posts about this year and OBD set up.
This AEM EMS should be plug and play: AEM Series 2 Programmable EMS part number 30-6050. I know that computer is made to plug into a 99-00 Honda Civic chassis/body harness.
The B16 transmission will bolt up to the B18B and go with a hydraulic clutch slave cylinder, not the cable clutch slave cylinder from the '93 and previous B16 transmissions.

 

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https://honda-tech.com/forums/search.php

 

Man, you're going to get a lot of bristling from the few folks that hang out on these forums with broad questions like that. Take a step back and try asking some specific questions, and you may get more of a positive response.

Now...to try to answer the questions you did ask..

If you're going to be using a Honda ECU based tuning platform, you can use most of the available OBD1 ECU's.

The engine can be from any year the B18's were available. If going with an OBD1 Honda ECU for tunability, you'll want an OBD1 distributor and some saturated (aka high impedance) injectors, or you can use peak&hold (aka low impedance) injectors with a resistor box or in-line resistors. It's best to keep the original engine wiring harness from the car and adapt it to work with the engine you put in.

 

your question is VERY BROAD
let me make it simple and u can apply to which route you want


any b18b1 no matter the 94-01

your chassis is 99 ex CIVIC
aka. MUST use 99-00 civic HARNESS only
USE ur stock harness if possible

now for sensors
depends what u got with ur engine
aka if its already obd2
keep it simple. itll be plug n play with ur ex harness
aka injectors / alternator
few obstacles. dizzy plug must be converted as ex uses obd2b small 1 plug
and all obd2 b18b1 uses obd2a (correct me if im wrong i know vtec this is correct idk if nonvtec if obd2b integra uses obd2b dizzy plug or still retain obd2a dizzy plug even if 00-01 like the vtec style)
some wires need to be extended / deloom
u may or may not need to rewire the ist sensor idk if integra obd2 uses intake style or on the cold air tube like ek’s


if ur b18b1 is obd1 aka alt / dizzy / injectors
for simplicity
use your ex y8 injectors (plug n play with harness)
(( if not convert the injectors to obd1 pigtails harness side))
alternator. for simplicity more hassle buy a obd2 alternator if not again convert harness side to obd1 plug
dizzy. convert either or side to match. i like obd2a bc its 1 plug simple so id convert your dizzy to obd2a


u must use a 99-00 em1 tbracket only

now mounts if sticking oem
u must get 99-00 em1 post mount block side
can reuse stock mounts
if using aftermarket ( isuggest this route)
for simplicity keep the original post mount
order 3 bolt driver side mount when buying mounts
that way u dont have to chase the em1 post mount as its expensive / rarer


again i may be missing some things. but keep in mind. i like. simplicity when it comes to b swap with ek’s as in i dont like to touch the harnes whatsoever if i dont have to

so i suggest do whatever it takes to keep the ex 99/00 harness stock and untouched/ cut/ soldered


id maneuver however it takes to keep that^^^

so id do whatever b18b1
obd2a dizzy (if need be modify the dizzy side plug AND NOT THE HARNESS SIDE)
obd2 injector
obd2 alternator

also get any obd1 ecu from a civic / integra
get it chipped and basemap for your b18b1

or use a obd1 p75 but needs a o2 sensor
if u wanna go standalone
aem ( no experience firsthand). they make a obd2a and obd2b ecu. just use ur stock harness


any 90-01 b series axles-half shaft but must match as 90-93 axles/ half shatft///// 94-01
any 94-01 integra shift linkage
or 99-00 em1 ^^

i pretty much gave u a foundation on whats needed
read it google specific questions if u got questions
and if u cant find the answer post here. please. after u google your specific questions and do your due diligence of research

i do think its WAY OVERkill for a standalone if u want a baby bling factor id look into s300 v3. but then again it depends on your endgame realistic goals if ur gonna go 800+whp sure standalone willbe better but at that point (again no firsthand) there should be better standalones than aem


also***
ur rpm signal must be tapped from driver side shock tower to dizzy manually aka u must do it yourself with a standalone wire


respectfully correcting
all 96-98///99-00 CIVIC ONLY
must y use that chassis’s harness and only
(simplicity talking)


the integra / delsol / 92-95 civic got it very good //// but ugly
all their 92-95 civic harness /94-01 integra /idk much about delsol but i think its exactly like intrgra
got it good. theyre all universal with each other’s chassis as its a 2 piece design. aka engine sensors > passenger shock tower is 1 harness
then “chassis” harness from shock tower passenger > to ecu


where as ek 96-98/99-00 uses a 1 piece harness design aka engine harness straight to ecu

 

Let us know which year B18B1 you have found available and it’s possible to give advice from there.
Let us know if you want to use an OBD1 ECU, OBD2, or AEM, and people can advise you closer.
There are lots of options from the question you ask.