Well i have a 1991 Civic hatch with a stock d15b1 motor 4speed
and im planning to swap a 1991 B18A1 LS motor inside that i just picked up that is pretty much complete ive got the mounts transmission, linkage, ecu, axles but i still gotta go to the junkyard and grab the wires that goes from the ecu to the engine and the fusebox and i needed also some advise on the dashboard harness because i wanna keep mine but dont know which wires i would have to connect to the LS harness if someone could help me on that i would really appreciate it and as far for the swap any advise would be really helpfull since i never have swapped a B-series motor in a civic hatch only have done on a integra with a same motor but that about it.

 

use your stock harness and convert it to mpfi. look in the FAQ's under MPFI swap thats all the info you need

 

which part of the stock harness are u talking about the one to the ecu into the engine compartment but y not just grab the whole complete integra DA harness except for the dash harness tho just wanna know what i gotta connect from there to get that running or will the MPFI conversion eliminate that?

 

The DA harness will not plug into your underdash of your DPFI honda.

Just use your existing wiring harness for your civic dx/std. Everything will plug in, you will just have to run a few wires into the engine bay. It's really simple process.

Since you are running a Dx or STD model, no other engine harness will plug into your underdash, which is why you cannot use the DA engine harness for your car.

Also the stock mounts on the LS will NOT bolt into your EF. You will have to purchase EF B series mounts with cable trans mounts from Hasport or Innovative. Those would be the 2 I would suggest looking into.

 

u have a 4 spd....ur b-series axles wont fit in ur hubs....u gotta swap them out with ex/da/si/or da

 

Fixed.

 

so i dont need to grab the DA harness? just use my civic one and will my old wires fit in the DA ecu or do i have to grab the jumper harness for that?
but what do i do for the dashboard harness ?

yea i know my mounts wont fit im looking on the internet for cheap b-series mounts for the ef anybody have a good site where i can buyem at

 

oh really damn guess i gotta go junkyard and grab those then thanks alot man for letting me know

 

For the mounts if you are strapped on cash go Ebay.
As far as wiring, the MPFI conversion is pretty easy and you can either run the DA (pr4) ecu or the 88-91 civic Si (pm6?)
Its been years but I think those are the correct ecus that will plug in.

 

you wil need to convert to mpfi. buy ls harness and splice it into you std harness. theres's some on Ebay for $130 +15 shipped (already ready to plug and play).
http://cgi.ebay.com/ebaymotors/88-91...Q5fAccessories


you need a resistor box for injectors.

you need 90-93 integra axles with half shaft (intermidate shaft).

pr4 obd0 (90-91 integra) ecu or if converting to obd1 (92-95 integra LS) ecu

you will need civic dx or si or integra 90-93 integra spindles or hub since civic 4spd or std won't fit. Use your civic upper control arm if you are using integra spindle. Integra upper control arm will leave a big camber on your car.

mounts you will need b-series mounts. If you are using a 90-93 integra tranny(trans) you need to buy cable b-series mounts. If hydro (94-up) tranny(trans) you will need hydro b-series mounts.

your indash plug will plug into the 90-91 ecu (obd0) if obd1 (92-93 integra).

as far as shift linkage goes 90-93 linkage will not fit. You will have to custom made one by cutting the integra and shorting it to fit or your best bet is to buy a aftermart one. Hasport go for $135 with free shipping on EBAY.
http://cgi.ebay.com/ebaymotors/HASPO...Q5fAccessories

Thats all i can think of.

 

oh okay and yea im gonna run the 91DA ecu pr4 thanks for the advise

 

ohh okay then there is quite some stuff i still gotta get resistor box, integra hub, hasport shiftlinkage, ef b-series mounts and i think imma buy the mpfi harness to plug in play like u said so i dont have to do any cutting wires.

gotta save some for that im trying to get all the info i need and parts to get my swap started, im going to pick my LS motor today cuz its been sitting at my friends house i wanna prep it up and clean it real good i will get some pics up posted as soon as i can also i dont wanna rush into the swap dont wanna get stuck into places where i would have parts missing but thanks again for ur info

 

check out craiglist for motor mounts u can use a DA driver side motor mount and i believe the rear one but u do need tht tranny one and well look on Craiglist.com and search for shift linkages like an SI-R one its gold in color and perfect fit i have one of those and well just check out tht site for most of ur parts

 

or OBD1 injectors and you dont even need Resistor box.

 

okay so i got my motor the other day from a friend of mine and what i just found out its a automatic LS i guess which is still okay im just gonna have to convert it to manual...so i pretty much just gotta grab the manual trans, clutch and just a question can i still use the automatic axles and intermediate shaft or do i have to get it from a manual one?

well im taking the tranny off the motor tomorrow and gonna clean the motor a lil bit but anyway here are some pics of the motor and my car mine is the red one the white one is my brothers

 

I think auto will work but no too sure. anybody else who can verfiy.

 

auto intermediate shaft will need to be modified if you can get a manuel one it would be easier to just bolt on...

 

yea i still need to get the manual intermediate shaft and axles
but i just picked up the integra DA hubs and DA spindle and DA resistor box for the injectors but im still not to sure how to do the mpfi conversion cuz i do wanna use my dx harness instead of buying a si harness ... but i still need the axles, manual tranny and motor mounts and im planning to buy the hasport shiftlinkage so i dont have to weld my old one.

oh yea btw freeagent how much did u get ur innovative mounts for? and where
btw ur ef build is coming out nice

 

thanks man
i origanlly ordered from ebay but they took like over a month
and then cancelled that and orderd straight from innovative and it took like two or three weeks and paid like 300 or somethin it was like 20 or 30 more than ebay