CivicSi95

i have a 89 crx and obd2 jdm b20 that im swapping.

the obd2 b20 has a complete obd1 integra ls intake manifold, obd2 distributor and obd2 alternator. my question is what is the easiest way to get this wired up and running properly?

is it to use my stock obd0 crx si engine harness, obd0 integra ls ecu, and obd0-obd2 alternator and distributor adapters?

my stock crx engine harness should plug up to the obd1 injectors, correct?

HondaPartsHero

If you use the OBD0 Integra ECU you'll have to use a an OBD0 distributor. If you use an OBD1 ECU you'll need to use an OBD1 or OBD2 distributor with an adapter harness. The OBD2 alternator won't plug in so you'll need an adapter, rewire or use an OBD0 or 1 alternator. The OBD1 injectors won't plug in, but you can reuse your Si injectors as they are the same flow rate.

CivicSi95

what would be the best way to wire this up? my stock crx si harness, obd0-obd1 ecu jumper, obd1 integra ls ecu, alt. and dizzy adapters? what all will my crx si harness not have that plugs into the b20? im just really confused on the wiring for this swap. the motor is ready to drop in but i want to get the wiring squared away first

HondaPartsHero

If it were me:

OBD1 P75 w/ ECU jumper
OBD2 LS distributor w/dizzy adapter
Reuse the CRX injectors
OBD2 alternator w/alt adapter

In addition you'll need to make a few wiring alterations. The B20 has the engine fan switch on the thermostat housing, your Si is on the back of the block. You'll need to take the wiring from there and run it to the thermostat housing and use a round connector to plug it in (https://honda-tech.com/forums/acura-integra-6/91-integra-b20b-swap-2985941/). Also you'll need to run the wiring for a 4 wire oxygen sensor to the ECU. Check out my thread I made for wiring, it doesn't include OBD0 but a lot of the OBD1 info will be helpful for the O2 wiring.

https://honda-tech.com/forums/honda-civic-del-sol-1992-2000-1/92-00-honda-engine-swap-wiring-guide-vtec-non-vtec-2987229/

CivicSi95

thanks for pointing me in the right direction. this has helped a lot. i have obd1 injectors that came with the intake manifold. do i just need a obd0 resistor box delete plug like in the link below? also, do obd0 injector clips plug into obd1 injectors? i thought i saw that they did but i would like clarification from someone who knows for sure

http://www.ebay.com/itm/200926610945

CivicSi95

why would you use a obd2 ls distributor and not use the b20 distributor that came with my engine?

Da.onstocks

Hey im new to all this swapping stuff and i was wondering which sensors need to be connected to make it run i have a 1993 integra gsr and wanting to put a b20z2

JRCivic1

First, it is bad form to hijack an old, dead, non-related thread. Second, the B17A is an interesting engine... why would you want to install a B20Z into it instead ?

Da.onstocks

i forgot to mention that there is already a b20 installed and it throw a lot of smoke and im looking to replace the engine

Da.onstocks

how do i create a new thread