C1V1C

What all has to be done since the motor is OBD2 and the car is OBD1? I'll be running an OBD1 integra LS ecu, do I have to change the injectors or distributor to OBD1? Thanks.

C1V1C

This is what I just found that someone else posted, anyone have anything else to add to this:
OBD II Integra's use the same basic wiring harness as the OBD I DC Integra's or the EG Civic's (EK Civic's use a completely different style of harness). The addition wiring for the OBD II specific sensors are simply added and have their own plugs when going from the engine harness to the in-car harness. They can simply be left unpluged as the OBD I ECU won't need the information and won't care if their hooked up or not. Your OBD II fuel injectors and distributor aren't interchangeable with their OBD I versions (at least not plug and play) but as long as your still using the OBD II engine harness, they will work fine. This is all internet based info though, I haven't actually tried it myself to say if it works for absolutely sure or not. If you want to use an OBD I wiring harness on your engine, you will need an OBD I distributor and injectors.

StorminMatt

Nothing really needs to be 'done' to an OBDII motor to run it in an OBDI car. You just don't use those sensors that are normally used in OBDII applications. The crankshaft speed fluctuation sensor is a perfect example here. As for the injectors and distributer, both OBDII injectors and the OBDII distributer are compatible with an OBDI ECU. Just keep in mind that the B20 intake manifold will not fit under the hood of a Civic. You will need to get an Integra intake manifold assembly.