I've looked at this and have some questions. If you convert to OBD1 and use a 92-93 Integ ECU (PR4?), I know you can use the B20 distributor, but what about the injectors? Do you need the OBD1 units off the Integra or do you just use the stock B20 injectors? As a related question, how much do used 92-93 LS ECU's usually go for?

 

yeah, you can use the injectors you've already got off the b20. also, i don't know how much those ecu's go for, but if you make me an offer, i'll sell you mine for relatively cheap. let me know, my email is chad174@hotmail.com good luck.

 

how are you comverting to OBD1?
what b20 do you have B or Z?
once you convert to OBD1, you'll be able to use the B20 dist. all you'll have to do is repin the wires, to match with the ones in your dist plug. you can stick to the B20 injectors, eventhough they are pretty small looking. Or you can use injectors for the engine wire harness you are using, so if you have a crx si wire harness you can use OBD0 injectors and it will work fine!

 

I figured I'd buy a conversion harness from one of the people on H-T. I would go with the Z. I think all b-series injectors are the same size, which is slightly higher flow than d-series injectors. I figured I'd go OBD1 to get a better out of the box fuel/timing curve than any OBD0 ECU and have more options for tuning (hondata, etc.).

What is the O2 setup on the OBD1 PR4 ECU? I think I remember it being 1 four-wire heated O2 sensor. Where is this sensor placed? Header? Cat?

Your sig says you have a PR4 OBD0 ECU for sale. I thought the PR4 was OBD1?

 

there are both OBD0 and OBD1 pr4 ecus, the one i have is OBD0. i would tell yoy to stick to the obd0 injectors, if you already have them. the injectors that i had on my b20, looked tiny so from looks alone i would tell you to use obd0 or obd1 b16/18 injectors!
as for the harness i got mine from blown90hatch, he has a group buy going on right now: https://honda-tech.com/zerothread?id=390600 check it out he's a good seller!