Hey there guys I'm building a 95 integra. It is an led and I am putting a boosted Gsr motor in it. i am mainly looking for a list of the things I will need with putting the obd2 motor in an obd1 car. I keep hearing about this jumper wire but it's for obd1 motor in obd2 car. I'm doing the opposite of that. Any help is greatly appreciated

 

Off the top of my head here is some stuff.
1) Chip and tune for your B18C. If the engine is already a "boosted GSR" then it should have a tune on the ECU that was running the engine. However, never trust anyone's word and get the car retuned when its all said and done. If the engine is stock then get a basemap for the GSR and do not run the turbo on the car until you get it to your tuner.
2) Jumper for your OBD1 harness to mate up to the OBD2 Distributor on the GSR OR; cut off the mounting leg of the LS distributor closest to the Vtec solenoid when you try to bolt it up to your GSR head (otherwise the OBD1 LS distributor will not line up); OR just get an OBD1 GSR distributor and use your OBD1 harness.
3) Either modify the OBD1 injector clips to accept the OBD2 injectors OR; use the LS injectors OR; modify the OBD2 injectors to fit into the OBD1 clips, etc... Basically either injector will work with a little finesse. You will have to make sure that if the injectors are OBD0 or peak and hold, that the injector resistor box is wired up. Conversely iff they are saturated or OBD1/OBD2 then an injector resistor box cannot be hooked up. Look up the wiring on this... it is super simple.
4) Address the IACV. If you want to run it then you need an OBD 1 IACV. This may involve switching intake manifolds to accommodate the OBD1 IACV.
5) Wire in Vtec.

 

You don't need to rewire the IACV, they're both the same connector. You don't need a resistor box as OBD1 and OBD2 are the same type just different connectors, just reuse the LS ones as they are the same flow rate. You didn't list the ECU so that will determine if you need to hook up the knock sensor or the IAB's. Just use a distributor adapter harness from OBD1-2. Also reuse your LS alternator as the OBD2 one will not plug up. The rest should be basically plug and play.

 

Okay I thought I should have listed the ecu. I did get the obd2 ecu from the guy I got the motor from. Also the intake and everything was on the motor so yes I would like to use the injectors that are on the intake. They're 880cc is all I remember other than that I don't know about "saturated". I can make them fit though that's not a problem. Dizzy is one thing that I am mostly curious about. So I can just buy a obd1 Gsr dizzy and be good? The ecu was tuned on some gold tune or something. Regaurdless before I run the motor (although I will try to start it and make sure I have spark and fuel)I'm taking it to the shop to get tuned and tell them get it running the way it needs to be. Now that I know the iacv is the same, and knowing that I had to wire vtec solinoid in and oil pressure switch what else would I need? I have a fuel pump and all those little things that I could have learned from simply reading threads I find myself needing a little more advise.

 

So as for a shorter respond and question, I am going to use obd1 alt. is there any way I could use an obd1 ecu with this obd2 motor/head? I have an obd1 with a hondata s300 in it that i'd rather use but like I said in my last post I do have the ecu that the motor was running on.

 

 

If you're using the S300 you can just wire in VTEC. Also use the GSR 92-95 distributor, it'll plug and play and mount correctly.

 

So I don't need to hook up the knock sensor or wire in a second O2 sensor?

 

I believe you'll need to run a wire for tach signal as well.

 

I believe you can disable the knock and no 2nd 02 at all is needed

 

Can you not just use the OBDII harness and plug it in at the shock tower like you can with OBDII LS into OBDI EG? If so all you need to do additional is run VTEC and dizzy signal.

 

That would be nice burn. If anyone else could second that, that'll be my route. Thanks for all the input guys

 

Confirmed

 

Okay so if I use an obd2 harness from shock tower, and an obd1 Gsr ecu with hondata do I still need to run a wire from solenoid to the ecu for vtec? And still another for cluster signal?

 

I know for VTEC you will, not definite on RPM signal to the tach