I am doing a type r swap into my 91 si and was wondering if anyone had the schematics for the wiring.

 

No diagram needed. Use an OBD0-2 ECU adapter, distributor adapter, alternator adapter, and injector adapter. You can then use a subharness to add VTEC, 4 wire 02, and knock sensor. Don't use a USDM ECU as you'll be chasing emissions code for the rest of your life. You could rewire all the above sensors as well but the adapters make it plug and play.

 

keep it obd0 and get a chipped obd0 ecu. call it a day.

 

see my plan would be different than the above...

i would do an obd1 ecu and distributor, modify my stock harness to fit, run a hondata s300...
sort of like what i did with my high compression d16a6...running obd1 ecu, obd2 injectors, obd1 distributor and hondata s300

 

no need to swap to an obd1 distributor if the swap already came with an obd2 distributor. both dizzy work fine with an obd1 ecu. ideally of course would be to use all the components that came with the itr swap and just use an obd1 ecu. it of couse all comes down to the op and what his plans are and if he is on a time crunch.


im running chipped p61, obd1 lsv with obd1 dizzy, obd2 itr injectors and obd1 b17 alternator.

 

Another option here is to use a 1997-1998 JDM P73 ECU. This ECU uses OBDII plugs, but basically runs like an OBDI ECU. In other words, it uses just a single oxygen sensor, no crankshaft speed fluctuation sensor, and no fuel tank sensor. Also, unlike USDM OBDI, there is no purge valve or VTEC pressure switch. You just modify your harness as you would for an OBDI ECU, and wire up the OBDII plugs, but without all the OBDII sensors. It's no harder than OBDI, and you get the right fuel maps right out of the box. And if your motor is JDM, you probably already have it.