I just bought a B20Z that I'm going to swap into my 93 civic Si.

This engine is OBD 2, correct?

I wanted to keep my car OBD 1. What do I need to replace in the B20Z head in order to make it OBD 1?

- Throttlebody
- Intake manifold
- Distributor
- Fuel injectors
- Fuel rail
- Wireing harness
- ECU

Which of these parts should I swipe from a 92-95 (OBD 1) Integra LS?

The intake manifold I was definately going to get, because Its impossible to fit the stock B20Z monster intake manifold under my hood. I'm also definately getting the OBD 1 LS ECU. But I was wondering if the Si wireing harness will work.

Any input is appreciated.

 

the si harness will work if you use all obd1 stuff. the b20 tb i think should still work(correct me if im wrong), youll want the im, dist.,injectors, and the ecu from the ls or some other non vtec obd1 bseries. you can rewire stuff like dist. and injectors but youll still need the obd2 plug for your obd1 harness.

 

Will the distributor from an OBD 1 LS engine just bolt right in to the B20Z?

 

it should work just fine

 

What is the easiest way to do this swap? Someone told me that what I needed was the wiring harness from an OBDI non-vtec engine, i.e. 94-95 integra LS. Then I could just hook up the ECU from a 94-95 LS and it doesnt matter if I use the injectors off of the OBDI LS or the OBDII B20Z.

Can anyone confirm this? It would be especially helpful if you have completed this swap, or a similar one.