So I have a 90 DX sedan, already swapped with a B18a running OBD0, and it snapped a rod. I was thinking of getting a B20, there's a wealth of them that are OBD2, and they're cheaper, so I just want to make sure I'm not overlooking anything considering the swap.
I need to OBD1 swap the car and the engine. My checklist is:
1. Jumper harness for the ECU
2. Splicing OBD1 injector plugs into the harness
3. OBD1 dizzy and either splicing plugs or getting a jumper.
​​​​​​​4. Four wire 02 stuff. Rywire harness comes with provisions for it.
I didn't see any sensors with different plugs between OBDs. Is there a knock sensor or something else on the B20 that my current engine lacks? Can I just delete it or should I find an OBD1 pinout and wire it up? Thanks in advance
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you know a b20 is just like a b18 only a little bigger
you can drop the b20 into your car and not have to modify anything if you were already running a b18

you would only have to change the motor and keep everything else
your wiring your intake mani your header you can keep all your old stuff
it all bolts up because the b20 is the same as the b18 other than the fact that its a bigger motor

 

Yep, it's plug and play. Keep all your old stuff, swap it to the b20.

You just have to move the temp sensor wiring from the hard water pipe to the thermostat housing. Swap the old crank pulley to the b20.

 

So I checked out a thread for OBD0-1 swap on an Integra and basically it's just what I had listed, along with the resistor box delete for OBD1 injectors.
​​​​​​​If I used all my B18 gear that process would be fine, so that temp sensor is the only thing different? No knock sensors or anything I need to know about?

 

And out of curiosity Cao why would I swap the crank pulley? Are the accessory drives different?