Well, pretty soon I'm about ready to do a b-series engine swap. But first off I wanna stay one step ahead and do the 5spd swap, aftermarket b-series intake manifold, and OBD1 conversion first. Besides, I'm curious to see what these 3 mods do to the a20a3 first before I go all-out b-series on this thing.
But I really want to know more about how do to an OBD-1 conversion. I barely seen anyone running on OBD-1 on this board and I want to know from those who've successfully done it on what exactly I need to do. Would I need the OBD1 conversion harness? I know I need an OBD1 conversion jumper harness to turn my 3 pre-OBD plugs into 2 OBD1 plugs...OR spend time with a wiring diagram - cut off the 3 pre-OBD plugs and wire up the 2 OBD1 plugs so you can use an OBD1 ECU. Much like installing a stereo without a wiring harness. An OBD1 ECU and OBD1 distributor is needed too of course.
I wonder if you could somehow use the 3gee distributor housing for that perfect stock-look fit, but inside would be an OBD1 distributor. My friend told me you could gut out the 90-93 teg distributor and put it in the 3gee distributor housing with a little machine work like boring out the shaft hole a bit.
Would be nice to run without that big vaccum box anymore. Cus vaccum sucks! Ironically and literally
Here's the thread I found. But all that reading and still no final verdict on what to do to run an OBD1 A20A3.
https://www.3geez.com/showthread.php?t=37494
I guess I'll just hold off till I have a b-series engine in the car? That sux cus I was curious as to what this mod could do for the A20 as well as get the conversion wiring taken cared off so I can later just swap the b-series engine in and not have to worry about the wiring anymore.
Sentimentally, I wanna make the A20 "go out with a bang"- give it all I can, of sorts in a way that I can make a smooth transition to the b-swap before I say goodbye and say hello to the B-series world. If the OBD1 mod works, I might consider going turbo over the b-swap simply cus of the level of ease.
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