So are there any engine management either chips or monitors that i could get for my 87 RX, I'm thinking about getting a SAFC, but i dont know if that'd be a waste for this.

 

But i mainly want something that i can monitor everything thats going on, and i know a safc can't do that.

MegaSquirt.

http://www.bgsoflex.com/megasquirt.html

http://www.msefi.com/index.php

Build it yourself or buy one assembled: http://www.glensgarage.com/

be it the safc or the avc-r, neither will have a apex'i harness for the rx. either one of those is for tuning though, you'll be able to monitor what they control..

 

what exactly do you want your ideal piggyback computer to do?

well from what i've researced, megasquirt will be the best for what i want. I dont know why i didn't think if that before...