i was wondering what these could do on a '93....what can be tuned? a/f, speedo, i was thinking about some tuning and curious to know if i could benefit from these?...any idea's?

 

Lt1_edit won't work on a 93. Only Tunercat will and on top of that, you will need a bunch of other things like an eprom programmer/eraser/extra chips/adapter.
Do a search, this topic has been covered way too many times.

Yes, you can change the air to fuel ratio, spark advance and a lot of other things. If you have Acrobat Reader on your computer, you can download the PDF with the info on what it can do here.

The speedo changes through programming are very limited on 93s.