so making a new chip from a stock bin file and my car now has 3.73 rear gears in it what constants am I supposed to change to deal with this? I searched but found nothing for this ecm.

 

i'm assuming you converted to '730? i don't think the RS came with '730?

you can fix the ECM's speed measurement easy enough with the road speed constant. regarding the electronic speedo, there is a fairly course adjustment available, for more info see here:

http://www.eecis.udel.edu/~dzug/92z2...0-vss4T56.html

you should be able to get it close, but perfection might require switching the drive/driven gears for the VSS or an external box with a finer adjustment range.