What is the ignition timing setting for a 1993 Geo Storm 1.6L SOHC?

The question you ask is too involved for a proper answer. You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00 Huh? The answer is 10 degrees BTDC, or whatever is printed on the label underneath the hood. The timing mark is in the MIDDLE of the crank pulley (on the ridge between the alternator and accessory belts). You will not be able to see it, but you can feel it with your fingernail, it is just a little nick. Paint it with a tiny dot (big mark will decrease accuracy). Then you have to jump the diagnostic connector in the passenger side kick area before starting the car, verify the computer light comes on so that it is using no advance, and probably have someone put their foot on the gas to keep it from dying while you set the timing.