What would I have to do to be able to run 13:1 on a ITR motor stroked to 2.0L?

 

Run 100 octane all the time. 12.8:1 is that fine line between race and pump gas, that your car will ping if it's really hot out side, especially without very good tunning and the correct fuel. 13:1 compression is just too high to run on pump gas, you basically at the very least will have to mix some race gas in with your 93 every time you fill up in order to keep from detonating. Not a smart idea, unless you have another car to drive.

AnY WaY,
Aj