Is yours the SPI or MPI AEE Engine?
You can mark your dizzy in its origonal possition, then advance it a bit, using Higher octaine fuel... you should notice it picks up quite a bit better, but to far and you will cause damage through Det, and to far back it will run like crap and back fire.
If you get it rite, it will be great, and be sure to remeber the origonal possiton for when you go back to normal fuel.