[Batmanntexas]

What's the elevation there in California? That may be the reason you can only get 91 octane. You can easily run meth as a safety net, and not rely on it for an additional fuel source if you are worried about pre-ignition. When I lived in Albuquerque (6500+ft ASL), this is exactly what I did. I ran the smallest nozzle Alky Control sells, #7 IIRC, and set the controller to only spray under boost. These motors can handle properly tuned 700rwhp without to much issue under normal conditions (daily driven street car, NOT dedicated drag car).

-Scott