93 performance question

[JFerrarini]

since I only have the canned tunes on my new purchase (thanks Bill for helping out so quickly) I was wondering about the 93 performance tune. 93 octane is near impossible to find in the Omaha area. Can you run 91 octane on the 93 and still be ok? I feel half retarded for asking since 91<93 but I'm not sure how on the edge these tunes are. Am I ok to run this or is guaranteed to ping?

[88Racing]

Shouldn't be any problems.
There would be a bigger one if you tried 88-89 and didn't adjust the timing.

Peace!:)