Changing nothing else, raising (or lowering) compression by .5 is only going to make a difference of about 7 or 8 horsepower, if that. Compared to the headaches of mixing fuel and having to worry about detonation, my personal opinion is that for a street motor it's not worth it to try to push the limits on compression. For a max-effort race motor where you're looking for every advantage you can get and running race gas, you bet, but on the street - for me - the risk and headache isn't worth the small HP difference. Of course, everyone's free to make their own choices.
Bear
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