Iam running Sunoco 110. Get it for about 8 bucks a gallon at Parker oil. I am only 10.2 to 1 but running a where from 38 to 40 degrees of timing and nitrous on top.

8.5-1, 8lbs of boost running AV. Is that safe or should I go to 110??

The boat used to run 12.30's on motor and now it runs 11.80's with good air.

Jake is the 11.80's on the bottle?  What mph?

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There's more to the equation than just static compression and boost.  It really is a math equation, but you need to know what your top end can flow.  Carbs, cam, valve size, intake runners all play into how much octane is required and how much timing you can run to keep you out of detonation.  When I built my motor, I was trying to keep it a pump gas motor.  It's 8-1 static compression, 8lbs of boost and 30* timing.  I had John at C&J do my carbs, he ran the numbers and said I'd be very border line on pump gas.  Add in the heat at the river and I could be out of the safe zone for pump gas.  I run 30% VP110 with 91 pump gas to keep me safe.

I've read a fare amount on AV gas vs race gas and still don't understand much.   I've read guy's who swear by Av gas, and I've read some seemingly very smart guy's who say it's no better than 91 octane because it gets its rating differently, it uses different additives to get the 100 rating.  At the end of the day, it's the btu's the fuel produces, and the burn time that count.  I know I'm probably saying it wrong, but this is another very confusing topic.  That's why I choose to stay with race gas.  It takes the question  out of it for me.  And blending 30% race fuel with 91 pump gas gets the cost right on point with Av gas.