To tell you the truth octane boost does not really work if it says it adds 10 points... well that is true it does but 10 point works like this.
if you have fuel that is 91 and it is actually say 91.1 ten points will take you to 92.1 octane.
What you need to run is Torco race accelerator, it is a concentrated form of race gas and it will take your octane level of 91 and take it up to 102 if you add 32 oz to 10 gals, if you add 32oz to 5gals of fuel you will get 105 octane.
This is what I would recomend using if your thinking about octane boost so it should take your 85 octane fuel that you can get and take it up to either 96 or 100 octane which should be good for that pump gas turbo sled.
If you need any more info on it I can get you some, I run this stuff in my sled and have never had an issue with it.