What's everyone using for race gas above 9000ft

[Eli]

From looking at Torcos website, they are adding octane numbers to the R+M/2 method, not motor octane which is what really matters. Super unleaded is 86 motor octane...5-6 octane numbers less than they lead you to believe as your starting point. So their so called 105 octane blend is probably 99 motor octane. For reference, Sunnoco 110 is 106 motor octane, vp c12 is 108 motor octane and straight av is 104 motor octane.

 

[RDrangstveit]

Sorry, I've been a little busy. So my sled has the older BD intercooler and I added new EBC and new AD box to it. I thought all the new RG kits had the large intercooler, I was wrong.
Det sensor went off at 9psi around 9000ft using 32oz torco accelerator with 10gallons of 91, 102octane.

Anyways,
I tried running some 100ll with same setup, sled rips all day long above 10lbs. I think my problem was a few things, deep snow plugging vents, old intercooler without fan acting as a heater, and not enough octane using torco. I'm not saying torco accelerator doesen't work. Just saying my sled ran way better on the straight 100ll. I just ordered the new intercooler from BD with fan, hopefully that will work out better. I'm sure I can run a lower octane by removing intercooler or adding fan.

Thanks for all the help