Wtf, you guys take some stupid pills???
3 gal of 100ll with the rest 91oct is safe for 12-13lbs at 10k.
Yet running straight 100ll will make it stupid laggy and is way to much octane for peak performance.
You want to run as low of octane as possible to get the best all around performance.
In most cases on a cat you can run 6-8lbs depending on turbo size. The east way to think of it is when you exceed 170hp you need octane. But at 10k the barometric pressie drops from 15.5 @sea level to 10.2 @10k.
That means you loose 1/3rd of the air and leaves reason to believe you also lose 1/3rd of hp dropping you to about 105hp at 10k.
That's why you can run 6-8lbs safely on pg.
Yet at 5k you can only run about 3-4lbs or need a gal or 2 of rg.
On average this is a good way to consider it.
You are safe to boost like this if your baro pressure is 11.0 you can easily add 4.5lbs on 91. It basically puts you at stock power levels.
In most cases you can exceed it by 1lb on 91 Oct. After that for every 1lb of boost you need .5 gal of 100ll or higher.
So if your at 5k, the baro pressure is about 12.6.
If you want to run 12lbs you want to run about 4 gal of high octane with 91.
If by chance you hit the set sensor you drop boost .5lbs until it doest, then you know exclusive how your sled runs.
The last tm8 I had could run 6.5lbs at 10k on 91. But with 1 gal of 100ll I could run 8.5-9lbs.
But even with 2 gal 100ll running 11lbs the lag wasn't worth it. I prefer less lag.
The lower octane goes bang and gives far better low end. On the older sleds especially.