Knock and boost Question

[Justa231]

At the track, I can turn up the boost to 25 lbs with race gas and I do not get any knock.
If I leave the boost level at 25 lbs and use 94 octane gas, I get knock at 10 lbs of boost. I do not dare beat on the car leaving the boost at 25 lbs without any race gas.
Does this make sense?
Why do I get knock at 10 lbs of boost when the boost is set at 25 lbs, but when I turn it down to about 20 or 21 lbs with 94 octance, I don't get any knock? (alky)
Does the turbo act differently at 10 lbs of boost when the max is set at 25 lbs compared to 20 lbs?
Thanks
Nick

 

[blackbuick87]

Because the race gas is giving you more octane. The Alky is probably bringing your octane to about 105-110, while the race gas is at 115.

This is normal.
You cant expect to drive around at race boost levels without race gas

 

[Justa231]

I was just wondering if 10lbs of boost when it's set at a max of 25lbs is the same with a max of 20lbs.
In other words, does the turbo push the same amount of air at 10lbs no matter what the max is set at?