Unless they're outrageously efficient, track officials won't do (or know) anything @ a test-n-tune, certainly not until they actually see you going faster than you're legal. Of course, it will come to light if you dial in at under 11.50 (If they're paying attention).

I'm not trying to advocate being illegal, I just think you oughta go see what it does before you assume its gonna be under the 11.50 mark. You may (likely) get there eventually, but that's pretty fast, and it will likely take some tuning and adjustments before you get there. I don't think you should just assume the cars going to hit its potential right out of the shoot, and why slow it down before you even know if you have to or not.