The TA-49 is generally under-rated. A friend of mine in my local club ran 11.1 with a TA-49, stock engine, and CAS V-2. That was with race gas, probably around 24-25psi boost (I would have to ask him). With a TA-49, stock I/C, and stock engine, I have run 11.97 on 100-octane gas on a cold day. With the new CAS V2 and a few other tweaks, I'm shooting for mid-11's on 100-octane.
Two words of advice: TRACTION and TUNING. You'll get there, and your car will be a lot of fun on the street, too.
PS: I've heard that the sweet spot for the TA-49 is in the 23-25psi range. Any higher than that and you're probably falling off the map.
Good Luck,