Guess the MPH is the issue. To get the car to drop into the 10's will require over 120 or 95 in the 1/8 with a heavy duty 60 foot. If you can move the trap speed up.. then its easier. At 123 its a lot easier to drop into the 10's. Also the 49 will run out of steam past the 1/8 mile mark.. so shooting for like 98-100 in the 1/8 will more than likely be what it needs. The amount of heat from the little turbo will also be high.
Ed's car ran 11.3 on a stock turbo. But understand the "slicks, HIGH timing, weather(40's), and dead on nuts tuning" to get the number.
Steel wheels.. dont think so. That is a hinderence when your trying to get the very last .1 out of the combo. As are high miles, high leakdown, stock IC's, exhuast systems, weight, etc
11.6 is really moving well with a TA49 on a street car(meaning radials, ac, steel wheels, drive to track) How many 70+MM turbo cars wish they ran 11.6's
Want faster.. be creative and start pulling all the corks out of the system that hamper performance. Weight is number one.. whether its body or reciprocating.. like pulleys, wheels/tires, driveshaft, TQ converter, etc.
Doing great