Not to mention switching to 120 lb/hr fuel injectors. Initially after the bigger intercooler/t-body swap, the car only picked up a couple of hundredths.... but was much better earlier in the run. The A/F ratio was OK but the datalog showed the injector duty cycle maxed at 100%. Turns out that in this supercharged application, when you run out of fuel (via injector size) the engine does not go lean....it just quits making more power. Now with the bigger fuel injectors the engine just came alive. Even then, at the end of a 1/4 mile run the duty cycle with the bigger injectors is just over 90%. In the 1/8 mile, where we normally run the car, duty cycle is only at 72% or so.