25 psi car went 11.3 compared to 25 psi car went 10.9 no other changes same fuel 218 cam mild port iron heads stock headers msd 50 injectors with an armstromg chip, really nothing special done at all, v2 front mount IC art car non lockup 3400 converter. Non ball bearing turbo .63 precsison P trim 3 bolt housing John craig lt-70