I have a 3300 # car with a 383 small block chevy , turbo 350 trans and a 4500 rpm convertor, 4.56 gears and 27 10.50 slicks. My question is that my MPH for the RPM I am turning at the traps seeems low.The car has run a 12.44 @ 107 with a 1.641 60 foot time.When I cross the traps the RPM is about 7200. This seems like about a 16% loss in the convertor and or trans. Also the flash stall seems low mabey around 3500. Not sure what i am missing here, I was hoping for mid 11s out of the car.