i just snagged a super moniter from a beat up supra at a junk yard today and i am going to hardwire it into my 89. i was wondering if there is anyway that we can manipulate the input that calculates fuel economy to work with 550 injectors. it came off a n/a so the mpg's will be way off. which wire does it use from the tccs to calculate mpg's? what is the difference between the n/a sm ecu and turbo sm ecu? maybe a simple resistor change in the ecu could change this(similar to 3p's tccs egr map change by removing a resistor). thanks