He takes a stock vehicle and dynos it
Then a computer is used to start tweekin the fuel and timming matrices while on the dyno. The power and torque are maximized for all throttle positions between idle and WOT in 10% increments, and RPMs from idle to WOT in 200RPM increments.
example: 600 rpm idle and WOT of 6000rpm is 5400 divided by 200 (rpm step size) equals 27 rpm points times 10 throttle position points or a total of 270 points in the matrix.
there is a matrix for each program/setting.
the ECONOMY setting will maximize fuel mileagewhile maintaining a smooth running engine.
The TOW/HAUL setting maximizes the performance between 45 and 75 MPH but keeps it pulling strong all the way to redline.
The PERFORMANCE setting maximizes performance between 80% and 100% WOT That is where we block the throttle open and tune to each rpm.
Of cource there are the other niceties like rev limiter and speedlimiter dial in modifications torque convertor tuning, transmission shift points etc. that you have to input. The device plugs into the OBDII socket and downloads your stock program then you upload one of the programs to the ECU.
That way you are always able to re-load your stock program before having the VX serviced. (prying eyes will never know)
He then makes a dyno run in each program to compare to the original.
FF
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