" From: <mail@xxxxxxxxxxxx> " " " " http://tinyurl.com/hok92 " " - or - " " http://www.customefis.com/rttuning.html " " " by using a cheap Laptop , a ROMulator II, " and an upgrade for your TunerCat > you " can change the 'chip' information as you " drive > forget 'burning' a new chip outside " the ECM. you would want to burn a chip ultimately, when you get all the values tweaked, so you don't have to run around with the notebook and romulator spaghetti floating around. " Nice thing is it works BEST on pre GM 1996 " ECM units ~~! " " " Author claims it blows off ACCELs DFI unit hands-down. " " " Worth a read & a bookmark! " " " " " Brien. in principle you could do much the same with an obd2 setup. upload the baseline maps, then drive around monitoring the sensor readings and seeing where the ecm was in its self-calibration windows, then generate and download/flash a corrected map and repeat. much of the tiresom watching/thinking part could be automated in notebook software. ________________________________________________________________________ Andrew Hay the genius nature internet rambler is to see what all have seen adh@xxxxxxxxxxxxxxxxx and think what none thought