Ken
Here's the part I put there about the Diablo:
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Once installed, it overrides the original ROM in the ECU with its own, which we program. The chip remaps the ignition curves and advances timing curves by anywhere from 3-8 degrees, depending on load and rpm. The fuel curve is remapped by an average of 2% leaner than the original curve, mainly because the factory settings are set rich in order to cool the catalytic converter for low-grade fuel. High octane gasoline burns more complete and cooler than lower-grade gasoline. We trim the excess fuel based on high octane gasoline and by doing so we create a better air/fuel ratio, which equals more power, i.e. more efficient running engine.
For electronic transmissions (most 94-up cars and trucks), the line pressure is increased, firming up shifts. Shift points are optimized, controlled by mph at partial throttle and by rpm at wide-open throttle. The shift delay is reduced, allowing gears to engage quicker and torque convertor lockup parameters are adjusted.
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The Diablo tends to have a little more HP than the Superchips. Diablo also has the Delta chip which can have up to 3 settings. If California CARB certification is your concern then the Superchips is the way to go.





