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The spark curve
in the stock EEC computer is totally wrong for
performance applications. Good for emissions,
bad for performance, and actually not great
for fuel economy as well. The spark curve is
not only the wrong shape, but the stock EEC
settings actually retard the timing as much as
9 degrees under certain heavy full throttle
use. Some people know this and have actually
advanced their base timing by as much as 21
degrees to make up for the retard. But all
this does is shift the poorly-shaped curve
higher, leading to detonation at times. We
can:
- Shape the spark curve for
optimum performance
- Change or remove the
ignition retard point
- Add or subtract idle spark
advance
- Add or subtract part
throttle spark advance
- Add or subtract wide open
throttle spark advance
- Change dwell settings
- Change the rate in which the
spark advances over time
(this is critical in drag racing)
- Eliminate the "torque
control" spark retard on 94-95 Mustangs.
The rumors are true. The ECU
literally retards the timing between gear
changes by as much as 15 degrees. We have
learned that Ford did this on purpose to keep
customers from breaking transmissions. And in
the process, slowed down two entire model
years. |
