Thread: Turbo Tuning
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Old 12-26-2009, 05:49 AM   #13
AleroB888
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This is the scan graph of my best (E.T.) run :



The cursor line is set just before it hit third gear. I prefer that method of displaying data. You can easily see everything that went on during the run. There was 1.4 degrees of KR seen at the beginning of third gear.

This is the Table/Histogam/Gauge display. The interesting thing here is that the IAT temp (measured at intake manifold) was 88 degrees F. at that point, but out of the supercharger it reaches well over 200 degrees.



Note how quickly the Cylinder Airmass maximum scale reading of 0.92 is reached, exceeding the capability of the stock PCM, at about 10-12 psi boost. This could be potential trouble for a turbo or centrifugal SC setup running high boost. Suppose the actual grams/cylinder is 1.04, or 1.16........does the PCM only read and respond to the timing set at 0.92? If so, a lower timing than needed at that value must be used to allow for safety in the unscanned range above it.
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