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There's actually quite a bit of stuff we can change with the Predator. The guys that do the custom tunes use software called CMR (Chipmaster Revolution) that gives them access to pretty much everything regarding the operation of the motor including fuel tables, volumetric efficiency, spark advance, throttle response, etc. Even some PCM logic can be changed so that things like knock sensors and misfire sensors can be made more or less sensitive.

These CMR tunes are then uploaded to the Predator which in turns modifies the PCM logic in our cars.


Can someone explain exactly what the tune does? I was under the impression a normally aspirated could not really be "tuned"? I had a G35 prior to this car and the VQ engines could not be tuned at all. So what does the Predator or Diablo tune actually do? Thanks
 
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