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Corvette C3 Forum 1968 through 1982

1970 vette vibration issue

  #11  
Old 08-17-2018, 08:54 PM
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if it was just for economy they would not be on the performance cars. and the new vettes are still performance and they have spark advance on them. my friend has a hellcat and that has spark advance on it. so spark advance is not just for economy it is also performance. i watched the advance on the hellcat ahd saw it move for both normal driving and when i put it into performance mode. thanks bp
 
  #12  
Old 08-17-2018, 11:07 PM
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I think you're conflating mechanical advance and vacuum advance. I agree that mechanical advance is for performance, but vacuum advance was strictly for economy. You can run without vacuum advance and not see any difference in how the car performs.
 

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