Some days my car runs great, some days it runs amazing! I can literally do a pull and the car runs strong, and the rear end skates around then 10 min later it feels like ive got 4 ppl in the trunk. Ive considered heat soak, but i usually only have the car out in the evenings or night and the pulls are spaced so far apart its had plenty of time to cool. Sometimes it seems like its an issue dealing with the ignition, like i run the car, park get back in and it runs better/worse. Does any of this make sense or is it in my head and just the nature of these cars?