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if the ECM retards due to a high MAT or other parameter, it will seem like the car will restrict RPM like a throttle closure. I have witnessed this in a 2018 ZL1...a close friend's car. He had air in his supercharger circuit and this caused an abrupt loss of power. You need to check data and double check the supercharger circuit. Get a reservoir and you won't have this problem anymore.
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'21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60'
'17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold)
'15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold)
'12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)
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