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I will have it back to the track next friday night. I will try the other shift options and maybe I can fab up a CAI to test with if I have time.
As far as breaking the engine in.... I run them all hard. As a piston ring engineer I know the engine has to be loaded to properly seat a ring. Cruising the car down the highway will not do this (It will over time). I have already read most of the breakin post on here and there are a few who understand the concept of engine breakin. I would bet most of these guys have a race car as well.
My advice is break it in on how you feel it should be... Its your car and your money.
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2023 ZL1
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