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Post break-in performance?

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Old Feb 6, 2021 | 08:27 AM
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Default Post break-in performance?

My C8 has only 260 miles on it. So, still in break-in period.

Does performance (throttle response, shift points, etc) change dramatically after the break in period?

I ask because I have a 2017 Jag F-Type R (supercharged - 550HP) to compare 'Vette to. The Jag feels a lot quicker both from a dead stop and in rolling throttle roll-ons. A whole lot quicker.

I'm a bit disappointed and surprised. All of the info I've seen on the Jag is that it does 0-60 in 3.9 secs. The 'Vette is s'posed to do that in 2.8 secs. And yet my C8 (2021 2LT Z51) feels a lot slower.

If I blip the throttle in the Jag, it immediately throws me back in the seat. If I blip the throttle in the C8, I hear it downshift once or twice but then have to wait a second for the acceleration to kick in.

What am I missing?

Thanks.
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Old Feb 7, 2021 | 12:04 PM
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Report back after 500 miles. You are missing a considerable amount of torque in 1st and second gear until it reaches 500 miles. When you get to 500, put it in track mode and jump on it. It should walk your Jag.
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Old Feb 8, 2021 | 02:54 PM
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I thought the same, very underwhelming initially. Aside from the massive 30% torque reduction in 1st and 2nd, the car still feels lack luster in the rest of the gears. Speed Society published a dyno video on YouTube, it seems the car has reduced power output across the range until you hit 500 miles. See here:

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Old Feb 8, 2021 | 03:47 PM
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It is almost like GM told us this would be the case, and some people did not listen, or did not believe them. And these same people are the reason GM put the computer controlled limitations on to reduce warranty claims from improperly broken in cars.
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Old Feb 8, 2021 | 04:09 PM
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Originally Posted by Racer X
It is almost like GM told us this would be the case, and some people did not listen, or did not believe them. And these same people are the reason GM put the computer controlled limitations on to reduce warranty claims from improperly broken in cars.
Exactly, they would prefer 1500 miles but can you imagine all the complaining that would ensue? I'm taking it easy until 1500.
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