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Originally Posted by 2023_ZL1-AUTO
Sounds like you understand great how your car is working. I have data logs that go from stock lower to a 9.45" lower, I can look at the boost and try to see the differential between the two, it might give you some kind of usable data.
I'm sure it's the tune each of our cars have, but, when I hit the beam at the end of the quarter mile I'm only in 5th gear. My TCM is tuned, and it auto shifts aggressively for the drag strip. So, it might be that mine holds a few gears longer at higher RPM (It shifts in some gears at +7100rpm.
If I can ask, what is your 1/4 ET, MPH and 60ft time? I'd be curious to compare to mine as I too have all stock internals.
Take care!
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My new tuner mentioned that the old tuner set my shift point to 7100rpm as well, he said the stock internals don't hold up well to shifting at that high of an RPM. I wonder if he was just trying to make the previous tuner look bad, or if he was on to something. Just something to think about and worth a conversation from the experts here on whether or not that RPM is an issue. Would hate for something to happen to the engine before you had the chance to pull the trigger on that 2650.
