Transmission shift point different when using Adaptive Cruise Control

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wakeboarder

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This is something that I have had my eye on for a while. When accelerating from a complete stop to 50 mph the transmission shift points seem to be different whether the acceleration is being done with ACC or my foot. I am almost always in ECO mode.

With ACC and behind a car that is accelerating faster than ACC in ECO mode.
The engine rpms are usually between 2000 to 2500 rpm and the boost is almost always near 0.

With my foot
The engine rpms are usually between 1500 to 2000 rpm and the boost is near 1/4 of the way up the guage.

I have tried the best I could to mimic the acceleration of the ACC, but if I give it more throttle, it ends up at a higher rpm and more boost.

Has anybody else noticed this? I know this is of no real significance, but it is just my observation.

Maybe it is just different transmission shift points and then the difference in boost is just a result of demanded engine power at that rpm.
EDIT: I corrected the rpm.
 
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Deadman

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Its called a computer that's unable to get good milage. Use your foot, you will gain 2-4 mpg over that junk.
My cruise can't break 21, my foot can break 25.
 

byathread

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Maybe it is just different transmission shift points and then the difference in boost is just a result of demanded engine power at that rpm.

I think so... I've also noticed that when resuming from a stop in regular or eco the trans shifts through every gear using acc. My foot skip shifts the 10 speed unless in sport, but, I can definitely stay out of the boost in regular or eco mode with my foot.
Learned to drive with the old man telling me to drive like I have an egg between my foot and gas or brake pedals, a skill that ****** a lot of folks off in a hurry off at times! @Deadman is dead on, the ACC will eat more gas (and brakes) than your foot unless you are right on top of cancelling it when it tries to apply brake, wish we could tune that behaviour a little differently.
 

SublimeHiPpOs

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I think so... I've also noticed that when resuming from a stop in regular or eco the trans shifts through every gear using acc. My foot skip shifts the 10 speed unless in sport, but, I can definitely stay out of the boost in regular or eco mode with my foot.
Learned to drive with the old man telling me to drive like I have an egg between my foot and gas or brake pedals, a skill that ****** a lot of folks off in a hurry off at times! @Deadman is dead on, the ACC will eat more gas (and brakes) than your foot unless you are right on top of cancelling it when it tries to apply brake, wish we could tune that behaviour a little differently.

How do you tell what gear it's in while in auto? I have haven't noticed the current gear in the display unless I'm in manual mode. (2018 Plat.)
 
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