GT performance drop off

[nuMach]

Had a coworker who had a Tesla years back when i considered an EV. Asked him if performance dropped off as the battery charge dropped off. He was adamant the performance remained constant , and the battery likely had an un-accessible zone that assisted as the range dropped to 0, to maintain useable power before the electronics cut off supply at indicated '0'.

The standard battery Select AWD I had previous seemed to follow my co-workers experience, as it always felt the same at 100"% to 20, where I tried to target a recharge.

The new 25 GT/PE has a very observable drop off once the battery is below 50%. At 20% the fun factor is near zero. Not sure where between 100/90, and 50%, things really fade to a noticeable degree.

Kind of answering my own question by saying I should adopt the ABC motto "always be charging", and keep it at 80 or 90%.

However curious if anyone has enough seat time to know if its a gradual taper, or there are programmed points where a certain % is is cut as the charge drops?

Ie, where does the fun fail?

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[markboris]

https://www.macheforum.com/site/threads/mache-gt-gtpe-performance-limiters-explained.31200/

 

[Vitesse]

The drop-off is very noticeable. I believe Ford's performance claims are for summer tires and battery > 90%. So, 100% charge is for road trips and... fun! Fun is too subjective, but I tend to take folks for show-off launches at battery > 80%.

I assume all performance oriented EVs are the same. It is theoretically possible to use a boost voltage converter (keep voltage to motors nearly constant), but I am not aware of anything like that at these power levels.

 

[Mach-Lee]

Different brands handle this differently, but due to our battery being more limited in current and voltage drop than Tesla's, we get more of a torque loss at low state of charge and low battery temps.

On a GT it would be noticeable sooner, but for me it's when the battery is below about 75% or below about 8ºC. At 20% there is a significant loss of power compared to 90%.

To have max power available, you'd want to plug in and charge to 90% and set a departure time each day you drive.

 

[AliRafiee]

Do the 25s have the powermeter?

 

[nuMach]

Do the 25s have the powermeter?

yes, right side. I've noticed it jumps with added pedal, but possibly erroneously, I've passed it off as a novelty.

Haven't noticed the jail bars, but figure I'd need to be doing more than a short sprint for fun.

Didn't think till you mentioned it to see if it still goes high with lower battery levels and full throttle.

Something to observe going forward.

 

[GreaseMonkey]

You guys are getting me VERY EXCITED. I have never had the car at higher than 90% SoC, except when I took delivery and drove snail pace in heavy traffic. So looking forward stuffing the battery to the max in the late spring and letting it rip. Can’t imagine what the extra power would feel like, cause what I’ve been getting is (to borrow from the shit brand) “ludicrous”. To me at least.

 

[MacherAWD]

The standard battery Select AWD I had previous seemed to follow my co-workers experience, as it always felt the same at 100"% to 20, where I tried to target a recharge.

I have a 2021, SR, AWD select, my power drop off is noticeable, above 90% feels different than 70-90% and then below 70 is also slower, the closer to 0% the slower the car gets, has always been this way.

 

[GreaseMonkey]

yes, right side. I've noticed it jumps with added pedal, but possibly erroneously, I've passed it off as a novelty.

Haven't noticed the jail bars, but figure I'd need to be doing more than a short sprint for fun.

Didn't think till you mentioned it to see if it still goes high with lower battery levels and full throttle.

Something to observe going forward.

It doesn’t go too high. Not nearly as high as 21-23s. I’ve never had it go higher than maybe 5 bars no matter what I do. And I have a 24 with PU.

 

[E90alex]

I personally don’t notice much difference on my 25 GT, but I’m not doing 0-60 runs all day. Normal spirited driving feels the same even with aggressive acceleration to normal city speeds.

I also don’t have the performance upgrade so that might make a difference since it’s not maxed out. Usually the highest performance models will have the biggest difference in power output as SOC drops.

Tesla Performance models definitely have a power loss with lower SOC as well so your friend just doesn’t have a very sensitive butt dyno.

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