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Discussion Starter · #1 ·
I wanted to check with you guys if you experience the same or this is just an illusion. I got my new HV battery and 6.28 and since then I think I experience a hole in accelerating from 0mph to 60mph. At 30mph you can feel the acceleration slower down.
Do you also experience the same or do you have a smooth acceleration to 60mph? Sure, the torque is going down during increasing speed, but it should be smooth. Thanks for any comment.
 

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michaelCA said:
I wanted to check with you guys if you experience the same or this is just an illusion. I got my new HV battery and 6.28 and since then I think I experience a hole in accelerating from 0mph to 60mph. At 30mph you can feel the acceleration slower down.
Do you also experience the same or do you have a smooth acceleration to 60mph? Sure, the torque is going down during increasing speed, but it should be smooth. Thanks for any comment.
I've never noticed this myself, and accelerate from 0 to 50 or 60 regularly. I'm almost always in Stealth. Are you in Stealth, Sport, or Stealth-but-zero-battery mode?
 

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Discussion Starter · #3 ·
LonePalmBJ said:
michaelCA said:
I wanted to check with you guys if you experience the same or this is just an illusion. I got my new HV battery and 6.28 and since then I think I experience a hole in accelerating from 0mph to 60mph. At 30mph you can feel the acceleration slower down.
Do you also experience the same or do you have a smooth acceleration to 60mph? Sure, the torque is going down during increasing speed, but it should be smooth. Thanks for any comment.
I've never noticed this myself, and accelerate from 0 to 50 or 60 regularly. I'm almost always in Stealth. Are you in Stealth, Sport, or Stealth-but-zero-battery mode?
I am in Stealth mode (battery fully charged).
 

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michaelCA said:
LonePalmBJ said:
michaelCA said:
I wanted to check with you guys if you experience the same or this is just an illusion. I got my new HV battery and 6.28 and since then I think I experience a hole in accelerating from 0mph to 60mph. At 30mph you can feel the acceleration slower down.
Do you also experience the same or do you have a smooth acceleration to 60mph? Sure, the torque is going down during increasing speed, but it should be smooth. Thanks for any comment.
I've never noticed this myself, and accelerate from 0 to 50 or 60 regularly. I'm almost always in Stealth. Are you in Stealth, Sport, or Stealth-but-zero-battery mode?
I am in Stealth mode (battery fully charged).
There was a discussion a while back about the limits imposed by the inverters when you apply full open throttle. As I recall, they start stepping power down in stages after around 10 seconds. This should be plenty of time to get you to 60 MPH, but you may have an inverter that is cutting out too early or the control software in your car is not allowing the inverters to stay at full power long enough.

If the problem is easily repeatable and reproducible on demand, you may want to have the dealer check the car.

Personally, I have not experienced this phenomenon, so I don't think it is present in all Karmas.
 

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Discussion Starter · #5 ·
Fabulist said:
michaelCA said:
LonePalmBJ said:
michaelCA said:
I wanted to check with you guys if you experience the same or this is just an illusion. I got my new HV battery and 6.28 and since then I think I experience a hole in accelerating from 0mph to 60mph. At 30mph you can feel the acceleration slower down.
Do you also experience the same or do you have a smooth acceleration to 60mph? Sure, the torque is going down during increasing speed, but it should be smooth. Thanks for any comment.
I've never noticed this myself, and accelerate from 0 to 50 or 60 regularly. I'm almost always in Stealth. Are you in Stealth, Sport, or Stealth-but-zero-battery mode?
I am in Stealth mode (battery fully charged).
There was a discussion a while back about the limits imposed by the inverters when you apply full open throttle. As I recall, they start stepping power down in stages after around 10 seconds. This should be plenty of time to get you to 60 MPH, but you may have an inverter that is cutting out too early or the control software in your car is not allowing the inverters to stay at full power long enough.

If the problem is easily repeatable and reproducible on demand, you may want to have the dealer check the car.

Personally, I have not experienced this phenomenon, so I don't think it is present in all Karmas.
@Fabulist: Thank you. Ok, I will have the dealer look into it.
 

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michaelCA said:
Fabulist said:
michaelCA said:
LonePalmBJ said:
michaelCA said:
I wanted to check with you guys if you experience the same or this is just an illusion. I got my new HV battery and 6.28 and since then I think I experience a hole in accelerating from 0mph to 60mph. At 30mph you can feel the acceleration slower down.
Do you also experience the same or do you have a smooth acceleration to 60mph? Sure, the torque is going down during increasing speed, but it should be smooth. Thanks for any comment.
I've never noticed this myself, and accelerate from 0 to 50 or 60 regularly. I'm almost always in Stealth. Are you in Stealth, Sport, or Stealth-but-zero-battery mode?
I am in Stealth mode (battery fully charged).
There was a discussion a while back about the limits imposed by the inverters when you apply full open throttle. As I recall, they start stepping power down in stages after around 10 seconds. This should be plenty of time to get you to 60 MPH, but you may have an inverter that is cutting out too early or the control software in your car is not allowing the inverters to stay at full power long enough.

If the problem is easily repeatable and reproducible on demand, you may want to have the dealer check the car.

Personally, I have not experienced this phenomenon, so I don't think it is present in all Karmas.
@Fabulist: Thank you. Ok, I will have the dealer look into it.
I noticed the same thing after having my software upgraded to 6.28. I can repeat it anytime I hit the pedal hard. Feels like hitting the red line in a Vette and the computer shuts you down.
 

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Discussion Starter · #7 ·
MArkansas said:
michaelCA said:
Fabulist said:
michaelCA said:
LonePalmBJ said:
I've never noticed this myself, and accelerate from 0 to 50 or 60 regularly. I'm almost always in Stealth. Are you in Stealth, Sport, or Stealth-but-zero-battery mode?
I am in Stealth mode (battery fully charged).
There was a discussion a while back about the limits imposed by the inverters when you apply full open throttle. As I recall, they start stepping power down in stages after around 10 seconds. This should be plenty of time to get you to 60 MPH, but you may have an inverter that is cutting out too early or the control software in your car is not allowing the inverters to stay at full power long enough.

If the problem is easily repeatable and reproducible on demand, you may want to have the dealer check the car.

Personally, I have not experienced this phenomenon, so I don't think it is present in all Karmas.
@Fabulist: Thank you. Ok, I will have the dealer look into it.
I noticed the same thing after having my software upgraded to 6.28. I can repeat it anytime I hit the pedal hard. Feels like hitting the red line in a Vette and the computer shuts you down.
Correct! Also around at 30mph? I tried this afternoon again and I can feel it like you said you are hitting the red line.
 

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michaelCA said:
MArkansas said:
michaelCA said:
Fabulist said:
michaelCA said:
I am in Stealth mode (battery fully charged).
There was a discussion a while back about the limits imposed by the inverters when you apply full open throttle. As I recall, they start stepping power down in stages after around 10 seconds. This should be plenty of time to get you to 60 MPH, but you may have an inverter that is cutting out too early or the control software in your car is not allowing the inverters to stay at full power long enough.

If the problem is easily repeatable and reproducible on demand, you may want to have the dealer check the car.

Personally, I have not experienced this phenomenon, so I don't think it is present in all Karmas.
@Fabulist: Thank you. Ok, I will have the dealer look into it.
I noticed the same thing after having my software upgraded to 6.28. I can repeat it anytime I hit the pedal hard. Feels like hitting the red line in a Vette and the computer shuts you down.
Correct! Also around at 30mph? I tried this afternoon again and I can feel it like you said you are hitting the red line.
I spend a lot of my commute getting on and off freeways and have never had a problem accelerating to highway speed (70+ MPH) on the ramps, and certainly no acceleration hole at any speed in between. I do not floor the accelerator, however. Can you guys reproduce the problem with less than full throttle? I will try full throttle to see if I can replicate this in my car running 628. It may only manifest itself at the limit.
 

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I tried the acceleration with WOT up to 65 today. Smooth and quick. i am on 628.
 

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Discussion Starter · #10 ·
I will have the dealer over tomorrow. I will demonstrate it to him and let you guys know what he thinks. Thank you all for testing this.
 

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michaelCA said:
I will have the dealer over tomorrow. I will demonstrate it to him and let you guys know what he thinks. Thank you all for testing this.
I went through some of the old posts from @Nimsys and the most relevant one said that the inverters go into limp mode at around 150C and then return to normal operation fairly quickly afterwards when the inverter cools down. This may mean that your inverters are overheating for some reason or that the temperature sensor is not working correctly. If the problem is repeatable, they should be able to solve it pretty quickly. Good luck.
 

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Discussion Starter · #12 ·
Fab, heat could be the problem, I agree. We have here about 105F during the day. Will see tomorrow what he says.
 

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i've noticed the same thing, and haven't updated to 6.28 and am very interested in what your dealer says, and whether it fills the hole. Keep us posted.
 

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I'm running 6.28 and, after reading the previous posts, just had to go out and see about the acceleration. BTW, I live near Dallas and it is hot. Accelerating from 0-60 didn't skip a beat. Did this several times over an hour drive. No hesitation at all.
 

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Same here-- high 80s to 90s and very humid for several weeks and no noticeable acceleration hole from 0-60, though I rarely floor it. I'm always in Stealth mode.
 

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Bert Yetman said:
That ain't hot, drliu. Hot is over 100.
Bert, hurry and get out and drive while we have California temperatures here. Got to love some rain in August!
I have not noticed any acceleration hole at 30mph or any other speed. My car seems to pull hard and steady from 0-70mph. Tried it specifically on Wednesday.
 

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Sigurd, I find an excuse to drive every day. My only problem with the rain is that it got my Karma dirty. Tomorrow it will be clean again.
 

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Running 6.28 and no accel problems. I did have a hiccup accelerating full throttle once when the switch over due to battery depletion happened, once.
 
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