992 Carrera T Curb Weight Reduction
Pro
Joined: Jul 2012
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From: Lexington, KY
Burning Brakes
Joined: Apr 2021
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From: Southern California
Drifting
Joined: Aug 2004
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From: new york
This is the Varta battery spec for the 992:
https://api.data-varta-automotive.co...901076J382.pdf
20.4kg, or 44 pounds
https://api.data-varta-automotive.co...901076J382.pdf
20.4kg, or 44 pounds
Three Wheelin'
Joined: Oct 2020
Posts: 1,775
Likes: 1,540
From: Montreal
You’re right, I’m getting really thrown off! Let me try to get all of this straight. Ok, we know the lightweight lithium-ion battery is 12.75 kg (per one Porsche statement) or 28 lb (per the other Porsche statement). That’s correct because 12.75 kg = 28.1 lb.
The regular battery is either 60 lb / 27 kg (per one Porsche statement) or 38 kg / 83 lb (per the other Porsche statement).
So the lightweight battery saves at least 32 lb.
Now, how much does the RAS system by itself add weight? I’m trying to see how much total the RAS option saves (it saves 32 lb because of the battery but then must add a little weight for the actual RAS).
The regular battery is either 60 lb / 27 kg (per one Porsche statement) or 38 kg / 83 lb (per the other Porsche statement).
So the lightweight battery saves at least 32 lb.
Now, how much does the RAS system by itself add weight? I’m trying to see how much total the RAS option saves (it saves 32 lb because of the battery but then must add a little weight for the actual RAS).
Three Wheelin'
Joined: Oct 2020
Posts: 1,775
Likes: 1,540
From: Montreal
This is the Varta battery spec for the 992:
https://api.data-varta-automotive.co...901076J382.pdf
20.4kg, or 44 pounds
https://api.data-varta-automotive.co...901076J382.pdf
20.4kg, or 44 pounds
Burning Brakes
Joined: Apr 2021
Posts: 1,211
Likes: 494
From: Southern California
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Three Wheelin'
Joined: Oct 2020
Posts: 1,775
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From: Montreal
As far as I understand it, the RAS requires the power and stability of the Li-ion battery. So it would be a no-go to replace it with the AGM one.
Burning Brakes
Joined: Apr 2021
Posts: 1,211
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From: Southern California
Yea, probably not a good idea. If it works and I think in the best case scenario, it may only work for a while until the extra strain on the standard battery is too much for it to handle. That’s assuming the standard and li-ion batteries have similar outputs.
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From: Newport Beach, CA and Melbourne, Australia
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A year ago there was no option to use AGM or aftermarket LiON. It had to be the $2,500 OEM. I believe Antigravity was looking for a workaround but don't know where they're at.
Last edited by Wilder; Apr 4, 2023 at 03:34 PM.
Three Wheelin'
Joined: Oct 2020
Posts: 1,775
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From: Montreal
Quite possibly some marketing at play here.
Last edited by CanAutM3; Apr 4, 2023 at 11:02 AM.
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That is a good reference and starts to make some sense. Porsche, in the their press release, state that Li-ion battery replaces an equivalent 95 Ah AGM battery and hence the 32lb weight savings. If we speculate, maybe a bigger 95 Ah AGM battery is required for the RAS system and hence the claimed 32lb weight savings over that. But in reality, going from the standard AGM battery to the Li-ion is much less of a weight saving because the standard AGM battery is only a 70 Ah and not the 95 Ah that would be required to power the RAS. So if we assume ~45lb for the standard AGM battery, the true weight savings is ~17lb.
Quite possibly some marketing at play here.
Quite possibly some marketing at play here.
No, never.