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Weight reduction..?

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Old Jun 24, 2022 | 10:21 AM
  #41  
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You could try anti gravity batteries, there is a direct fit but it's very expensive. I have been considering their atx30 model, it's half the cost but would need a bracket.

https://antigravitybatteries.com/pro...-oem/atx30-rs/
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Old Jun 24, 2022 | 11:30 AM
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Originally Posted by Aardwolf
You could try anti gravity batteries, there is a direct fit but it's very expensive. I have been considering their atx30 model, it's half the cost but would need a bracket.

https://antigravitybatteries.com/pro...-oem/atx30-rs/
I've been using the ATX-30RS for awhile now, zero issues, works great! I use a small pelican case bolted down with 3/8" bolts as my battery box.

If you try you can make a C6 lightweight. I'm sitting right about 2,500lbs with twin turbos. It got down to 2,700lbs fairly easily, the rest took a bit more work.
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Old Jun 24, 2022 | 02:06 PM
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Originally Posted by im50fast
I’m very intrigued with the battery you shared.
you mention track use- do you know of any reason it may not be good for daily driver use?
As long as the car doesn't sit for an extended period of time it should be perfectly fine. I disconnect the main power lead to the underhood fuse panel after each race but I've left connected for several days and it still starts fine.
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Old Jun 24, 2022 | 10:02 PM
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As was mentioned, your 15 spoke wheels are Corvette - not aftermarket - wheels. The are a forged wheel, called super alloy, by GM and/or the manufacturer. If I remember correctly mine weighed approximately 20# front and 22# rear. And, as was mentioned, you will spend lots of money to get an appreciable drop in wheel weight.
Also, I see these described as chrome wheels. Mine are polished alloy, and I am not familiar with the factory offering this in chrome (although some owners may have chosen to have theirs chromed).
Some people really like the style of the 15 spoke wheel since it was a GM copy of the wheels run on late Pratt & Miller C5 race cars.

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Old Jun 25, 2022 | 06:10 AM
  #45  
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Originally Posted by jayyyw
I used the same battery for a while. I didn't have any issues in a daily driver. A friend of mine also used the same battery and it popped one day. I sold mine after that.
what exactly do you mean by popped?
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Old Jun 25, 2022 | 06:23 AM
  #46  
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Originally Posted by Route99
As was mentioned, your 15 spoke wheels are Corvette - not aftermarket - wheels. The are a forged wheel, called super alloy, by GM and/or the manufacturer. If I remember correctly mine weighed approximately 20# front and 22# rear. And, as was mentioned, you will spend lots of money to get an appreciable drop in wheel weight.
Also, I see these described as chrome wheels. Mine are polished alloy, and I am not familiar with the factory offering this in chrome (although some owners may have chosen to have theirs chromed).
Some people really like the style of the 15 spoke wheel since it was a GM copy of the wheels run on late Pratt & Miller C5 race cars.
im very new to corvettes. Exactly what do you mean by “lots of money”? Money is relative, and I’m not on the low end of it.
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Old Jun 25, 2022 | 07:16 AM
  #47  
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Originally Posted by im50fast
what exactly do you mean by popped?
exploded
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Old Jun 25, 2022 | 09:38 AM
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I just came across this lithium battery...as a less expensive option perhaps.
any thoughts on it compared to the others that have been mentioned? https://no.co/nlp30
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Old Jun 25, 2022 | 12:41 PM
  #49  
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I think it's to little AH for most use. I was reading some back threads on moving a smaller bat to the rear that's a good option too.
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Old Jun 25, 2022 | 03:43 PM
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Originally Posted by tommyc6z06
I just came across this lithium battery...as a less expensive option perhaps.
any thoughts on it compared to the others that have been mentioned? https://no.co/nlp30
Originally Posted by Aardwolf
I think it's to little AH for most use. I was reading some back threads on moving a smaller bat to the rear that's a good option too.
I agree with that, with newish technology, just like when patents expire, manufactures near leading companies. For lithium the pricepoint is interesting, I might try it out.
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Old Jun 25, 2022 | 07:39 PM
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I removed my wiper fluid this evening by getting it started with a vacuum then let it drain. 8.5 lb loss. This isn't something that I need in this car anyway.

Last edited by rybern; Jun 25, 2022 at 10:20 PM.
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Old Jun 25, 2022 | 08:30 PM
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Originally Posted by rybern
I removed my wiper fluid this evening by getting it started with a vacuum then let it drain. 8.5 lb loss. This isn't something that I need in this car.
I vacuum as well, for microscopic particles, makes for a faster car.
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Old Jun 26, 2022 | 01:42 AM
  #53  
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Originally Posted by Aardwolf
I think it's to little AH for most use. I was reading some back threads on moving a smaller bat to the rear that's a good option too.
The downside to a rear mount, is the weight of the cable needed to get power back to the front.
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Old Jun 26, 2022 | 06:35 AM
  #54  
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Originally Posted by Aardwolf
I think it's to little AH for most use. I was reading some back threads on moving a smaller bat to the rear that's a good option too.
what is AH?
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Old Jun 26, 2022 | 07:57 AM
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Originally Posted by im50fast
I’m very intrigued with the battery you shared.
you mention track use- do you know of any reason it may not be good for daily driver use?
Tiny capacity. Heat from the engine bay. Insane cost for little weight savings.
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Old Jun 26, 2022 | 08:01 AM
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Originally Posted by im50fast
im very new to corvettes. Exactly what do you mean by “lots of money”? Money is relative, and I’m not on the low end of it.
An HRE or vossen or similar quality forged wheel is about 3k per wheel. Well, they were a couple years ago, they're mlprobably more now. Budget 12 to 15k for the set before tires.
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Old Jun 26, 2022 | 08:56 AM
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Originally Posted by Scout51
I vacuum as well, for microscopic particles, makes for a faster car.
I keep the car well vacuumed. But I've seen cars that are not and dirt build up can certainly make a difference.

Originally Posted by im50fast
what is AH?
I believe AH is being referred to as amp/hour... or how powerful the battery is.
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Old Jun 26, 2022 | 09:45 AM
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Originally Posted by FAUEE
An HRE or vossen or similar quality forged wheel is about 3k per wheel. Well, they were a couple years ago, they're mlprobably more now. Budget 12 to 15k for the set before tires.
or you can try used 18" Forgelines (or similar) and not merely reduce weight, but 'unsprung' weight, which also happens to be rotating mass. HUGE difference that can be felt on track...like losing a passenger. I paid under $3k for mine and they looked brand new.
As point of interest, I weighed different wheel/tire setups on my C6Z (keeping in mind that tire sizes/construction also account for much of these differences)
Fronts:
C6Z OE Speedline 18x9.5: 275/35 Firestone Indy 500 54.2lbs
C7Z 19x10: 285/30 MPSC2ZP 61.2lbs

Forgeline GA3R 18x11: 295/30x18 R888R 51.2lbs
w/Pirelli slicks used scrubs 305/645-18 49.6lbs

Rears:
C6Z OE Speedline 19x12: 325/30 Firestone Indy 500 60.4lbs
C7Z 20x12: 335/25 MPSC2ZP 64.5lbs

Forgeline GA3R 18x12.5: 335/30x18 R888R 55.4lbs
w/Pirelli slicks used scrubs 325/680- 1849.4lbs

Trying a set of inexpensive 2nd hand C7Z wheels was the biggest downgrade I'd ever made...despite the particular tires astonishing grip.

Some ramblings; I used to race a 2400lb car and we found that each 10lbs weight on a long 4mi track (approx 2:15min lap) cost about 1/10th second. And that weight was mounted low as ballast. Of course this will vary wildly based on the car, track, etc, but its safe to say that a 200lb passenger would hypothetically cost 2sec/lap...asides from changed dynamics/handling/braking. Lots there...

Also, I somehow forgot in all this that not all C6s have their batteries in the trunk. I don't know much about drag racing, but wonder if that weight in the rear is quite as detrimental.
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Old Jun 26, 2022 | 09:58 AM
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Originally Posted by tommyc6z06
or you can try used 18" Forgelines (or similar) and not merely reduce weight, but 'unsprung' weight, which also happens to be rotating mass. HUGE difference that can be felt on track...like losing a passenger. I paid under $3k for mine and they looked brand new.
As point of interest, I weighed different wheel/tire setups on my C6Z (keeping in mind that tire sizes/construction also account for much of these differences)
Fronts:
C6Z OE Speedline 18x9.5: 275/35 Firestone Indy 500 54.2lbs
C7Z 19x10: 285/30 MPSC2ZP 61.2lbs

Forgeline GA3R 18x11: 295/30x18 R888R 51.2lbs
w/Pirelli slicks used scrubs 305/645-18 49.6lbs

Rears:
C6Z OE Speedline 19x12: 325/30 Firestone Indy 500 60.4lbs
C7Z 20x12: 335/25 MPSC2ZP 64.5lbs

Forgeline GA3R 18x12.5: 335/30x18 R888R 55.4lbs
w/Pirelli slicks used scrubs 325/680- 1849.4lbs

Trying a set of inexpensive 2nd hand C7Z wheels was the biggest downgrade I'd ever made...despite the particular tires astonishing grip.

Some ramblings; I used to race a 2400lb car and we found that each 10lbs weight on a long 4mi track (approx 2:15min lap) cost about 1/10th second. And that weight was mounted low as ballast. Of course this will vary wildly based on the car, track, etc, but its safe to say that a 200lb passenger would hypothetically cost 2sec/lap...asides from changed dynamics/handling/braking. Lots there...

Also, I somehow forgot in all this that not all C6s have their batteries in the trunk. I don't know much about drag racing, but wonder if that weight in the rear is quite as detrimental.
If you subscribe to the Porsche perspective, weight in the rear is a good thing, haha.

But yeah, weight over the rear axle does actually have some real benefits, increased traction at launch or corner exit, ability to increase grip by applying power, etc. Just can't get too much slip angle or it goes to hell quick
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Old Jun 26, 2022 | 04:14 PM
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Originally Posted by im50fast
im very new to corvettes. Exactly what do you mean by “lots of money”? Money is relative, and I’m not on the low end of it.
Originally Posted by FAUEE
An HRE or vossen or similar quality forged wheel is about 3k per wheel. Well, they were a couple years ago, they're mlprobably more now. Budget 12 to 15k for the set before tires.
Originally Posted by tommyc6z06
or you can try used 18" Forgelines (or similar) and not merely reduce weight, but 'unsprung' weight, which also happens to be rotating mass. HUGE difference that can be felt on track...like losing a passenger. I paid under $3k for mine and they looked brand new.
As point of interest, I weighed different wheel/tire setups on my C6Z (keeping in mind that tire sizes/construction also account for much of these differences)
Fronts:
C6Z OE Speedline 18x9.5: 275/35 Firestone Indy 500 54.2lbs
C7Z 19x10: 285/30 MPSC2ZP 61.2lbs

Forgeline GA3R 18x11: 295/30x18 R888R 51.2lbs
w/Pirelli slicks used scrubs 305/645-18 49.6lbs

Rears:
C6Z OE Speedline 19x12: 325/30 Firestone Indy 500 60.4lbs
C7Z 20x12: 335/25 MPSC2ZP 64.5lbs

Forgeline GA3R 18x12.5: 335/30x18 R888R 55.4lbs
w/Pirelli slicks used scrubs 325/680- 1849.4lbs

Trying a set of inexpensive 2nd hand C7Z wheels was the biggest downgrade I'd ever made...despite the particular tires astonishing grip.

Some ramblings; I used to race a 2400lb car and we found that each 10lbs weight on a long 4mi track (approx 2:15min lap) cost about 1/10th second. And that weight was mounted low as ballast. Of course this will vary wildly based on the car, track, etc, but its safe to say that a 200lb passenger would hypothetically cost 2sec/lap...asides from changed dynamics/handling/braking. Lots there...

Also, I somehow forgot in all this that not all C6s have their batteries in the trunk. I don't know much about drag racing, but wonder if that weight in the rear is quite as detrimental.
I was going to suggest some not as expensive, but fully forged wheels such as Finspeed, BC, or others in this category, but they are still $700-$1800 per wheel with minimal weight loss over GM forged Corvette wheels. I understand for many "money is relative" and it is nice to "not be on the low end of it," but I still like to see some viable, quantifiable result for the expenditure.
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