C7 weight gains??
06-21-2013, 10:16 AM
#1
Racer
Thread Starter
C7 weight gains??
I was just doing a little web surfing and found this on the C7's weight.
http://gmauthority.com/blog/2013/04/...e-3298-pounds/
I am just wondering if this is correct because I haven't seen a weight listed on GM's C7 site. I was expecting the C7 to be lighter then the C6 and was shocked at this article saying it weighs more. If true good thing they bumped the HP to make up for the extra weight.
http://gmauthority.com/blog/2013/04/...e-3298-pounds/
I am just wondering if this is correct because I haven't seen a weight listed on GM's C7 site. I was expecting the C7 to be lighter then the C6 and was shocked at this article saying it weighs more. If true good thing they bumped the HP to make up for the extra weight.
06-21-2013, 01:00 PM
#2
Team Owner
Yes it's true that the super lightweight C7 with it's aluminum frame and carbon fiber body panels weighs 13 pounds less than the obsolete overweight C6 GS with it's steel frame and fiberglass body panels. Of course, that's comparing the weight of the base C7 to the C6 GS which is the equivalent to the C7 Z51. You don't want to know how the weight of the C7 Z51 compares to the C6 GS.
PS- We don't talk about how the 3298 pound base C7 is 90 pounds heavier than the base C6. That's a no-no.
PS- We don't talk about how the 3298 pound base C7 is 90 pounds heavier than the base C6. That's a no-no.
06-21-2013, 01:16 PM
#3
Yes it's true that the super lightweight C7 with it's aluminum frame and carbon fiber body panels weighs 13 pounds less than the obsolete overweight C6 GS with it's steel frame and fiberglass body panels. Of course, that's comparing the weight of the base C7 to the C6 GS which is the equivalent to the C7 Z51. You don't want to know how the weight of the C7 Z51 compares to the C6 GS.
PS- We don't talk about how the 3298 pound base C7 is 90 pounds heavier than the base C6. That's a no-no.
PS- We don't talk about how the 3298 pound base C7 is 90 pounds heavier than the base C6. That's a no-no.
06-21-2013, 01:19 PM
#4
Burning Brakes
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I was just doing a little web surfing and found this on the C7's weight.
http://gmauthority.com/blog/2013/04/...e-3298-pounds/
I am just wondering if this is correct because I haven't seen a weight listed on GM's C7 site. I was expecting the C7 to be lighter then the C6 and was shocked at this article saying it weighs more. If true good thing they bumped the HP to make up for the extra weight.
http://gmauthority.com/blog/2013/04/...e-3298-pounds/
I am just wondering if this is correct because I haven't seen a weight listed on GM's C7 site. I was expecting the C7 to be lighter then the C6 and was shocked at this article saying it weighs more. If true good thing they bumped the HP to make up for the extra weight.
Although 100lbs heavier does sound about right, unfortunately every automaker also fudges curb weight. So to really find out what the true weight difference is, you'll need to get the NHTSA numbers from inside the driver's door, then re-calculate for empty weight.
06-21-2013, 01:40 PM
#5
Le Mans Master
Yes it's true that the super lightweight C7 with it's aluminum frame and carbon fiber body panels weighs 13 pounds less than the obsolete overweight C6 GS with it's steel frame and fiberglass body panels. Of course, that's comparing the weight of the base C7 to the C6 GS which is the equivalent to the C7 Z51. You don't want to know how the weight of the C7 Z51 compares to the C6 GS.
PS- We don't talk about how the 3298 pound base C7 is 90 pounds heavier than the base C6. That's a no-no.
PS- We don't talk about how the 3298 pound base C7 is 90 pounds heavier than the base C6. That's a no-no.
06-21-2013, 01:57 PM
#6
Safety Car
Yes it's true that the super lightweight C7 with it's aluminum frame and carbon fiber body panels weighs 13 pounds less than the obsolete overweight C6 GS with it's steel frame and fiberglass body panels. Of course, that's comparing the weight of the base C7 to the C6 GS which is the equivalent to the C7 Z51. You don't want to know how the weight of the C7 Z51 compares to the C6 GS.
PS- We don't talk about how the 3298 pound base C7 is 90 pounds heavier than the base C6. That's a no-no.
PS- We don't talk about how the 3298 pound base C7 is 90 pounds heavier than the base C6. That's a no-no.
But the C7 also faster, more powerful, more fuel efficient, more attractive, more technologically current, more refined, more luxurious, more capable, more competitive, more confidence inspiring to drive than the C6GS.
Looks like those additional 90lbs were very well spent.
06-21-2013, 02:00 PM
#7
Melting Slicks
Yes the C7 weighs more than the C6GS
But the C7 also faster, more powerful, more fuel efficient, more attractive, more technologically current, more refined, more luxurious, more capable, more competitive, more confidence inspiring to drive than the C6GS.
Looks like those additional 90lbs were very well spent.
But the C7 also faster, more powerful, more fuel efficient, more attractive, more technologically current, more refined, more luxurious, more capable, more competitive, more confidence inspiring to drive than the C6GS.
Looks like those additional 90lbs were very well spent.
06-21-2013, 02:15 PM
#8
Yes the C7 weighs more than the C6GS
But the C7 also faster, more powerful, more fuel efficient, more attractive, more technologically current, more refined, more luxurious, more capable, more competitive, more confidence inspiring to drive than the C6GS.
Looks like those additional 90lbs were very well spent.
But the C7 also faster, more powerful, more fuel efficient, more attractive, more technologically current, more refined, more luxurious, more capable, more competitive, more confidence inspiring to drive than the C6GS.
Looks like those additional 90lbs were very well spent.
Anybody concerned about the extra weight must ONLY use the car for the TRACK !
Most of us maybe 90% to 95% don't use it for the track.
So 100 or 300 lbs. more is NO BIG DEAL. if it makes for a better Corvette.
06-21-2013, 03:52 PM
#9
Team Owner
Maybe because the OP said ".......expecting the C7 to be lighter then the C6". To answer him I also had to reference the weight of the C7 vs the C6. Should I have referenced the weight of the C7 to a Ford F150?
06-21-2013, 03:54 PM
#10
Discussed ad nauseum already, but yes, the monstrous size and weight of the car is a philosopical disappointment for true enthusiasts, but GM figures most vette buyers don't care about performance much.
If you put this drivetrain, frame, and suspension under a c2 body and interior, it would weigh sub-2600 pounds... and be a better car than it is today in my opinion. But that is for the aftermarket at this point.
If you put this drivetrain, frame, and suspension under a c2 body and interior, it would weigh sub-2600 pounds... and be a better car than it is today in my opinion. But that is for the aftermarket at this point.
06-21-2013, 04:03 PM
#11
Safety Car
Yes the C7 weighs more than the C6GS
But the C7 also faster, more powerful, more fuel efficient, more attractive, more technologically current, more refined, more luxurious, more capable, more competitive, more confidence inspiring to drive than the C6GS.
Looks like those additional 90lbs were very well spent.
But the C7 also faster, more powerful, more fuel efficient, more attractive, more technologically current, more refined, more luxurious, more capable, more competitive, more confidence inspiring to drive than the C6GS.
Looks like those additional 90lbs were very well spent.
06-21-2013, 04:28 PM
#12
Discussed ad nauseum already, but yes, the monstrous size and weight of the car is a philosopical disappointment for true enthusiasts, but GM figures most vette buyers don't care about performance much.
If you put this drivetrain, frame, and suspension under a c2 body and interior, it would weigh sub-2600 pounds... and be a better car than it is today in my opinion. But that is for the aftermarket at this point.
If you put this drivetrain, frame, and suspension under a c2 body and interior, it would weigh sub-2600 pounds... and be a better car than it is today in my opinion. But that is for the aftermarket at this point.
06-21-2013, 04:30 PM
#13
06-21-2013, 06:52 PM
#15
Racer
Thread Starter
A 100 lbs doesn't sound like a big deal and it really isn't if you don't care about how weight effects performance and just bought the car as a driver. But those that are going to race the car (like the ones talking running into the high 10's in another thread) it should be a concern. I've read the 100lbs=10hp=.1 sec in the 1/4 mile thing many times in Car Craft and Hot Rod. But I am sure that's a pretty general statement and would be different considering the car somewhat. And if the Z51 is another 200 lbs heavier then the base coupe the hp gains of the LT1 would be taken up moving the heavier car. So if the C7 Z51 is 300 lbs heavier then lets say a LS3 powered base coupe the power to weight ratio would be about equal between the two.
06-21-2013, 07:18 PM
#18
Race Director
Assuming GM's published claims hold up in production cars, we can put the track thing to rest, as it is clear the stock C7 Z51 is faster around a circuit than any stock previous-gen Corvettes except the Z06(1 sec quicker, verified), Z06 Z07 (4-5 sec quicker, estimated), and the ZR1 (7 sec quicker, verified). Note that the fastest, is also the heaviest car of all. So if you plan to track the car stock, then no worries - the porky Z51 will deliver.
Now if you are looking to build a purpose Corvette track car, you would be better off starting with a used C5 Z06, an LS3 C6, or a C6 Z06, as any of these will be way lighter. I have a C5 Z51 that is set up as a track car, and it weighs 3095 with a tank of fuel. I dropped over 100lb by putting in race seats (Sparco Roadsters, -50lb), CCW 18 Wheels with Toyo R888 (335 rear, 295 front) - minus 6 each front wheel and -10 each rear wheel, and Lexan hatch glass -25lb.
Now if you are looking to build a purpose Corvette track car, you would be better off starting with a used C5 Z06, an LS3 C6, or a C6 Z06, as any of these will be way lighter. I have a C5 Z51 that is set up as a track car, and it weighs 3095 with a tank of fuel. I dropped over 100lb by putting in race seats (Sparco Roadsters, -50lb), CCW 18 Wheels with Toyo R888 (335 rear, 295 front) - minus 6 each front wheel and -10 each rear wheel, and Lexan hatch glass -25lb.
06-21-2013, 07:19 PM
#19
So where does all the extra weight come from. There is a 100 lb savings in the frame and carbon fiber body parts and ends up over a 100 lbs more than a base C6. What makes up the extra couple of hundred pounds?
06-21-2013, 07:36 PM
#20
Racer
Thread Starter
"Areas Of Mass Reduction
◾Frame: 99 pounds lighter
◾Body panels: 37 pounds lighter
◾Hatch: several pounds lighter
◾Control arms: now hollow, several pounds
Total weight savings is in the vicinity of 150 pounds, or 68 kg.
Areas of Mass Addition
◾35.2 pounds — direct injection, VVT, AFM
◾6.6 pounds — standard engine oil cooler
◾13.2 pounds — dual mass clutch
◾15.4 pounds — steel torque tube part of AFM
◾5.5 pounds — AFM exhaust valves
◾11 pounds — 7th transmission speed
◾18.5 pounds — strengthened differential, half shafts
◾18.3 pounds — larger fixed brakes
◾17 pounds — new interior appointments and safety features
◾17.2 pounds — upgraded seats
◾18.5 pounds — structural safety requirements
◾31.5 pounds — new infotainment and cabin technology, as well as relocating battery to the rear
◾3 pounds — bigger fuel tank
That’s a total weight gain of 210 pounds, or 95 kg.
Opting for the Z51 performance package would add transmission and differential coolers, a rear sway bar, larger wheels, electronic differential, and a spoiler. Although unconfirmed, these changes will most likely result in the addition of 150-200 pounds."